user_id
stringlengths 24
24
| time
stringlengths 24
24
| feature_type
stringclasses 5
values | feature_version
stringclasses 2
values | input_question
stringlengths 1
1.24k
⌀ | input_code
stringlengths 2
18.5k
⌀ | input_intention
stringlengths 1
2.48k
⌀ | input_task_description
stringlengths 18
3.32k
⌀ |
|---|---|---|---|---|---|---|---|
63c647635f004bf4898cf351 | 2023-01-18T04:30:17.303Z | Question from Code | v1 | assign the amount in rain_today to the space rainfall points to | int main(int argc, char **argv) {
float *rainfall;
float rain_today;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-07T21:51:18.185Z | Question from Code | v1 | Why am I getting segmentation fault | int create_user(const char *name, User **user_ptr_add) {
if (strlen(name) >= MAX_NAME) {
return 2;
}
User *curr = *user_ptr_add;
while (curr->next != NULL) {
if (strcmp(name, curr->name) == 0) {
return 1;
}
curr = curr->next;
}
User *new_user = malloc(sizeof(User));
strncpy(new_user->name, name, sizeof(MAX_NAME - 1));
(new_user->name)[MAX_NAME - 1] = '\0';
curr->next = new_user;
new_user->next = NULL;
return 0;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-07T22:17:08.664Z | Question from Code | v1 | strcmp is not working | int create_user(const char *name, User **user_ptr_add) {
if (strlen(name) >= MAX_NAME) {
return 2;
}
// make new user
User *new_user = malloc(sizeof(User));
strncpy(new_user->name, name, sizeof(MAX_NAME - 1));
(new_user->name)[MAX_NAME - 1] = '\0';
User *curr = *user_ptr_add;
if (curr == NULL) {
curr = new_user;
new_user->next = NULL;
return 0;
}
while (curr->next != NULL) {
if (strcmp(name, curr->name) == 0) {
return 1;
}
curr = curr->next;
}
curr->next = new_user;
new_user = NULL;
return 0;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-07T22:17:57.317Z | Question from Code | v1 | is curr->name a string | int create_user(const char *name, User **user_ptr_add) {
if (strlen(name) >= MAX_NAME) {
return 2;
}
// make new user
User *new_user = malloc(sizeof(User));
strncpy(new_user->name, name, sizeof(MAX_NAME - 1));
(new_user->name)[MAX_NAME - 1] = '\0';
User *curr = *user_ptr_add;
if (curr == NULL) {
curr = new_user;
new_user->next = NULL;
return 0;
}
while (curr->next != NULL) {
if (strcmp(name, curr->name) == 0) {
return 1;
}
curr = curr->next;
}
curr->next = new_user;
new_user = NULL;
return 0;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-07T22:18:59.859Z | Question from Code | v1 | how do I know whether name and curr->name are the same | int create_user(const char *name, User **user_ptr_add) {
if (strlen(name) >= MAX_NAME) {
return 2;
}
// make new user
User *new_user = malloc(sizeof(User));
strncpy(new_user->name, name, sizeof(MAX_NAME - 1));
(new_user->name)[MAX_NAME - 1] = '\0';
User *curr = *user_ptr_add;
if (curr == NULL) {
curr = new_user;
new_user->next = NULL;
return 0;
}
while (curr->next != NULL) {
if (strcmp(name, curr->name) == 0) {
return 1;
}
curr = curr->next;
}
curr->next = new_user;
new_user = NULL;
return 0;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-07T22:22:40.387Z | Question from Code | v1 | what does strcmp(name, curr->name) do | int create_user(const char *name, User **user_ptr_add) {
if (strlen(name) >= MAX_NAME) {
return 2;
}
// make new user
User *new_user = malloc(sizeof(User));
strncpy(new_user->name, name, sizeof(MAX_NAME - 1));
(new_user->name)[MAX_NAME - 1] = '\0';
User *curr = *user_ptr_add;
if (curr == NULL) {
curr = new_user;
new_user->next = NULL;
return 0;
}
while (curr->next != NULL) {
if (strcmp(name, curr->name) == 0) {
return 1;
}
curr = curr->next;
}
curr->next = new_user;
new_user = NULL;
return 0;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-08T04:53:26.759Z | Question from Code | v1 | why do I get error with new_post.author = author->name | int make_post(const User *author, User *target, char *contents) {
if (author == NULL || target == NULL) {
return 2;
}
if (check_friends((User *)author, target) == 1) {
return 1;
}
struct post new_post;
new_post.author = author->name;
new_post.contents = contents;
time_t curtime;
new_post.date = &curtime;
new_post.next = target->first_post->next;
target->first_post = &new_post;
return 0;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-08T04:57:44.821Z | Question from Code | v1 | how to fix error for new_post->author = author->name
| int make_post(const User *author, User *target, char *contents) {
if (author == NULL || target == NULL) {
return 2;
}
if (check_friends((User *)author, target) == 1) {
return 1;
}
Post *new_post = malloc(sizeof(Post));
new_post->author = author->name;
new_post->contents = contents;
time_t curtime;
new_post->date = &curtime;
new_post->next = target->first_post->next;
target->first_post = new_post;
return 0;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-08T05:05:09.640Z | Question from Code | v1 | why am i getting segmentation fault | int make_post(const User *author, User *target, char *contents) {
if (author == NULL || target == NULL) {
return 2;
}
if (check_friends((User *)author, target) == 1) {
return 1;
}
Post *new_post = malloc(sizeof(Post));
strcpy(new_post->author, author->name);
new_post->contents = contents;
time_t curtime;
new_post->date = &curtime;
new_post->next = target->first_post->next;
target->first_post = new_post;
return 0;
}
int check_friends(User *author, User *target) {
int friends = 1;
int i = 0;
while (i < MAX_FRIENDS) {
if (author->friends[i] == NULL) {
break;
}
if (strcmp(author->friends[i]->name, target->name) == 0) {
friends = 0;
}
i++;
}
return friends;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-08T05:07:14.885Z | Question from Code | v1 | why am I getting segmentation fault | int make_post(const User *author, User *target, char *contents) {
if (author == NULL || target == NULL) {
return 2;
}
if (check_friends((User *)author, target) == 1) {
return 1;
}
Post *new_post = malloc(sizeof(Post));
strcpy(new_post->author, author->name);
strcpy(new_post->contents, contents);
time_t curtime;
new_post->date = &curtime;
new_post->next = target->first_post->next;
target->first_post = new_post;
return 0;
}
int check_friends(User *author, User *target) {
int friends = 1;
int i = 0;
while (i < MAX_FRIENDS) {
if (author->friends[i] == NULL) {
break;
}
if (strcmp(author->friends[i]->name, target->name) == 0) {
friends = 0;
}
i++;
}
return friends;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-08T05:11:57.321Z | Question from Code | v1 | how to fix error in ew_post->author = malloc(sizeof(char) * MAX_NAME); | int make_post(const User *author, User *target, char *contents) {
if (author == NULL || target == NULL) {
return 2;
}
if (check_friends((User *)author, target) == 1) {
return 1;
}
Post *new_post = malloc(sizeof(Post));
new_post->author = malloc(sizeof(char) * MAX_NAME);
strcpy(new_post->author, author->name);
strcpy(new_post->contents, contents);
time_t curtime;
new_post->date = &curtime;
new_post->next = target->first_post->next;
target->first_post = new_post;
return 0;
}
int check_friends(User *author, User *target) {
int friends = 1;
int i = 0;
while (i < MAX_FRIENDS) {
if (author->friends[i] == NULL) {
break;
}
if (strcmp(author->friends[i]->name, target->name) == 0) {
friends = 0;
}
i++;
}
return friends;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-08T05:13:45.509Z | Question from Code | v1 | error in new_post->author = malloc(MAX_NAME * sizeof(char)); | int make_post(const User *author, User *target, char *contents) {
if (author == NULL || target == NULL) {
return 2;
}
if (check_friends((User *)author, target) == 1) {
return 1;
}
Post *new_post = malloc(sizeof(Post));
new_post->author = malloc(MAX_NAME * sizeof(char));
strcpy(new_post->author, author->name);
strcpy(new_post->contents, contents);
time_t curtime;
new_post->date = &curtime;
new_post->next = target->first_post->next;
target->first_post = new_post;
return 0;
}
int check_friends(User *author, User *target) {
int friends = 1;
int i = 0;
while (i < MAX_FRIENDS) {
if (author->friends[i] == NULL) {
break;
}
if (strcmp(author->friends[i]->name, target->name) == 0) {
friends = 0;
}
i++;
}
return friends;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-12T00:50:28.733Z | Question from Code | v1 | does this work | int check_friends(User *user1, User *user2) {
int friends = 1;
for (int i = 0; i < MAX_FRIENDS; i++) {
if (strcmp((user1->friends[i])->name, user2->name) == 0) {
friends = 0;
break;
}
}
return friends;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-12T00:51:08.355Z | Question from Code | v1 | why am i getting segmentation fault | int check_friends(User *user1, User *user2) {
int friends = 1;
for (int i = 0; i < MAX_FRIENDS; i++) {
if (strcmp((user1->friends[i])->name, user2->name) == 0) {
friends = 0;
break;
}
}
return friends;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-13T01:44:42.104Z | Question from Code | v1 | why do I have unitialised values | void delete_from_friends(User *user) {
for (int i = 0; i < MAX_FRIENDS; i++) {
if (user->friends[i] == NULL) {}
else {
for (int j = 0; j < MAX_FRIENDS; j++) {
User *friends_friend = user->friends[i]->friends[j];
if (friends_friend == NULL) {}
else if (strcmp(friends_friend->name, user->name) == 0) {
user->friends[i]->friends[j] = NULL;
break;
}
}
}
}
} | null | null |
63c647635f004bf4898cf351 | 2023-02-13T01:47:04.905Z | Question from Code | v1 | why do i have an error with if (friends_friend == NULL) {} | void delete_from_friends(User *user) {
for (int i = 0; i < MAX_FRIENDS; i++) {
if (user->friends[i] == NULL) {}
else {
for (int j = 0; j < MAX_FRIENDS; j++) {
User *friends_friend = user->friends[i]->friends[j];
if (friends_friend == NULL) {}
else if (strcmp(friends_friend->name, user->name) == 0) {
user->friends[i]->friends[j] = NULL;
break;
}
}
}
}
} | null | null |
63c647635f004bf4898cf351 | 2023-02-22T00:43:09.546Z | Question from Code | v1 | Is there a segmentation fault in this | Rule *parse_file(FILE *fp) {
// Implement this function and remove the stubbed return statement below.
