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63c647945f004bf4898cf4e6

2023-01-19T03:06:59.172Z

Question from Code

v1

are there any bugs?

int main() { char phone[11]; int i; scanf("%s", phone); scanf("%d", &i); if (i < -1 || i > 9) { printf("ERROR"); return 1; } else if (i == -1) { printf("%s", phone); } else { printf("%c", phone[i]); } return 0; }

63c647945f004bf4898cf4e6

2023-01-25T20:49:41.822Z

Question from Code

v1

this is not working

int **split_array(const int *s, int length) { int arr[2]; int numEven, numOdd; numOdd = length / 2; if (length % 2 == 0) { numEven = length / 2; } else { numEven = (length / 2) + 1; } arr[0] = malloc(sizeof(int) * numEven); arr[1] = malloc(sizeof(int) * numOdd); for (int i = 0; i < length; i = i + 2) { arr[0][i] = s[i]; } for (int j = 0; j < length; j = j + 2) { arr[1][j] = s[j]; } return arr; }

63c647945f004bf4898cf4e6

2023-01-25T20:52:09.726Z

Question from Code

v1

not working

int **split_array(const int *s, int length) { int **arr[2]; int numEven, numOdd; numOdd = length / 2; if (length % 2 == 0) { numEven = length / 2; } else { numEven = (length / 2) + 1; } arr[0] = malloc(sizeof(int) * numEven); arr[1] = malloc(sizeof(int) * numOdd); for (int i = 0; i < length; i = i + 2) { arr[0][i] = s[i]; } for (int j = 0; j < length; j = j + 2) { arr[1][j] = s[j]; } return arr; }

63c647945f004bf4898cf4e6

2023-01-25T20:54:28.026Z

Question from Code

v1

not working

int **split_array(const int *s, int length) { int *arr[2]; int numEven, numOdd; numOdd = length / 2; if (length % 2 == 0) { numEven = length / 2; } else { numEven = (length / 2) + 1; } arr[0] = malloc(sizeof(int) * numEven); arr[1] = malloc(sizeof(int) * numOdd); for (int i = 0; i < length; i = i + 2) { arr[0][i] = s[i]; } for (int j = 1; j < length; j = j + 2) { arr[1][j] = s[j]; } return arr; }

63c647945f004bf4898cf4e6

2023-01-25T20:55:07.236Z

Question from Code

v1

not working

int **split_array(const int *s, int length) { int *arr[2]; int numEven, numOdd; numOdd = length / 2; if (length % 2 == 0) { numEven = length / 2; } else { numEven = (length / 2) + 1; } arr[0] = malloc(sizeof(int) * numEven); arr[1] = malloc(sizeof(int) * numOdd); for (int i = 0; i < length; i = i + 2) { arr[0][i] = s[i]; } for (int j = 1; j < length; j = j + 2) { arr[1][j] = s[j]; } return &arr; }

63c647945f004bf4898cf4e6

2023-01-25T21:01:59.961Z

Question from Code

v1

how do I return a pointer to an array of pointers to integers?

int **split_array(const int *s, int length) { int *arr[2]; int numEven, numOdd; numOdd = length / 2; if (length % 2 == 0) { numEven = length / 2; } else { numEven = (length / 2) + 1; } arr[0] = malloc(sizeof(int) * numEven); arr[1] = malloc(sizeof(int) * numOdd); for (int i = 0; i < length; i = i + 2) { arr[0][i] = s[i]; } for (int j = 1; j < length; j = j + 2) { arr[1][j] = s[j]; } return arr; }

63c647945f004bf4898cf4e6

2023-01-25T21:16:21.977Z

Explain Code

v1

int **split_array(const int *s, int length) { int **arr = malloc(sizeof(int *) * 2); int numEven, numOdd; numOdd = length / 2; if (length % 2 == 0) { numEven = length / 2; } else { numEven = (length / 2) + 1; } arr[0] = malloc(sizeof(int) * numEven); arr[1] = malloc(sizeof(int) * numOdd); for (int i = 0; i < length; i = i + 2) { arr[0][i] = s[i]; } for (int j = 1; j < length; j = j + 2) { arr[1][j] = s[j]; } return arr; }