Rule *first_rule_ptr = NULL;
Rule *last_rule_ptr = NULL;
char str[MAXLINE];
while (fgets(str, MAXLINE, fp) != NULL) {
if (str[0] == ' ' || str[0] == '\t' || str[0] == '\n') {}
else if (is_comment_or_empty(str)) {}
else if (is_target_line(str)) {
Rule *new_rule = init_rule(str);
last_rule_ptr = new_rule;
if (first_rule_ptr == NULL) {first_rule_ptr = new_rule;}
else {insert_rule(&first_rule_ptr, &new_rule);}
} else { // is action line
add_actions(&last_rule_ptr, str);
}
}
fseek(fp, 0, SEEK_SET);
while (fgets(str, MAXLINE, fp) != NULL) {
if (is_target_line(str)) {
add_dependencies(&first_rule_ptr, str);
}
}
return first_rule_ptr;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-22T00:44:31.528Z | Question from Code | v1 | Is there a segmentation fault in this | Rule *init_rule(char *line) {
Rule *new_rule = malloc(sizeof(Rule));
new_rule->dependencies = NULL;
new_rule->actions = NULL;
new_rule->next_rule = NULL;
char *ptr = strtok(line, " :");
new_rule->target = malloc((sizeof(char) * strlen(ptr)) + 1);
strcpy(new_rule->target, ptr);
new_rule->target[strlen(ptr)] = '\0';
return new_rule;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-22T00:45:42.588Z | Question from Code | v1 | Is there a segmentation fault in this | void add_dependencies(Rule **rules_head, char *line) {
char *ptr = strtok((char *)line, " :"); // target name
Rule *curr = *rules_head;
while (curr->next_rule != NULL) {
if (strcmp(curr->target, ptr) == 0) {break;}
else {curr = curr->next_rule;}
}
ptr = strtok(NULL, " ");
while (ptr != NULL) {
Dependency *new_dep = malloc(sizeof(Dependency));
new_dep->rule = find_rule(&curr, ptr);
if (curr->dependencies == NULL) {
curr->dependencies = new_dep;
new_dep->next_dep = NULL;
} else {
new_dep->next_dep = curr->dependencies;
curr->dependencies = new_dep;
}
ptr = strtok(NULL, " ");
}
} | null | null |
63c647635f004bf4898cf351 | 2023-02-22T00:49:50.319Z | Question from Code | v1 | Is there a segmentation fault in this | Rule *find_rule(Rule **rules_ptr, char *name) {
Rule *curr = *rules_ptr;
while(curr->next_rule != NULL) {
if (strcmp(curr->target, name) == 0) {
break;
}
curr = curr->next_rule;
}
if (strcmp(curr->target, name) != 0) { // rule doesn't exist
curr->next_rule = init_rule(name);
curr = curr->next_rule;
}
return curr;
} | null | null |
63c647635f004bf4898cf351 | 2023-02-22T00:57:51.378Z | Question from Code | v1 | Where are the segmentation faults | int is_target_line(const char *line);
Rule *init_rule(char *line);
void insert_rule(Rule **rules_head, Rule **new_rule);
void add_actions(Rule **last_rule_ptr, char *line);
void add_dependencies(Rule **rules_head, char *line);
Rule *find_rule(Rule **rules_ptr, char *name);
/* Read from the open file fp, and create the linked data structure
that represents the Makefile contained in the file.
See the top of pmake.h for the specification of Makefile contents.
*/
Rule *parse_file(FILE *fp) {
// Implement this function and remove the stubbed return statement below.
Rule *first_rule_ptr = NULL;
Rule *last_rule_ptr = NULL;
char str[MAXLINE];
while (fgets(str, MAXLINE, fp) != NULL) {
if (str[0] == ' ' || str[0] == '\t' || str[0] == '\n') {}
else if (is_comment_or_empty(str)) {}
else if (is_target_line(str)) {
Rule *new_rule = init_rule(str);
last_rule_ptr = new_rule;
if (first_rule_ptr == NULL) {first_rule_ptr = new_rule;}
else {insert_rule(&first_rule_ptr, &new_rule);}
} else { // is action line
add_actions(&last_rule_ptr, str);
}
}
fseek(fp, 0, SEEK_SET);
while (fgets(str, MAXLINE, fp) != NULL) {
if (is_target_line(str)) {
add_dependencies(&first_rule_ptr, str);
}
}
return first_rule_ptr;
}
/* Return 1 if the line is a target line, as defined on the assignment handout.
* Return 0 otherwise.
*/
int is_target_line(const char *line) {
if (strstr(line, " : ") != NULL) {
return 1;
}
return 0;
}
/* Initialize a new rule node with the specified target name
* from line (in target line format). Initialize everything else to NULL.
* Return a pointer to this new node.
*/
Rule *init_rule(char *line) {
Rule *new_rule = malloc(sizeof(Rule));
new_rule->dependencies = NULL;
new_rule->actions = NULL;
new_rule->next_rule = NULL;
new_rule->target = NULL;
char *ptr = strtok(line, " :");
new_rule->target = malloc((sizeof(char) * strlen(ptr)) + 1);
strcpy(new_rule->target, ptr);
new_rule->target[strlen(ptr)] = '\0';
return new_rule;
}
/* Add dependencies to target from line (in target line format).
* Point each dependency to its corresponding rule node in the
* rules list pointed to by rules_head.
*/
void add_dependencies(Rule **rules_head, char *line) {
char *ptr = strtok((char *)line, " :"); // target name
Rule *curr = *rules_head;
while (curr->next_rule != NULL) {
if (strcmp(curr->target, ptr) == 0) {break;}
else {curr = curr->next_rule;}
}
ptr = strtok(NULL, " ");
while (ptr != NULL) {
Dependency *new_dep = malloc(sizeof(Dependency));
new_dep->rule = NULL;
new_dep->next_dep = NULL;
new_dep->rule = find_rule(&curr, ptr);
if (curr->dependencies == NULL) {
curr->dependencies = new_dep;
new_dep->next_dep = NULL;
} else {
new_dep->next_dep = curr->dependencies;
curr->dependencies = new_dep;
}
ptr = strtok(NULL, " ");
}
}
/* Return the rule node with the given target name
* in the rules list pointed to by rules_ptr.
* If no such rule exists, create it and return it.
*/
Rule *find_rule(Rule **rules_ptr, char *name) {
Rule *curr = *rules_ptr;
while(curr->next_rule != NULL) {
if (strcmp(curr->target, name) == 0) {
break;
}
curr = curr->next_rule;
}
if (strcmp(curr->target, name) != 0) { // rule doesn't exist
curr->next_rule = init_rule(name);
curr = curr->next_rule;
}
return curr;
}
/* Insert the new rule to the tail of the rules list pointed to
* by rules_head.
*
* Precondition: rules list pointed to by rules_head is not empty
*/
void insert_rule(Rule **rules_head, Rule **new_rule) {
Rule *curr = *rules_head;
while (curr->next_rule != NULL) {
curr = curr->next_rule;
}
curr->next_rule = *new_rule;
}
/* Add actions in line (in action line format) to
* the rule node pointed to by last_rule_ptr
*/
void add_actions(Rule **last_rule_ptr, char *line) {} | null | null |
63c647645f004bf4898cf35b | 2023-01-25T21:27:31.768Z | Explain Code | v1 | null | void fib(int **fib_sequence, int count){
*fib_sequence = malloc(sizeof(int)*count);
if (count == 1) {
*fib_sequence[0] = 0;
} else {
*fib_sequence[0] = 0;
*fib_sequence[1] = 1;
for (int i = 2; i < count; i++) {
*fib_sequence[i] = *fib_sequence[i-2] + *fib_sequence[i-1];
}
}
} | null | null |
63c647645f004bf4898cf35b | 2023-01-25T21:28:35.214Z | General Question | v1 | why do I get a segmentation fault | null | null | null |
63c647645f004bf4898cf35b | 2023-01-25T21:30:17.991Z | Help Fix Code | v1 | null | void fib(int **fib_sequence, int count){
*fib_sequence = malloc(sizeof(int)*count);
if (count == 1) {
*fib_sequence[0] = 0;
} else {
*fib_sequence[0] = 0;
*fib_sequence[1] = 1;
for (int i = 2; i < count; i++) {
*fib_sequence[i] = *fib_sequence[i-2] + *fib_sequence[i-1];
}
}
} | generate the first n values in the Fibonacci sequence
| null |
63c647645f004bf4898cf35b | 2023-01-25T21:36:05.238Z | Help Fix Code | v1 | null | void fib(int **fib_sequence, int count){
int *cur = *fib_sequence
cur = malloc(sizeof(int)*count);
if (count == 1) {
cur[0] = 0;
} else {
cur[0] = 0;
cur[1] = 1;
for (int i = 2; i < count; i++) {
cur[i] = cur[i-2] + cur[i-1];
}
}
} | generate the first n values in the Fibonacci sequence | null |
63c647645f004bf4898cf35b | 2023-01-25T21:37:03.455Z | Help Fix Code | v1 | null | void fib(int **fib_sequence, int count){
int *cur = *fib_sequence
cur = malloc(sizeof(int)*count);
if (count == 1) {
*cur[0] = 0;
} else {
*cur[0] = 0;
*cur[1] = 1;
for (int i = 2; i < count; i++) {
*cur[i] = *cur[i-2] + *cur[i-1];
}
}
} | generate the first n values in the Fibonacci sequence | null |
63c647645f004bf4898cf35b | 2023-01-25T21:38:00.702Z | Help Fix Code | v1 | null | void fib(int **fib_sequence, int count){
int *cur = *fib_sequence
cur = malloc(sizeof(int)*count);
if (count == 1) {
cur[0] = 0;
} else {
cur[0] = 0;
cur[1] = 1;
for (int i = 2; i < count; i++) {
cur[i] = *cur[i-2] + *cur[i-1];
}
}
} | generate the first n values in the Fibonacci sequence | null |
63c647645f004bf4898cf35b | 2023-01-25T21:39:23.197Z | Help Fix Code | v1 | null | void fib(int **fib_sequence, int count){
int *cur = *fib_sequence
*cur = malloc(sizeof(int)*count);
if (count == 1) {
cur[0] = 0;
} else {
cur[0] = 0;
cur[1] = 1;
for (int i = 2; i < count; i++) {
cur[i] = cur[i-2] + cur[i-1];
}
}
} | generate the first n values in the Fibonacci sequence | null |
63c647645f004bf4898cf35b | 2023-01-25T21:40:29.438Z | Help Fix Code | v1 | null | void fib(int **fib_sequence, int count){
int *cur = **fib_sequence
cur = malloc(sizeof(int)*count);
if (count == 1) {
cur[0] = 0;
} else {
cur[0] = 0;
cur[1] = 1;
for (int i = 2; i < count; i++) {
cur[i] = cur[i-2] + cur[i-1];
}
}
} | generate the first n values in the Fibonacci sequence | null |
63c647645f004bf4898cf35b | 2023-01-30T21:59:11.935Z | Help Fix Code | v1 | null | int populate_array(int sin, int *sin_array) {
for (int i = 8; i >= 0; i--){
sin_array[i] = sin % 10;
sin = sin / 10;
}
if (sin != 0) {
return 1;
}
else {
return 0;
}
} | It takes an integer and an integer array as its arguments, and returns an integer. This function's job is to populate the given integer array so that it contains the 9 digits of the given integer, in the same order as in the integer. | null |
63c647645f004bf4898cf35b | 2023-01-30T22:00:26.564Z | Help Fix Code | v1 | null | int populate_array(int sin, int *sin_array) {
for (int i = 8; i >= 0; i--){
sin_array[i] = sin % 10;
sin = sin / 10;
}
if (sin == 0) {
return 0;
}
else {
return 1;
}
} | It takes an integer and an integer array as its arguments, and returns an integer. This function's job is to populate the given integer array so that it contains the 9 digits of the given integer, in the same order as in the integer. | null |
63c647645f004bf4898cf35b | 2023-01-30T22:19:32.496Z | Help Fix Code | v1 | null | int check_sin(int *sin_array) {
int sin_total = 0;
for (int i = 0; i < 9; i++){
if (i % 2 == 0){
int result = sin_array[i] * 2; //multiplies every second digit by 2
if (result >= 10) {
sin_total += 1 + (result % 10);
}
else {
sin_total += result;
}
}
else {
sin_total += sin_array[i];
}
}
if (sin_total % 10 == 0){
return 0;
} else {
return 1;
}
} | it takes an 9 element integer array representing a candidate SIN number. It returns 0 if the number given is a valid Canadian SIN number, and 1 otherwise. | null |
63c647645f004bf4898cf35b | 2023-02-10T21:56:14.388Z | Explain Code | v1 | null | User *find_user(const char *name, const User *head) {
User *curr_user = (User *) head;
while (curr_user != NULL) {
if (strcmp(curr_user->name, name) == 0) {
return curr_user;
}
}
return NULL;
} | null | null |
63c647645f004bf4898cf35b | 2023-02-10T22:09:34.049Z | Explain Code | v1 | null | void list_users(const User *curr) {
User *curr_user = (User *) curr;
while (curr_user != NULL) {
printf("%s\n", curr_user->name);
curr_user = curr_user->next;
}
} | null | null |
63c647645f004bf4898cf35b | 2023-02-14T19:06:00.310Z | General Question | v1 | how to determine the number of elements in an array | null | null | null |
63c647645f004bf4898cf35b | 2023-02-15T04:49:52.485Z | General Question | v1 | Do we have to assign values to all attributes of a struct when creating a new instance of it | null | null | null |
63c647645f004bf4898cf35b | 2023-02-15T21:10:37.196Z | General Question | v1 | when allocating space for a next pointer in a linked list struct what is the size of the allocation | null | null | null |
63c647645f004bf4898cf35b | 2023-02-17T04:06:47.317Z | Explain Code | v1 | null | char *copy(char *dest, const char *src, int capacity) {
int null_count = 0;
for (int i = 0; i < capacity; i++) {
if (src[i] == '\0') { // When src is less than or equal to capacity to be copied
null_count += (capacity - i);
break;
}
}
if (null_count != 0) {
for (int j = 0; j < capacity - null_count; j++) {
dest[j] = src[j];
}
for (int k = capacity - null_count; k < capacity; k++) {
dest[k] = '\0';
}
}
else {
for (int j = 0; j < capacity - 1; j++) {
dest[j] = src[j];
}
dest[capacity - 1] = '\0';
}
for (int i = 0; i < capacity && src[i] != '\0'; i++) {
dest[i] = src[i];
for ( ; i < capacity; i++) {
dest[i] = '\0';
}
}
return dest;
}
| null | null |
63c647645f004bf4898cf35b | 2023-02-17T04:09:24.340Z | Explain Code | v1 | null | char *copy(char *dest, const char *src, int capacity) {
for (int i = 0; i < capacity && src[i] != '\0'; i++) {
dest[i] = src[i];
for ( ; i < capacity; i++) {
dest[i] = '\0';
}
}
return dest;
} | null | null |
63c647645f004bf4898cf35b | 2023-02-17T04:10:50.648Z | Explain Code | v1 | null | char *copy(char *dest, const char *src, int capacity) {
int null_count = 0;
for (int i = 0; i < capacity; i++) {
if (src[i] == '\0') { // When src is less than or equal to capacity to be copied
null_count += (capacity - i);
break;
}
}
if (null_count != 0) {
for (int j = 0; j < capacity - null_count; j++) {
dest[j] = src[j];
}
for (int k = capacity - null_count; k < capacity; k++) {
dest[k] = '\0';
}
}
else {
for (int j = 0; j < capacity - 1; j++) {
dest[j] = src[j];
}
dest[capacity - 1] = '\0';
}
} | null | null |
63c647645f004bf4898cf35b | 2023-02-28T04:01:01.804Z | General Question | v1 | is the sizeof(int**) equal to sizeof(int*)
| null | null | null |
63c647645f004bf4898cf35b | 2023-03-08T18:27:19.096Z | Help Write Code | v1 | null | null | null | Get parent process to wait for all child process to complete |
63c647645f004bf4898cf35b | 2023-04-02T19:38:32.471Z | General Question | v2 | when a message with newlines is sent to a client from a server should the message end with one network newline or does the network newline replace all newline characters in the message | null | null | null |
63c647645f004bf4898cf35b | 2023-04-06T17:22:07.297Z | General Question | v2 | When to use memset vs when to malloc | null | null | null |
63c647645f004bf4898cf35b | 2023-04-06T20:39:25.321Z | General Question | v2 | how to copy a char array to a char pointer | null | null | null |
63c647645f004bf4898cf35b | 2023-04-06T23:45:58.815Z | General Question | v2 | how to use select | null | null | null |
63c647645f004bf4898cf35b | 2023-04-24T02:38:51.049Z | Help Fix Code | v2 | print list | int *make_list() {
int list[3] = {1, 2, 3};
return list;
}
int main() {
int *l = make_list();
int i;
for (i = 0; i < 3; i++) {
printf("%d\n", l[i]);
}
return 0;
} | null | null |
63c647645f004bf4898cf35b | 2023-04-24T02:48:05.134Z | General Question | v2 | does initializing a char array include the null terminator | null | null | null |
63c647645f004bf4898cf35b | 2023-04-24T02:51:51.169Z | Help Fix Code | v2 | store literal dynamically | char *word = malloc(6 * sizeof(char));
*word = "hello"; | null | null |
63c647645f004bf4898cf35b | 2023-04-24T17:54:28.518Z | General Question | v2 | can strcpy alter string literal | null | null | null |