63c647945f004bf4898cf4e6

2023-01-28T19:02:31.512Z

General Question

v1

give an example of a program that uses both scanf and command-line arguments

63c647945f004bf4898cf4e6

2023-01-28T19:13:29.960Z

General Question

v1

given an example of a program that uses scanf for several lines of input

63c647945f004bf4898cf4e6

2023-01-28T19:31:31.380Z

General Question

v1

give an example of a program that uses scanf

63c647945f004bf4898cf4e6

2023-03-03T01:46:12.658Z

Question from Code

v1

how many processes are forked?

#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); int original_process = getpid(); for (int i = 0; i < iterations; i++) { if (getpid() == original_process) { int n = fork(); if (n < 0) { perror("fork"); exit(1); } } printf("ppid = %d, pid = %d, i = %d\n", getppid(), getpid(), i); } return 0; }

63c647945f004bf4898cf4e6

2023-03-03T01:47:08.246Z

Question from Code

v1

describe the processes and their relationship to each other

#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); int original_process = getpid(); for (int i = 0; i < iterations; i++) { if (getpid() == original_process) { int n = fork(); if (n < 0) { perror("fork"); exit(1); } } printf("ppid = %d, pid = %d, i = %d\n", getppid(), getpid(), i); } return 0; }

63c647945f004bf4898cf4e6

2023-03-03T01:47:53.368Z

Question from Code

v1

describe the processes and their relationship to each other

#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; }

63c647945f004bf4898cf4e6

2023-03-09T22:01:51.217Z

General Question

v2

how do i use dup2

63c647945f004bf4898cf4e6

2023-03-09T22:03:13.753Z

General Question

v2

how can i make the child process read two lines of pipe from the parent process in an execl call?

63c647945f004bf4898cf4e6

2023-03-09T22:04:11.924Z

General Question

v2

how can i use the execl call for standard input

63c647945f004bf4898cf4e6

2023-03-09T22:06:25.228Z

General Question

v2

i want to pass standard input from the parent process to a program being called in the child process using the execl call

63c647945f004bf4898cf4e6

2023-03-09T22:13:15.623Z

General Question

v2

i have an execl call in my child process that reads from standard input. where do i close my file descriptors?

63c647945f004bf4898cf4e6

2023-03-14T02:03:31.511Z

Help Fix Code

v2

remove potential segmentation fault

Rule *create_rule(const char *target, Rule **starting_rule) { printf("Creating a new rule.\n"); Rule *new_rule = malloc(sizeof(Rule)); if (new_rule == NULL) { perror("malloc"); exit(1); } new_rule->target = ""; strcpy(new_rule->target, target); new_rule->dependencies = NULL; new_rule->actions = NULL; new_rule->next_rule = NULL; if (*starting_rule == NULL) { *starting_rule = new_rule; } else { Rule *current_rule = *starting_rule; while (current_rule->next_rule != NULL) { current_rule = current_rule->next_rule; } current_rule->next_rule = new_rule; } printf("Finished creating the new rule.\n"); return new_rule; }

63c647955f004bf4898cf4f0

2023-01-26T00:48:40.125Z

General Question

v1

how do i get a slice of an array in c

63c647955f004bf4898cf4f0

2023-01-26T00:49:25.748Z

General Question

v1

how do i convert a char array to a string array in c

63c647965f004bf4898cf4f5

2023-01-24T20:43:34.837Z

General Question

v1

what is the difference between * and &?