63c647645f004bf4898cf35b | 2023-04-24T20:11:20.699Z | General Question | v2 | how to guarantee order of output for child processes when forking | null | null | null |
63c647645f004bf4898cf35b | 2023-04-25T03:31:11.151Z | Explain Code | v2 | null | #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
int main(int argc, char **argv) {
int ret;
int sum = 0;
int status;
for (int i = 1; i < argc; i++) {
ret = fork();
if (ret < 0) {
perror("fork");
exit(1);
} else if (ret == 0) {
int len = strlen(argv[i]);
printf("I am child %d and I'm returning %d\n", i, len);
exit(len);
}
}
for (int i = 1; i < argc; i++) {
if ((ret = wait(&status)) == -1) {
perror("wait");
exit(1);
}
if (WIFEXITED(status)) {
sum += WEXITSTATUS(status);
}
}
printf("The length of all the args is %d\n", sum);
return 0;
} | null | null |
63c647645f004bf4898cf35b | 2023-04-25T03:35:19.295Z | General Question | v2 | what is dup2 used for | null | null | null |
63c647645f004bf4898cf35b | 2023-04-25T21:39:20.796Z | Help Fix Code | v2 | print hello world | char *s = "hello world";
char *t = malloc(sizeof(s));
strcpy(t, s);
printf("%s", t); | null | null |
63c647645f004bf4898cf35b | 2023-04-25T21:42:09.850Z | Question from Code | v2 | what happens if we use sizeof(s) in malloc instead of strlen(s) + 1
| char *s = "hello world";
char *t = malloc(sizeof(s));
strcpy(t, s);
printf("%s", t); | null | null |
63c647665f004bf4898cf36f | 2023-03-02T03:02:51.468Z | Question from Code | v1 | modify the program so that the new children do not create additional processes. Only the original parent calls fork. Keep the printf call for all processes. | #include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
int main(int argc, char **argv) {
if (argc != 2) {
fprintf(stderr, "Usage: forkloop <iterations>\n");
exit(1);
}
int iterations = strtol(argv[1], NULL, 10);
for (int i = 0; i < iterations; i++) {
int n = fork();
if (n < 0) {
perror("fork");
exit(1);
}
printf("ppid = %d, pid = %d, i = %d\n", getppid(), getpid(), i);
}
return 0;
}
| null | null |
63c647665f004bf4898cf36f | 2023-03-02T03:04:17.403Z | Help Fix Code | v1 | null | #include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
int main(int argc, char **argv) {
if (argc != 2) {
fprintf(stderr, "Usage: forkloop <iterations>\n");
exit(1);
}
int iterations = strtol(argv[1], NULL, 10);
for (int i = 0; i < iterations; i++) {
int n = fork();
if (n < 0) {
perror("fork");
exit(1);
}
printf("ppid = %d, pid = %d, i = %d\n", getppid(), getpid(), i);
}
return 0;
}
| modify the program so that the new children do not create additional processes. Only the original parent calls fork. Keep the printf call for all processes. | null |
63c647665f004bf4898cf36f | 2023-03-02T03:06:20.878Z | Question from Code | v1 | modify the program so that the new children do not create additional processes. Only the original parent calls fork ITERATIONS times. Keep the printf call for all processes. | #include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
int main(int argc, char **argv) {
if (argc != 2) {
fprintf(stderr, "Usage: forkloop <iterations>\n");
exit(1);
}
int iterations = strtol(argv[1], NULL, 10);
for (int i = 0; i < iterations; i++) {
int n = fork();
if (n < 0) {
perror("fork");
exit(1);
}
printf("ppid = %d, pid = %d, i = %d\n", getppid(), getpid(), i);
}
return 0;
}
| null | null |
63c647665f004bf4898cf36f | 2023-03-14T01:27:57.390Z | General Question | v2 | how to fork children processes in parallel and make the parent wait for all the childern
| null | null | null |
63c647665f004bf4898cf36f | 2023-03-14T01:30:03.763Z | Help Write Code | v2 | null | null | null | fork 5 child proccess in parallel and make the parent process wait until all child processes have terminated |
63c647665f004bf4898cf36f | 2023-03-14T02:21:51.085Z | General Question | v2 | how to fork childern sequentially and not in parallel | null | null | null |
63c647665f004bf4898cf36f | 2023-03-14T04:24:42.482Z | General Question | v2 | execvp: No such file or directory why am i getting this error | null | null | null |
63c647665f004bf4898cf374 | 2023-01-22T06:21:22.141Z | Question from Code | v1 | Why does this compiling and executing this result in a segmentation fault? | int main(int argc, char **argv) {
// TODO: Verify that command line arguments are valid.
if (argc != 2) {
return 2; //returning with code 2
}
// TODO: Parse arguments and then call the two helpers in sin_helpers.c
// to verify the SIN given as a command line argument.
int sin_number = strtol(argv[1], NULL, 10);
int sin_array[9];
if (populate_array(sin_number, sin_array) == 0) { //the parsed argument was a 9 digit integer
if (check_sin(sin_array) == 0) { //in addition, if valid sin number then
printf("Valid SIN\n");
return 0;
}
else {
printf("Invalid SIN\n");
return 1;
}
}
return 0;
} | null | null |
63c647665f004bf4898cf374 | 2023-01-22T06:23:39.600Z | Question from Code | v1 | Does calling this function with appropriate parameters result in a segmentation fault? | int populate_array(int sin, int *sin_array) {
//setting up dummy variables to test whether sin is a 9 digit in
int dummy = sin;
int count = 0;
while (dummy != 0) {
dummy = dummy / 10;
count = count + 1;
}
if (count != 9) { //10 didn't divide into sin exactly 9 times, thus the number is not a 9 digit int
return 1;
}
else{
for (int i = 8; i >= 0; i--) { //sin is a 9 digit int, so populate array
sin_array[i] = sin % 10;
sin = sin / 10;
}
return 0;
}
} | null | null |
63c647665f004bf4898cf374 | 2023-01-22T06:36:16.925Z | Question from Code | v1 | Will executing main result in a segmentation fault? | #include <stdio.h>
int check_sin(int *sin_array) {
if (sin_array[0] == 0) { //assignment simplification: if it starts with 0 its invalid
return 0;
}
else {
int result[9];
int sum = 0;
for (int i = 0; i < 9; i++) {
if (i % 2 == 0) {
//even indices get multiplied by 1
result[i] = sin_array[i]; //the result at i is just going to be the digit since i * 1 = i
}
else {
//odd indices get multiplied by 2, and if its a 2 digit number than add the 2 digits and output it to result[i]
result[i] = ((sin_array[i] * 2) / 10) + ((sin_array[i] * 2) % 10);
//if the product is < 10, the division is 0 and the modulo will be the digit, so the sum is just the digit
//if the product is >= 10, the division is the first digit of the product, the modulo is the second, so the sum
//are the added digits
}
}
for (int i = 0; i < 9; i++) {
sum = sum + result[i];
}
if (sum % 10 == 0) {
return 0;
}
return 1;
}
}
int main() {
int sin_array[9] = {8, 1, 0, 6, 2, 0, 7, 1, 6};
printf("%d/n", check_sin(sin_array));
}
| null | null |
63c647665f004bf4898cf374 | 2023-01-22T06:39:17.378Z | Question from Code | v1 | Does executing main result in a segmentation fault? | #include <stdio.h>
int populate_array(int sin, int *sin_array) {
//setting up dummy variables to test whether sin is a 9 digit in
int dummy = sin;
int count = 0;
while (dummy != 0) {
dummy = dummy / 10;
count = count + 1;
}
if (count != 9) { //10 didn't divide into sin exactly 9 times, thus the number is not a 9 digit int
return 1;
}
else{
for (int i = 8; i >= 0; i--) { //sin is a 9 digit int, so populate array
sin_array[i] = sin % 10;
sin = sin / 10;
}
return 0;
}
}
int main() {
int sin_array[9];
printf("%d/n", check_sin(sin_array));
}
| null | null |
63c647665f004bf4898cf374 | 2023-01-22T06:40:04.712Z | Question from Code | v1 | Does executing this code result in a segmentation fault? | #include <stdio.h>
int populate_array(int sin, int *sin_array) {
//setting up dummy variables to test whether sin is a 9 digit in
int dummy = sin;
int count = 0;
while (dummy != 0) {
dummy = dummy / 10;
count = count + 1;
}
if (count != 9) { //10 didn't divide into sin exactly 9 times, thus the number is not a 9 digit int
return 1;
}
else{
for (int i = 8; i >= 0; i--) { //sin is a 9 digit int, so populate array
sin_array[i] = sin % 10;
sin = sin / 10;
}
return 0;
}
}
int main() {
int sin_array[9];
printf("%d/n", populate_array(sin_array));
}
| null | null |
63c647665f004bf4898cf374 | 2023-01-22T06:41:09.042Z | Question from Code | v1 | Does executing this code result in a segmentation fault? | #include <stdio.h>
int populate_array(int sin, int *sin_array) {
//setting up dummy variables to test whether sin is a 9 digit in
int dummy = sin;
int count = 0;
while (dummy != 0) {
dummy = dummy / 10;
count = count + 1;
}
if (count != 9) { //10 didn't divide into sin exactly 9 times, thus the number is not a 9 digit int
return 1;
}
else{
for (int i = 8; i >= 0; i--) { //sin is a 9 digit int, so populate array
sin_array[i] = sin % 10;
sin = sin / 10;
}
return 0;
}
}
int main() {
int sin_array[9];
printf("%d/n", populate_array(810620716, sin_array));
}
| null | null |
63c647665f004bf4898cf374 | 2023-01-22T06:51:03.766Z | Question from Code | v1 | Why does executing this produce a segmentation fault? | #include <stdio.h>
int populate_array(int sin, int *sin_array) {
//setting up dummy variables to test whether sin is a 9 digit in
int dummy = sin;
int count = 0;
while (dummy != 0) {
dummy = dummy / 10;
count = count + 1;
}
if (count != 9) { //10 didn't divide into sin exactly 9 times, thus the number is not a 9 digit int
return 1;
}
else{
for (int i = 8; i >= 0; i--) { //sin is a 9 digit int, so populate array
sin_array[i] = sin % 10;
sin = sin / 10;
}
return 0;
}
}
int main() {
int sin_array[9];
printf("%d/n", check_sin(sin_array));
}
Yes, because the populate_array function is not called.
Will executing main result in a segmentation fault?
#include <stdio.h>
int check_sin(int *sin_array) {
if (sin_array[0] == 0) { //assignment simplification: if it starts with 0 its invalid
return 0;
}
else {
int result[9];
int sum = 0;
for (int i = 0; i < 9; i++) {
if (i % 2 == 0) {
//even indices get multiplied by 1
result[i] = sin_array[i]; //the result at i is just going to be the digit since i * 1 = i
}
else {
//odd indices get multiplied by 2, and if its a 2 digit number than add the 2 digits and output it to result[i]
result[i] = ((sin_array[i] * 2) / 10) + ((sin_array[i] * 2) % 10);
//if the product is < 10, the division is 0 and the modulo will be the digit, so the sum is just the digit
//if the product is >= 10, the division is the first digit of the product, the modulo is the second, so the sum
//are the added digits
}
}
for (int i = 0; i < 9; i++) {
sum = sum + result[i];
}
if (sum % 10 == 0) {
return 0;
}
return 1;
}
}
int main() {
int sin_array[9] = {8, 1, 0, 6, 2, 0, 7, 1, 6};
printf("%d/n", check_sin(sin_array));
}
| null | null |
63c647665f004bf4898cf374 | 2023-01-22T06:52:22.825Z | Question from Code | v1 | Why does running this produce a segmentation fault? | #include <stdio.h>
int check_sin(int *sin_array) {
if (sin_array[0] == 0) { //assignment simplification: if it starts with 0 its invalid
return 0;
}
else {
int result[9];
int sum = 0;
for (int i = 0; i < 9; i++) {
if (i % 2 == 0) {
//even indices get multiplied by 1
result[i] = sin_array[i]; //the result at i is just going to be the digit since i * 1 = i
}
else {
//odd indices get multiplied by 2, and if its a 2 digit number than add the 2 digits and output it to result[i]
result[i] = ((sin_array[i] * 2) / 10) + ((sin_array[i] * 2) % 10);
//if the product is < 10, the division is 0 and the modulo will be the digit, so the sum is just the digit
//if the product is >= 10, the division is the first digit of the product, the modulo is the second, so the sum
//are the added digits
}
}
for (int i = 0; i < 9; i++) {
sum = sum + result[i];
}
if (sum % 10 == 0) {
return 0;
}
return 1;
}
}
int main() {
int sin_array[9] = {8, 1, 0, 6, 2, 0, 7, 1, 6};
printf("%d/n", check_sin(sin_array));
}
| null | null |
63c647665f004bf4898cf374 | 2023-01-22T06:54:07.434Z | Help Fix Code | v1 | null | #include <stdio.h>
int check_sin(int *sin_array) {
if (sin_array[0] == 0) { //assignment simplification: if it starts with 0 its invalid
return 0;
}
else {
int result[9];
int sum = 0;
for (int i = 0; i < 9; i++) {
if (i % 2 == 0) {
//even indices get multiplied by 1
result[i] = sin_array[i]; //the result at i is just going to be the digit since i * 1 = i
}
else {
//odd indices get multiplied by 2, and if its a 2 digit number than add the 2 digits and output it to result[i]
result[i] = ((sin_array[i] * 2) / 10) + ((sin_array[i] * 2) % 10);
//if the product is < 10, the division is 0 and the modulo will be the digit, so the sum is just the digit
//if the product is >= 10, the division is the first digit of the product, the modulo is the second, so the sum
//are the added digits
}
}
for (int i = 0; i < 9; i++) {
sum = sum + result[i];
}
if (sum % 10 == 0) {
return 0;
}
return 1;
}
}
int main() {
int sin_array[9] = {8, 1, 0, 6, 2, 0, 7, 1, 6};
printf("%d/n", check_sin(sin_array));
}
| Outputs 1 | null |
63c647665f004bf4898cf374 | 2023-01-22T06:56:43.358Z | Question from Code | v1 | Why does running this result in a segmentation fault? | #include <stdio.h>
int check_sin(int *sin_array) {
if (sin_array[0] == 0) { //assignment simplification: if it starts with 0 its invalid
return 1;
}
else {
int result[9];
int sum = 0;
for (int i = 0; i < 9; i++) {
if (i % 2 == 0) {
//even indices get multiplied by 1
result[i] = sin_array[i]; //the result at i is just going to be the digit since i * 1 = i
}
else {
//odd indices get multiplied by 2, and if its a 2 digit number than add the 2 digits and output it to result[i]
result[i] = ((sin_array[i] * 2) / 10) + ((sin_array[i] * 2) % 10);
//if the product is < 10, the division is 0 and the modulo will be the digit, so the sum is just the digit
//if the product is >= 10, the division is the first digit of the product, the modulo is the second, so the sum
//are the added digits
}
}
for (int i = 0; i < 9; i++) {
sum = sum + result[i];
}
if (sum % 10 == 0) {
return 0;
}
return 1;
}
}
int main() {
int sin_array[9] = {8, 1, 0, 6, 2, 0, 7, 1, 6};
printf("%d/n", check_sin(sin_array));
}
| null | null |
63c647665f004bf4898cf374 | 2023-04-23T00:17:23.387Z | Question from Code | v2 | Would the lines of code compile and execute without error always? | int x;
int *p = &x;
printf("%d\n", *p); | null | null |
63c647665f004bf4898cf374 | 2023-04-23T00:19:52.704Z | Question from Code | v2 | Would the code compile and execute without error all the time? | char arr[11] = "Basket";
strcat(arr, "ball");
printf("%s\n", arr); | null | null |
63c647665f004bf4898cf374 | 2023-04-23T00:28:26.919Z | Question from Code | v2 | Would this code always compile and execute without error? | char str[] = "CSC209";
char *s = "CSC209S";
s[6] = '\0';
printf("%d\n", strcmp(str, s)); | null | null |
63c647665f004bf4898cf374 | 2023-04-23T00:50:03.928Z | Question from Code | v2 | Does this code always compile and run without error | char *get_extension(char •str) {
char ext[4];
char *p;
if ((p = strchr(str, '.')) != NULL) {
strncpy(ext, p, 4);
ext[3] = '\0';
return ext;
} else {
return NULL;
}
}
printf("%s\n", get_extension("run.c")); | null | null |
63c647665f004bf4898cf374 | 2023-04-23T00:51:58.020Z | Question from Code | v2 | Does running this code cause any errors such as segmentation fault | char *get_extension(char *str) {
char ext[4];
char *p;
if ((p = strchr(str, '.')) != NULL) {
strncpy(ext, p, 4);
ext[3] = '\0';
return ext;
} else {
return NULL;
}
}
printf("%s\n", get_extension("run.c")); | null | null |
63c647675f004bf4898cf37e | 2023-02-14T19:02:19.184Z | Help Fix Code | v1 | null |
int create_user(const char *name, User **user_ptr_add) {
// Checks if the name fits into the array.
if (strlen(name) >= MAX_NAME) {
return 2;
} else (
User *curr = *user_ptr_add;
User *next = curr -> next;
// While loop to check if the name is already in the list.
while (next != NULL) {
if (strcmp(name, curr->name) == 0) {
curr = curr -> next;
next = curr -> next;
} else {
return 1;
}
}
// Creates the new user and adds it to the list.
User *new_user = malloc(sizeof(User));
strcpy(new_user -> name, name);
curr->next = new_user;
new_user->next = NULL;
)
return -1;
} | /*
* Create a new user with the given name. Insert it at the tail of the list
* of users whose head is pointed to by *user_ptr_add.
*
* Return:
* - 0 if successful
* - 1 if a user by this name already exists in this list
* - 2 if the given name cannot fit in the 'name' array
* (don't forget about the null terminator)
*/ | null |
63c647675f004bf4898cf37e | 2023-02-14T19:04:12.190Z | Help Fix Code | v1 | null | User *find_user(const char *name, const User *head) {
const User *curr = head;
while (curr != NULL) {
if (strcmp(curr->name, name) == 0) {
curr = curr -> next;
} else {
return &curr;
}
}
return NULL;
}
| /*
* Return a pointer to the user with this name in
* the list starting with head. Return NULL if no such user exists.