63c647965f004bf4898cf4f5

2023-02-09T20:48:31.958Z

Question from Code

v1

where is the segmentation fault?

int create_user(const char *name, User **user_ptr_add) { User *prev; User *curr = *user_ptr_add; if (strlen(name) > 31) { return 2; } else { while (curr != NULL) { if (strcmp(curr->name, name) == 0) { return 1; } prev = curr; curr = curr->next; } User *new_user = malloc(sizeof(User)); strcpy(new_user->name, name); new_user->name[strlen(name)] = '\0'; new_user->profile_pic[0] = '\0'; new_user->first_post = NULL; for (int i = 0; i < MAX_FRIENDS; i++) { (new_user->friends)[i] = NULL; } new_user->next = NULL; if (prev != NULL) { prev->next = new_user; } else { user_ptr_add[0] = curr; } return 0; } }

63c647965f004bf4898cf4f5

2023-02-09T20:50:00.620Z

Question from Code

v1

where is the segmentation fault?

int create_user(const char *name, User **user_ptr_add) { User *prev; User *curr = *user_ptr_add; if (strlen(name) > 31) { return 2; } else { while (curr != NULL) { if (strcmp(curr->name, name) == 0) { return 1; } prev = curr; curr = curr->next; } User *new_user = malloc(sizeof(User)); strncpy(new_user->name, name, 31); new_user->name[strlen(name)] = '\0'; new_user->profile_pic[0] = '\0'; new_user->first_post = NULL; for (int i = 0; i < MAX_FRIENDS; i++) { (new_user->friends)[i] = NULL; } new_user->next = NULL; if (prev != NULL) { prev->next = new_user; } else { user_ptr_add[0] = curr; } return 0; } }

63c647965f004bf4898cf4f5

2023-02-10T01:46:26.963Z

Question from Code

v1

where is the segmentation fault?

int create_user(const char *name, User **user_ptr_add) { User *prev; User *curr = *user_ptr_add; if (strlen(name) > 31) { return 2; } else { while (curr != NULL) { if (strcmp(curr->name, name) == 0) { return 1; } prev = curr; curr = curr->next; } User *new_user = malloc(sizeof(User)); strcpy(new_user->name, name); new_user->name[strlen(name)] = '\0'; new_user->profile_pic[0] = '\0'; new_user->first_post = NULL; for (int i = 0; i < MAX_FRIENDS; i++) { (new_user->friends)[i] = NULL; } new_user->next = NULL; if (prev != NULL) { prev->next = new_user; } else { user_ptr_add[0] = curr; } return 0; } }

63c647965f004bf4898cf4f5

2023-02-10T01:47:31.026Z

Help Fix Code

v1

int create_user(const char *name, User **user_ptr_add) { User *prev; User *curr = *user_ptr_add; if (strlen(name) > 31) { return 2; } else { while (curr != NULL) { if (strcmp(curr->name, name) == 0) { return 1; } prev = curr; curr = curr->next; } User *new_user = malloc(sizeof(User)); strcpy(new_user->name, name); new_user->name[strlen(name)] = '\0'; new_user->profile_pic[0] = '\0'; new_user->first_post = NULL; for (int i = 0; i < MAX_FRIENDS; i++) { (new_user->friends)[i] = NULL; } new_user->next = NULL; if (prev != NULL) { prev->next = new_user; } else { user_ptr_add[0] = curr; } return 0; } }

fix segmentation fault

63c647965f004bf4898cf4f5

2023-02-10T01:58:01.300Z

Question from Code

v1

where is the segmentation fault?

int create_user(const char *name, User **user_ptr_add) { User *prev; User *curr = *user_ptr_add; if (strlen(name) > 31) { return 2; } else { while (curr != NULL) { if (strcmp(curr->name, name) == 0) { return 1; } prev = curr; curr = curr->next; } User *new_user = malloc(sizeof(User)); strncat(new_user->name, name, 31); new_user->name[strlen(name)] = '\0'; new_user->profile_pic[0] = '\0'; new_user->first_post = NULL; for (int i = 0; i < MAX_FRIENDS; i++) { (new_user->friends)[i] = NULL; } new_user->next = NULL; if (prev != NULL) { prev->next = new_user; } else { *user_ptr_add = new_user; } return 0; } }