*
* NOTE: You'll likely need to cast a (const User *) to a (User *)
* to satisfy the prototype without warnings.
*/ | null |
63c647675f004bf4898cf37e | 2023-02-14T19:08:05.009Z | Help Fix Code | v1 | null | User *find_user(const char *name, const User *head) {
const User *curr = head;
while (curr != NULL) {
if (strcmp(curr->name, name) == 0) {
curr = curr -> next;
} else {
return curr;
}
}
return NULL;
} | /*
* Return a pointer to the user with this name in
* the list starting with head. Return NULL if no such user exists.
*
* NOTE: You'll likely need to cast a (const User *) to a (User *)
* to satisfy the prototype without warnings.
*/ | null |
63c647675f004bf4898cf37e | 2023-02-14T23:06:09.413Z | Question from Code | v1 | Why is my code giving a segmentation fault? | #define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
/*
* Create a new user with the given name. Insert it at the tail of the list
* of users whose head is pointed to by *user_ptr_add.
*
* Return:
* - 0 if successful
* - 1 if a user by this name already exists in this list
* - 2 if the given name cannot fit in the 'name' array
* (don't forget about the null terminator)
*/
int create_user(const char *name, User **user_ptr_add) {
// Checks if the name fits into the array.
if (strlen(name) >= MAX_NAME) {
return 2;
} else {
User *curr = *user_ptr_add;
User *next = curr -> next;
// While loop to check if the name is already in the list.
while (next != NULL) {
if (strcmp(name, next->name) != 0) {
curr = curr -> next;
next = curr -> next;
} else {
return 1;
}
}
// Creates the new user and adds it to the list.
User *new_user = malloc(sizeof(User));
strcpy(new_user -> name, name);
strcpy(new_user->profile_pic, "");
curr->next = new_user;
new_user->next = NULL;
return 0;
}
}
| null | null |
63c647675f004bf4898cf37e | 2023-02-14T23:07:27.395Z | Question from Code | v1 | why is this giving me a segmentation fault | #define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
/*
* Create a new user with the given name. Insert it at the tail of the list
* of users whose head is pointed to by *user_ptr_add.
*
* Return:
* - 0 if successful
* - 1 if a user by this name already exists in this list
* - 2 if the given name cannot fit in the 'name' array
* (don't forget about the null terminator)
*/
int create_user(const char *name, User **user_ptr_add) {
// Checks if the name fits into the array.
if (strlen(name) >= MAX_NAME) {
return 2;
} else {
User *curr = *user_ptr_add;
User *next = curr -> next;
// While loop to check if the name is already in the list.
while (next != NULL) {
if (strcmp(name, next->name) != 0) {
curr = curr -> next;
next = curr -> next;
} else {
return 1;
}
}
// Creates the new user and adds it to the list.
User *new_user = malloc(sizeof(User));
strcpy(new_user -> name, name);
curr->next = new_user;
new_user->next = NULL;
return 0;
}
}
| null | null |
63c647675f004bf4898cf37e | 2023-02-14T23:14:30.147Z | Explain Code | v1 | null | #define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
/*
* Create a new user with the given name. Insert it at the tail of the list
* of users whose head is pointed to by *user_ptr_add.
*
* Return:
* - 0 if successful
* - 1 if a user by this name already exists in this list
* - 2 if the given name cannot fit in the 'name' array
* (don't forget about the null terminator)
*/
int create_user(const char *name, User **user_ptr_add) {
// Checks if the name fits into the array.
if (strlen(name) >= MAX_NAME) {
return 2;
} else {
User *curr = *user_ptr_add;
User *next = curr -> next;
// Creates the new user and adds it to the list.
User *new_user = malloc(sizeof(User));
strcpy(new_user -> name, name);
if (curr == NULL) {
curr = new_user;
new_user->next = NULL;
} else if (strcmp(name, curr->name) == 0) {
return 1;
}
// While loop to check if the name is already in the list.
while (next != NULL) {
if (strcmp(name, next->name) != 0) {
curr = curr -> next;
next = curr -> next;
} else {
return 1;
}
}
curr->next = new_user;
new_user->next = NULL;
return 0;
}
} | null | null |
63c647675f004bf4898cf37e | 2023-02-14T23:15:04.222Z | Question from Code | v1 | why is this giving me a segmentation fault? | #define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
/*
* Create a new user with the given name. Insert it at the tail of the list
* of users whose head is pointed to by *user_ptr_add.
*
* Return:
* - 0 if successful
* - 1 if a user by this name already exists in this list
* - 2 if the given name cannot fit in the 'name' array
* (don't forget about the null terminator)
*/
int create_user(const char *name, User **user_ptr_add) {
// Checks if the name fits into the array.
if (strlen(name) >= MAX_NAME) {
return 2;
} else {
User *curr = *user_ptr_add;
User *next = curr -> next;
// Creates the new user and adds it to the list.
User *new_user = malloc(sizeof(User));
strcpy(new_user -> name, name);
if (curr == NULL) {
curr = new_user;
new_user->next = NULL;
} else if (strcmp(name, curr->name) == 0) {
return 1;
}
// While loop to check if the name is already in the list.
while (next != NULL) {
if (strcmp(name, next->name) != 0) {
curr = curr -> next;
next = curr -> next;
} else {
return 1;
}
}
curr->next = new_user;
new_user->next = NULL;
return 0;
}
} | null | null |
63c647675f004bf4898cf37e | 2023-02-15T09:08:50.730Z | Question from Code | v1 | WHY AM I GETTING A SEGMENTATION FAULT
| #define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int print_user(const User *user) {
if (user == NULL) {
return 1;
} else {
// Print the profile_pic
FILE *profile_pic;
profile_pic = fopen(user->profile_pic, "r");
char line[100];
if (profile_pic != NULL) {
while (fgets(line, 100, profile_pic) != NULL) {
printf("%s", line);
}
}
fclose(profile_pic);
// Prints the name
printf("\nName: %s\n", user->name);
printf("------------------------------------------\n");
// Prints the friends
printf("Friends:\n");
for (int i=0; i < MAX_FRIENDS; i++) {
if (user->friends[i] != NULL) {
printf("%s\n", user->friends[i]->name);
}
}
printf("------------------------------------------\n");
return 0;
}
} | null | null |
63c647675f004bf4898cf37e | 2023-02-15T09:29:12.204Z | Question from Code | v1 | why am i getting a segmentation fault (core dumped) | #define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int create_user(const char *name, User **user_ptr_add) {
User *curr = *user_ptr_add;
User *new_user = malloc(sizeof(User));
// Check if memory allocation was successful; exits if not.
if (new_user == NULL) {
exit(1);
}
if (strlen(name) >= MAX_NAME) {
free(new_user);
return 2;
} else if (curr == NULL) {
*user_ptr_add = new_user;
new_user->next = *user_ptr_add;
} else {
User *next = curr -> next;
// While loop to check if the name is already in the list.
while (next != NULL) {
if (strcmp(name, next->name) != 0) {
curr = next;
next = curr -> next;
} else {
free(new_user);
return 1;
}
}
curr->next = new_user;
new_user->next = NULL;
}
new_user->profile_pic[0] = '\0';
strcpy(new_user->name, name);
for (int i=0; i < MAX_FRIENDS; i++) {
new_user->friends[i] = NULL;
}
new_user->first_post = NULL;
return 0;
}
int print_user(const User *user) {
if (user == NULL) {
return 1;
} else {
// Print the profile_pic
FILE *profile_pic;
profile_pic = fopen(user->profile_pic, "r");
char line[100];
if (profile_pic != NULL) {
while (fgets(line, 100, profile_pic) != NULL) {
printf("%s", line);
}
}
fclose(profile_pic);
// Prints the name
printf("\nName: %s\n", user->name);
printf("------------------------------------------\n");
// Prints the friends
printf("Friends:\n");
for (int i=0; i < MAX_FRIENDS; i++) {
if (user->friends[i] != NULL) {
printf("%s\n", user->friends[i]->name);
}
}
printf("------------------------------------------\n");
return 0;
}
} | null | null |
63c647675f004bf4898cf37e | 2023-02-15T09:30:05.608Z | Question from Code | v1 | why am i getting a segmentation fault (core dumped) | #define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int print_user(const User *user) {
if (user == NULL) {
return 1;
} else {
// Print the profile_pic
FILE *profile_pic;
profile_pic = fopen(user->profile_pic, "r");
char line[100];
if (profile_pic != NULL) {
while (fgets(line, 100, profile_pic) != NULL) {
printf("%s", line);
}
}
fclose(profile_pic);
// Prints the name
printf("\nName: %s\n", user->name);
printf("------------------------------------------\n");
// Prints the friends
printf("Friends:\n");
for (int i=0; i < MAX_FRIENDS; i++) {
if (user->friends[i] != NULL) {
printf("%s\n", user->friends[i]->name);
}
}
printf("------------------------------------------\n");
return 0;
}
} | null | null |
63c647675f004bf4898cf37e | 2023-02-15T09:40:08.793Z | Question from Code | v1 | why does my while loop run forever | #define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
/*
* Create a new user with the given name. Insert it at the tail of the list
* of users whose head is pointed to by *user_ptr_add.