63c647965f004bf4898cf4f5

2023-02-10T02:03:31.340Z

Question from Code

v1

where is the segmentation fault

int create_user(const char *name, User **user_ptr_add) { User *prev; User *curr = *user_ptr_add; if (strlen(name) > 31) { return 2; } else { while (curr != NULL) { if (strcmp(curr->name, name) == 0) { return 1; } prev = curr; curr = curr->next; } User *new_user = malloc(sizeof(User)); strncat(new_user->name, name, 32); new_user->name[31] = '\0'; (new_user->profile_pic)[0] = '\0'; new_user->first_post = NULL; for (int i = 0; i < MAX_FRIENDS; i++) { (new_user->friends)[i] = NULL; } new_user->next = NULL; if (prev != NULL) { prev->next = new_user; } else { *user_ptr_add = new_user; } return 0; } }

63c647965f004bf4898cf4f5

2023-02-10T02:32:48.756Z

Question from Code

v1

where is the segmentation fault?

int create_user(const char *name, User **user_ptr_add) { User *prev; User *curr = *user_ptr_add; if (strlen(name) > 31) { return 2; } else { while (curr != NULL) { if (strcmp(curr->name, name) == 0) { return 1; } prev = curr; curr = curr->next; } User *new_user = malloc(sizeof(User)); strncpy(new_user->name, name, 31); new_user->name[31] = '\0'; new_user->profile_pic[0] = '\0'; new_user->first_post = NULL; for (int i = 0; i < MAX_FRIENDS; i++) { (new_user->friends)[i] = NULL; } new_user->next = NULL; if (prev != NULL) { prev->next = new_user; } else { *user_ptr_add = new_user; } return 0; } }

63c647965f004bf4898cf4f5

2023-02-12T07:15:52.803Z

General Question

v1

how do i set a time_t?

63c647995f004bf4898cf513

2023-01-17T21:56:34.400Z

Explain Code

v1

#include <stdio.h> int main() { char c = 'b'; // declare and set variable c_ptr so that the code below prints 'b' // Submitted code below int *c_ptr = &c; // Submitted code above printf("%c", *c_ptr); return 0; }

63c647995f004bf4898cf513

2023-04-09T19:01:33.032Z

General Question

v2

I received an error when trying to run my executable on teach.cs, a shared Linux system. What is this error? How can it be fixed? /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.34' not found

63c647995f004bf4898cf518

2023-01-20T22:54:36.083Z

Help Fix Code

v1

int main(){ char phone[11]; int num; scanf("%s", phone); scanf("%d", &num); if (num == -1){ printf("%s\n", phone); return 0; } else if (num < -1 || num > 9){ printf("ERROR\n"); return 1; } else{ printf("%c\n", phone[num]); return 0; } }

63c647995f004bf4898cf518

2023-01-20T22:55:32.863Z

Help Fix Code

v1

int main(){ char phone[11]; int num; scanf("%s", phone); scanf("%d", &num); if (num == -1){ printf("%s\n", phone); return 0; } else if (num < -1 || num > 9){ printf("ERROR\n"); return 1; } else{ printf("%c\n", phone[num]); return 0; } }

This program will again read from standard input using scanf and take no command-line arguments. Similar to phone.c, this program reads a 10-character string as the first input value but then it repeatedly reads integers until standard input is closed. (Hint: Use a while loop that checks the return value of scanf to accomplish this. Check the man page for scanf to determine the return value when the input stream is closed.) After each integer the output produced is as before: if the integer is -1, the full string is printed if the integer is between 0 and 9, the individual character at that position is printed if the integer is less than -1 or greater than 9, the message "ERROR" is printed (to stdout) In each case the printing is followed by a newline character. When the program finishes running, main returns with a 0 return code if there were no errors and with a 1 return code otherwise.

63c647995f004bf4898cf518

2023-01-27T19:10:50.597Z

Help Fix Code

v1

int *build_array(char **strs, int size) { int *int_arr = malloc(sizeof(int) * size); char *leftover; strtol(*strs, &leftover, 10); for (int i = 0; i < size; i++){ int_arr[i] = strtol(leftover, &leftover, 10); printf("%d", int_arr[i]); } return int_arr; }

Want to return a pointer to an array of ints with size elements. - strs is an array of strings where each element is the string representation of an integer. - size is the size of the

63c647995f004bf4898cf518

2023-02-12T19:42:43.707Z

Explain Code

v1

(var) |= 1 << (flag)

63c647995f004bf4898cf518

2023-02-12T19:51:20.056Z

General Question

v1

what is static inline?

63c647995f004bf4898cf518

2023-02-12T20:01:58.811Z

Explain Code

v1

char * (*x) (char *) = my_func;

63c647995f004bf4898cf518

2023-02-12T20:42:26.279Z

General Question

v1

strtol does not set errno when it fails because it isn't a system call. why the above sentence wrong

63c647995f004bf4898cf518

2023-02-12T20:43:12.503Z

General Question

v1

strtol does not set errno when it fails because it isn't a system call.

63c647995f004bf4898cf518

2023-02-12T20:44:02.552Z

General Question

v1

will system call set errno?

63c647995f004bf4898cf518

2023-03-02T22:17:49.404Z

Explain Code

v1

char name[5]; strncat(name, "Hi", 2);

63c647995f004bf4898cf518

2023-03-03T03:29:23.449Z

Question from Code

v1

How many processes are created, including the original parent, when the program is called with 2, 3, and 4 as arguments? n arguments?

#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; }

63c647995f004bf4898cf518

2023-03-13T03:33:03.086Z

Question from Code

v2

What does the program print to stderr if the user presses Ctrl+C at the moment when the program is at position B?

int x = 5; void handler(int sig) { x += 3; fprintf(stderr, "inside %d ", x); } int main() { fprintf(stderr, "start "); struct sigaction act; act.sa_handler = handler; act.sa_flags = 0; sigemptyset(&act.sa_mask); sigaction(SIGINT, &act, NULL); x += 2; fprintf(stderr, "outside %d", x); return 0; }

63c647995f004bf4898cf518

2023-04-22T17:30:52.297Z

Question from Code

v2

what value stores in y at the end

char *result[2]; x = result[0]; result[0] = "read only"; y = x[0];

63c647995f004bf4898cf518

2023-04-22T21:16:08.192Z

General Question

v2

Is string literal differ than a char

63c647995f004bf4898cf518

2023-04-22T21:19:20.869Z

Question from Code

v2

When call fun('a') in main stack, will it allocate space for 'a'?

int fun(char i) { ... } int main() { fun(’a’); }

63c647995f004bf4898cf518

2023-04-22T22:30:03.313Z

Question from Code

v2

what kind of error will the code has? what is the difference between run-time error and compile error?

char *third = malloc(sizeof(char) * 10); third = "Wednesday"; third[0] = 'w';

63c647995f004bf4898cf518

2023-04-23T20:14:48.702Z

Question from Code

v2

if argv[1] is zero, what kind of error will it incur

int main(int argc, char **argv) { char *next = NULL; errno = 0; long longi = strtol(argv[1], &next, 0); int i = longi; printf("longi: %ld\n", longi); printf("i: %d\n", i); printf("next is |%s|\n", next); if (errno != 0) { perror("strtol"); } return 0; }

63c647995f004bf4898cf518

2023-04-24T02:32:59.217Z

General Question

v2

what is the difference between execl and execvp

63c647995f004bf4898cf518

2023-04-24T02:43:07.367Z

General Question

v2

what does dup2 do

63c647995f004bf4898cf518

2023-04-24T15:15:13.184Z

General Question

v2

what do signal mask do

63c647995f004bf4898cf518

2023-04-24T19:39:49.365Z

General Question

v2

what does accpet() do

63c647995f004bf4898cf518

2023-04-24T19:45:37.542Z

General Question

v2

what does sprintf() do

63c647995f004bf4898cf518

2023-04-24T20:45:47.574Z

General Question

v2

when will read() block

63c647995f004bf4898cf518

2023-04-24T21:08:39.795Z

General Question

v2

what does htons() do

63c647995f004bf4898cf518

2023-04-24T22:45:24.442Z

General Question

v2

what kind of error will occur is we do not double quote filename in shell programming?