*
* Return:
* - 0 if successful
* - 1 if a user by this name already exists in this list
* - 2 if the given name cannot fit in the 'name' array
* (don't forget about the null terminator)
*/
int create_user(const char *name, User **user_ptr_add) {
User *curr = *user_ptr_add;
User *new_user = malloc(sizeof(User));
// Check if memory allocation was successful; exits if not.
if (new_user == NULL) {
exit(1);
}
if (strlen(name) >= MAX_NAME) {
free(new_user);
return 2;
} else if (curr == NULL) {
*user_ptr_add = new_user;
new_user->next = *user_ptr_add;
} else {
User *next = curr -> next;
// While loop to check if the name is already in the list.
while (next != NULL) {
if (strcmp(name, next->name) != 0) {
curr = curr -> next;
next = curr -> next;
} else {
free(new_user);
return 1;
}
}
curr->next = new_user;
new_user->next = NULL;
}
new_user->profile_pic[0] = '\0';
strcpy(new_user->name, name);
for (int i=0; i < MAX_FRIENDS; i++) {
new_user->friends[i] = NULL;
}
new_user->first_post = NULL;
return 0;
} | null | null |
63c647675f004bf4898cf37e | 2023-02-15T09:43:16.813Z | Question from Code | v1 | why is my while loop running forever | #define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
/*
* Create a new user with the given name. Insert it at the tail of the list
* of users whose head is pointed to by *user_ptr_add.
*
* Return:
* - 0 if successful
* - 1 if a user by this name already exists in this list
* - 2 if the given name cannot fit in the 'name' array
* (don't forget about the null terminator)
*/
int create_user(const char *name, User **user_ptr_add) {
User *curr = *user_ptr_add;
User *new_user = malloc(sizeof(User));
// Check if memory allocation was successful; exits if not.
if (new_user == NULL) {
exit(1);
}
if (strlen(name) >= MAX_NAME) {
free(new_user);
return 2;
} else if (curr == NULL) {
*user_ptr_add = new_user;
new_user->next = *user_ptr_add;
} else {
User *next = curr -> next;
// While loop to check if the name is already in the list.
while (next != NULL) {
if (strcmp(name, next->name) == 0) {
free(new_user);
return 1;
}
curr = curr -> next;
next = next -> next;
}
curr->next = new_user;
new_user->next = NULL;
}
new_user->profile_pic[0] = '\0';
strcpy(new_user->name, name);
for (int i=0; i < MAX_FRIENDS; i++) {
new_user->friends[i] = NULL;
}
new_user->first_post = NULL;
return 0;
} | null | null |
63c647675f004bf4898cf37e | 2023-02-15T10:02:56.564Z | Help Fix Code | v1 | null | #include <time.h>
#define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
typedef struct post {
char author[MAX_NAME];
char *contents;
time_t *date;
struct post *next;
} Post;
int make_post(const User *author, User *target, char *contents) {
if (author == NULL || target == NULL) {
return 2;
} else {
// Create and allocate a new post.
Post* new_post = malloc(sizeof(Post));
// Check if memory allocation was successful; exits if not.
if (new_post == NULL) {
exit(1);
}
// Check if users are friends
if (check_friends((User*) author, target) == 0) {
strcpy(new_post->author, author->name);
strcpy(new_post->contents, contents);
// Grab the date.
time_t date = time(NULL);
time(&date);
new_post->date = &date;
// Change the posts in author's struct.
Post* old_post = target->first_post;
if (old_post == NULL) {
target->first_post = new_post;
target->next = NULL;
} else {
target->first_post = new_post;
new_post->next = old_post;
}
return 0;
} else {
free(new_post);
return 1;
}
}
} | /*
* Make a new post from 'author' to the 'target' user,
* containing the given contents, IF the users are friends.
*
* Insert the new post at the *front* of the user's list of posts.
*
* 'contents' is a pointer to heap-allocated memory - you do not need
* to allocate more memory to store the contents of the post.
*
* Return:
* - 0 on success
* - 1 if users exist but are not friends
* - 2 if either User pointer is NULL
*/
I am currently getting a segmentation fault (core dumped). | null |
63c647675f004bf4898cf37e | 2023-02-15T11:39:02.020Z | Help Fix Code | v1 | null | #include <time.h>
#define MAX_NAME 32 // Max username and profile_pic filename lengths
#define MAX_FRIENDS 10 // Max number of friends a user can have
typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
typedef struct post {
char author[MAX_NAME];
char *contents;
time_t *date;
struct post *next;
} Post;
int make_post(const User *author, User *target, char *contents) {
if (author == NULL || target == NULL) {
return 2;
} else {
// Create and allocate a new post.
Post* new_post = malloc(sizeof(Post));
// Check if memory allocation was successful; exits if not.
if (new_post == NULL) {
exit(1);
}
// Check if users are friends
if (check_friends((User*) author, target) == 0) {
strcpy(new_post->author, author->name);
new_post->contents = contents;
// Grab the current time (using time(NULL)) and assign to new_post.
time_t curr_time = time(NULL);
time_t *date = malloc(sizeof(time_t));
// If memory could not be allocated to date, exit and free the new_post memory.
if (date == NULL) {
free(new_post);
exit(1);
}
*date = curr_time;
new_post->date = date;
// Change the posts in author's struct.
Post* old_post = target->first_post;
if (old_post == NULL) {
target->first_post = new_post;
target->next = NULL;
} else {
target->first_post = new_post;
new_post->next = old_post;
}
return 0;
} else {
free(new_post);
return 1;
}
}
}
/*
* From the list pointed to by *user_ptr_del, delete the user
* with the given name.
* Remove the deleted user from any lists of friends.
*
* Return:
* - 0 on success.
* - 1 if a user with this name does not exist.
*/
int delete_user(const char *name, User **user_ptr_del) {
User* user = find_user(name, *user_ptr_del);
if (user == NULL) {
return 1;
}
User *curr_user = *user_ptr_del;
while (curr_user != NULL) {
// Check if the current user in the list is friends with the deleted user.
if (check_friends(user, curr_user) == 0) {
for (int i=0; i < MAX_FRIENDS; i++) {
if (curr_user->friends[i] == user) {
curr_user->friends[i] = NULL;
}
user->friends[i] = NULL;
}
}
}
// Remove all posts from the user's profile.
Post *curr_post = user->first_post;
Post *next_post = curr_post->next;
if (curr_post != NULL) {
while (next_post != NULL) {
// Free all allocated memory from the current post.
free(curr_post->contents);
free(curr_post->date);
free(curr_post->next);
free(curr_post);
curr_post = next_post;
next_post = curr_post->next;
}
}
// Check if user is first in the linked list.
if (user == *user_ptr_del) {
// Check if the deleted user is the only user.
if (user->next == NULL) {
*user_ptr_del = NULL;
} else {
*user_ptr_del = user->next;
user->next = NULL;
}
} else {
User* prev_user = *user_ptr_del;
User* curr_user = prev_user->next;
User* next_user = curr_user->next;
// Iterate until curr_user is the deleted user.
while (curr_user != user) {
prev_user = prev_user->next;
curr_user = curr_user->next;
next_user = next_user->next;
}
prev_user->next = next_user;
curr_user->next = NULL;
}
// Free all alocated memory from the user.
free(user->next);
free(user->first_post);
free(user);
return 0;
}
| /*
* Make a new post from 'author' to the 'target' user,
* containing the given contents, IF the users are friends.
*
* Insert the new post at the *front* of the user's list of posts.
*
* 'contents' is a pointer to heap-allocated memory - you do not need
* to allocate more memory to store the contents of the post.
*
* Return:
* - 0 on success
* - 1 if users exist but are not friends
* - 2 if either User pointer is NULL
*/
My while loop is running forever. | null |
63c647675f004bf4898cf37e | 2023-02-15T19:19:56.804Z | Question from Code | v1 | Why am I having a memory leakage from this?
| typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int print_user(const User *user) {
if (user == NULL) {
return 1;
} else {
// Prints the profile_pic
FILE *pic;
if (user->profile_pic[0] != '\0') {
pic = fopen(user->profile_pic, "r");
char line[100];
if (pic != NULL) {
while (fgets(line, 100, pic) != NULL) {
printf("%s", line);
}
printf("\n");
}
}
fclose(pic);
} | null | null |
63c647675f004bf4898cf37e | 2023-02-15T19:20:56.252Z | Question from Code | v1 | Why am I having a memory leakage? It seems like the pic is being closed by fclose(pic); | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int print_user(const User *user) {
if (user == NULL) {
return 1;
} else {
// Prints the profile_pic
FILE *pic;
if (user->profile_pic[0] != '\0') {
pic = fopen(user->profile_pic, "r");
char line[100];
if (pic != NULL) {
while (fgets(line, 100, pic) != NULL) {
printf("%s", line);
}
printf("\n");
}
}
fclose(pic);
} | null | null |
63c647675f004bf4898cf37e | 2023-02-15T19:36:02.092Z | Question from Code | v1 | Why am I getting a memory leakage? In function update_pic, the file is being closed using fclose(image); | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct post *first_post;
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
/*
* Change the filename for the profile pic of the given user.
*
* Return:
* - 0 on success.
* - 1 if the file does not exist or cannot be opened.
* - 2 if the filename is too long.