63c647995f004bf4898cf518

2023-04-25T02:40:12.345Z

General Question

v2

what are the attributes in struct called

63c647995f004bf4898cf518

2023-04-25T02:47:02.253Z

General Question

v2

what does socket do

63c647995f004bf4898cf518

2023-04-25T02:49:48.591Z

General Question

v2

what does port do

63c647995f004bf4898cf518

2023-04-25T02:53:55.228Z

General Question

v2

what does listen() do

63c647995f004bf4898cf518

2023-04-25T02:56:10.670Z

General Question

v2

what does dup2() do

63c647995f004bf4898cf518

2023-04-25T03:05:56.175Z

General Question

v2

why we use fprintf to output stderr

63c647995f004bf4898cf518

2023-04-25T03:14:28.730Z

General Question

v2

will main function always return int or can we set to be void

63c647995f004bf4898cf518

2023-04-25T03:35:59.497Z

General Question

v2

does sizeof int different on different machine

63c647995f004bf4898cf518

2023-04-25T04:01:36.405Z

General Question

v2

how to send SIGUSR1 signal to a process in command line

63c647995f004bf4898cf518

2023-04-25T04:05:11.359Z

General Question

v2

If we want to modify permission of myscript.sh, when we use chmod, why we just write myscript rather than myscript.sh

63c647995f004bf4898cf518

2023-04-25T04:07:50.444Z

General Question

v2

what does each of three permissions mean

63c647995f004bf4898cf518

2023-04-25T04:18:23.868Z

General Question

v2

what does /dev/null 2 /dev/null mean

63c647995f004bf4898cf518

2023-04-25T04:28:09.259Z

General Question

v2

in shell programming, when to use test and when do not

63c647995f004bf4898cf518

2023-04-25T15:32:10.023Z

General Question

v2

can you show the process and the steps of creating and setting up a socket

63c647995f004bf4898cf518

2023-04-25T18:37:01.773Z

Question from Code

v2

why the code below copies the fields of b into a.

struct node a, b; a = b;

63c647995f004bf4898cf518

2023-04-25T18:41:24.967Z

Question from Code

v2

why this does not cause memory leak

struct node { int val; struct node *next; }; void free_list(struct node *head) { while (head != NULL) { free(head); head = head->next; }

63c647995f004bf4898cf518

2023-04-25T18:49:07.460Z

General Question

v2

will exit after execl executed?

63c647995f004bf4898cf518

2023-04-25T19:25:35.158Z

General Question

v2

what is the difference between execl, execlp, execv, execvp

63c647995f004bf4898cf518

2023-04-25T20:42:19.567Z

General Question

v2

when calling select, what kind of fds will remain in the set

63c647995f004bf4898cf518

2023-05-15T21:08:27.573Z

Question from Code

v2

what does this code mean

list(product(self.NodeType, repeat = 2))

63c6479c5f004bf4898cf531

2023-01-20T03:22:23.415Z

Explain Code

v1

char **last_names; last_names = malloc(sizeof(char*) * 4); last_names[0] = malloc(sizeof(char)* 20); last_names[1] = malloc(sizeof(char) * 20); last_names[2] = malloc(sizeof(char) * 20); last_names[3] = malloc(sizeof(char) * 20);

63c6479c5f004bf4898cf531

2023-01-20T03:23:43.064Z

General Question

v1

explain **last_names

63c6479f5f004bf4898cf545

2023-01-18T22:07:17.912Z

Question from Code

v1

would this allocate the exact amount of memory of a float to allocated_amount

allocated_amount = malloc(sizeof(float));

63c6479f5f004bf4898cf545

2023-01-18T22:17:50.520Z

Question from Code

v1

how do you set the a variable x to the exact amount of space that should be allocated and pointed to by float *rainfall.

float *rainfall = null;

63c6479f5f004bf4898cf545

2023-01-26T04:03:47.048Z

Question from Code

v1

will this program compile

void main(int arc, char**argv) { char *size = argv[1]; if(argv == 3) { char*x = argv[2]; } }