*/
int update_pic(User *user, const char *filename) {
if (strlen(filename) >= MAX_NAME) {
return 2;
} else {
FILE* image;
image = fopen(filename, "r");
if (image == NULL) {
return 1;
} else {
strcpy(user->profile_pic, filename);
return 0;
}
fclose(image);
}
}
int print_user(const User *user) {
if (user == NULL) {
return 1;
} else {
// Prints the profile_pic
FILE *pic;
if (user->profile_pic[0] != '\0') {
pic = fopen(user->profile_pic, "r");
char line[100];
if (pic != NULL) {
while (fgets(line, 100, pic) != NULL) {
printf("%s", line);
}
printf("\n");
}
}
fclose(pic);
} | null | null |
63c647675f004bf4898cf37e | 2023-02-17T20:23:48.522Z | Help Write Code | v1 | null | null | null | /* Write the copy function to perform exactly as strncpy does, with one
exception: your copy function will guarantee that dest is always
null-terminated. Capacity is expected to be the number of bytes of
memory allocated to dest.
You shoud read the man page to learn how strncpy works.
NOTE: You must write this function without using any string functions.
The only function that should depend on string.h is memset.
*/
|
63c647675f004bf4898cf37e | 2023-02-17T22:39:10.196Z | Explain Code | v1 | null | #include <stdio.h>
#define SIZE 4
#define OVERFLOW 4
int main() {
int index = 0;
int i;
int before[SIZE] = {10, 10, 10, 10};
int a[SIZE] = {0, 0, 0, 0};
int after[SIZE] = {10, 10, 10, 10};
printf("Address of the variables:\n");
for (index = 0; index < SIZE; index++) {
printf("%lx -> &after[%d]\n", (unsigned long) &after[index], index);
}
for (index = 0; index < SIZE; index++) {
printf("%lx -> &a[%d]\n", (unsigned long) &a[index], index);
}
for (index = 0; index < SIZE; index++) {
printf("%lx -> &before[%d]\n", (unsigned long) &before[index], index);
}
printf("%lx -> &i\n", (unsigned long)&i);
printf("%lx -> &index\n", (unsigned long)&index);
printf("\n");
printf("Initial values:\n");
printf("i = %d\n", i);
printf("before = {%d, %d, %d, %d}\n", before[0], before[1], before[2], before[3]);
printf("a = {%d, %d, %d, %d}\n", a[0], a[1], a[2], a[3]);
printf("after = {%d, %d, %d, %d}\n", after[0], after[1], after[2], after[3]);
printf("\n");
for (i = 0; i < OVERFLOW; i++) {
a[i] = i * 10;
printf("i = %d\n", i);
printf("before = {%d, %d, %d, %d}\n", before[0], before[1], before[2], before[3]);
printf("a = {%d, %d, %d, %d}\n", a[0], a[1], a[2], a[3]);
printf("after = {%d, %d, %d, %d}\n", after[0], after[1], after[2], after[3]);
}
return 0;
}
| null | null |
63c647695f004bf4898cf38d | 2023-01-27T21:06:10.224Z | Help Fix Code | v1 | null | void fib(int **fib_sequence, int count){
*fib_sequence = malloc(sizeof(int) * count);
if (count >= 1){
(*fib_sequence)[0] = 0;
}
if (count >= 2){
(*fib_sequence)[1] = 1;
}
if (count >= 3){
for (int i = 2; i < count; i++){
(*fib_sequence)[i] = (*fib_sequence)[i-2] + (*fib_sequence)[i-1];
}
}
}
int main(int argc, char **argv) {
/* do not change this main function */
int count = strtol(argv[1], NULL, 10);
int *fib_sequence;
fib(&fib_sequence, count);
for (int i = 0; i < count; i++) {
printf("%d ", fib_sequence[i]);
}
free(fib_sequence);
return 0;
} | Building a dynamic array containing the first n elements of the Fibonacci sequence | null |
63c647695f004bf4898cf38d | 2023-01-27T21:13:00.344Z | Help Fix Code | v1 | null | void fib(int **fib_sequence, int count){
*fib_sequence = malloc(sizeof(int) * count);
if (count >= 1){
(*fib_sequence)[0] = 0;
}
if (count >= 2){
(*fib_sequence)[1] = 1;
}
if (count >= 3){
for (int i = 2; i < count; i++){
(*fib_sequence)[i] = (*fib_sequence)[i-2] + (*fib_sequence)[i-1];
}
}
}
int main(int argc, char **argv) {
/* do not change this main function */
int count = strtol(argv[1], NULL, 10);
int *fib_sequence;
fib(&fib_sequence, count);
for (int i = 0; i < count; i++) {
printf("%d ", fib_sequence[i]);
}
free(fib_sequence);
return 0;
} | /*
* Define a function void fib(...) below. This function takes parameter n
* and generates the first n values in the Fibonacci sequence. Recall that this
* sequence is defined as:
* 0, 1, 1, 2, 3, 5, ... , fib[n] = fib[n-2] + fib[n-1], ...
* The values should be stored in a dynamically-allocated array composed of
* exactly the correct number of integers. The values should be returned
* through a pointer parameter passed in as the first argument.
*
* See the main function for an example call to fib.
* Pay attention to the expected type of fib's parameters.
*/ | null |
63c647695f004bf4898cf38d | 2023-01-29T23:38:28.773Z | Help Fix Code | v1 | null |
int populate_array(int sin, int *sin_array) {
int temp = sin;
int size = 0;
while (temp != 0){
temp /= 10;
size ++;
}
if (size != 9) {
return 1;
}
else {
for (int i = size - 1; i >= 0; i--){
sin_array[i] = sin % 10;
sin /= 10;
}
return 0;
}
} | /*
* Convert a 9 digit int to a 9 element int array.
*/
| null |
63c647695f004bf4898cf38d | 2023-01-29T23:39:54.539Z | Explain Code | v1 | null |
int populate_array(int sin, int *sin_array) {
int temp = sin;
int size = 0;
while (temp != 0){
temp /= 10;
size ++;
}
if (size != 9) {
return 1;
}
else {
for (int i = size - 1; i >= 0; i--){
sin_array[i] = sin % 10;
sin /= 10;
}
return 0;
}
} | null | null |
End of preview. Expand
in Dataset Viewer.
Dataset Documentation
Overview
This dataset contains 6776 questions asked by students from CodeAid, an AI coding assistant, during a C programming class over a 12-week semester from January to April 2023. The course did not allow the use of ChatGPT, but CodeAid was permitted. CodeAid, powered by GPT-3, did not directly disclose code solutions even when requested by students. Instead, it functioned like a teaching assistant, providing scaffolded responses in natural language, generating interactive pseudo-codes, and suggesting fixes without directly showing the corrected code.
Dataset Use Cases
- Query Classification: The dataset can be used to develop models that classify queries into categories explained in the paper such as the ones we identified in the thematic analysis of our CHI'24 paper: Code and Conceptual Clarification, Function-Specific Queries, Code Execution Probes, Buggy Code Resolution, Problem Source Identification, Error Message Interpretation, High-level Coding Guidance, and Direct Code Requests.
- Building Scaffolded LLM Responses: This dataset can be used to iteratively design and test LLM-powered interactive interfaces that display scaffolded responses other than those used in CodeAid.
- AI in Education Research: Researchers can use this dataset to study the role and effectiveness of LLMs, in educational settings. This can provide insights into how AI can be integrated into classrooms to enhance learning outcomes.
- Performance Benchmarking: Tool designers can benchmark the performance of their tools and even AI models against real-world student queries, helping them iterate and improve their tools and models.
Dataset Structure
The dataset includes the following columns:
- user_id: Unique identifier for the user. Type: String.
- time: Timestamp of when the event occurred. Format: ISO 8601, Type: DateTime.
- feature_type: Describes the type of feature the row represents, e.g., 'Question from Code'. Type: String.
- feature_version: Version of the feature. Type: String. Values:
"v1"(usedcode-davinci-002),"v2"(usedgpt-3.5-turbo-1106) - input_question: The question input by the user. This column exists when
feature_typeis either"General Question", or"Question from Code". - input_code: The code snippet provided by the user. This column exists when
feature_typeis either"General Question","Question from Code","Help Fix Code", or"Explain Code". - input_intention: A brief description of what the user intends to achieve with the code. This column exists when
feature_typeis"Help Fix Code". - input_task_description: Detailed description of the task for which the code is written. This column exists when
feature_typeis"Help Write Code".
Citation
If you use this dataset in your research, please cite the CHI 2024 paper: https://arxiv.org/abs/2401.11314
@article{kazemitabaar2024codeaid,
title={CodeAid: Evaluating a Classroom Deployment of an LLM-based Programming Assistant that Balances Student and Educator Needs},
author={Kazemitabaar, Majeed and Ye, Runlong and Wang, Xiaoning and Henley, Austin Z and Denny, Paul and Craig, Michelle and Grossman, Tovi},
booktitle={Proceedings of the 2024 CHI Conference on Human Factors in Computing Systems},
year={2024}
}
License
This dataset is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). You are free to share (copy and redistribute the material in any medium or format) and adapt (remix, transform, and build upon the material) under the following terms:
- Attribution: You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- NonCommercial: You may not use the material for commercial purposes.
For more details, please visit Creative Commons — Attribution-NonCommercial 4.0 International — CC BY-NC 4.0.
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