63c6479f5f004bf4898cf545

2023-01-26T04:04:36.627Z

Question from Code

v1

will this compile

void main(int arc, char**argv) { char *size = argv[1]; if(argc == 3) { char*x = argv[2]; } }

63c6479f5f004bf4898cf545

2023-01-26T04:06:35.194Z

Question from Code

v1

will this compile

int main(int argc, char**argv) { if (!(argc == 2 || argc ==3)) { fprintf(stderr, "x"); return 1; } char *size = argv[1]; if(argc == 3) { char*x = argv[2]; } return 0; }

63c6479f5f004bf4898cf545

2023-01-26T04:08:47.450Z

General Question

v1

How would i redirect information from a file as standard input using scanf?

63c6479f5f004bf4898cf545

2023-01-26T04:09:56.203Z

General Question

v1

How would i redirect information from a file as standard input using scanf when i do not know the name of the file?

63c6479f5f004bf4898cf545

2023-01-26T04:11:33.693Z

Help Write Code

v1

You should use scanf to read the input. Since your program reads from standard input, it would be possible to type all the input to your program from the keyboard. But typing in a listing that looks like the output from ls -l even once would be awful. Instead you could run ls -l and pipe its output to your program. Make sure you understand that last sentence and try it out. Even better, you should run ls -l and redirect its output to another file. Then edit that file to create different versions that thoroughly test your program. Now run your program and redirect standard input to read from one of the test input files that you just created.

63c6479f5f004bf4898cf545

2023-01-26T04:13:11.107Z

General Question

v1

how do i use scanf to read what i redirected to standard input

63c6479f5f004bf4898cf545

2023-01-26T22:58:43.440Z

Help Fix Code

v1

int *func(char **strs, int size) { int *arr = malloc(sizeof(int) * size); for (int i = 0l i<size; i++) { arr[i] = strtol(strs[i], NULL, 10); } return arr; }

Return a pointer to an array of ints with size elements. strs is an array of strings where each element is the string representation of an integer. size is the size of the array

63c6479f5f004bf4898cf545

2023-01-26T22:59:36.845Z

Help Fix Code

v1

int *func(char **strs, int size) { int *arr = malloc(sizeof(int) * size); for (int i = 0; i<size; i++) { arr[i] = strtol(strs[i], NULL, 10); } return arr; }

Return a pointer to an array of ints with size elements. strs is an array of strings where each element is the string representation of an integer. size is the size of the array

63c6479f5f004bf4898cf545

2023-01-26T23:00:54.436Z

General Question

v1

what will this code do

63c6479f5f004bf4898cf545

2023-01-26T23:07:22.567Z

Help Fix Code

v1

int **func(const int *s, int length) { int **arrays; int *arr_even= malloc(sizeof(int) * ((length/2) - (length%2))); int *arr_odd= malloc(sizeof(int) * ((length/2) + (length%2))); int even_count; int odd_count; for (int i = 0; i < length; i++) { if (i / 2 == 0) { arr_even[even_count] = s[i]; even_count++; } else { arr_odd[odd_count] = s[i]; odd_count++; } } arrays[0] = arr_even; arrays[1] = arr_odd; return arrays; }

Return a pointer to an array of two dynamically allocated arrays of ints.The first array contains the elements of the input array s that are at even indices. The second array contains the elements of the input array s that are at odd indices.

63c6479f5f004bf4898cf545

2023-01-26T23:09:04.197Z

Help Fix Code

v1

int **func(const int *s, int length) { int **arrays = malloc(sizeof(int *) * 2); int *arr_even= malloc(sizeof(int) * ((length/2) - (length%2))); int *arr_odd= malloc(sizeof(int) * ((length/2) + (length%2))); int even_count=0; int odd_count=0; for (int i = 0; i < length; i++) { if (i / 2 == 0) { arr_even[even_count] = s[i]; even_count++; } else { arr_odd[odd_count] = s[i]; odd_count++; } } arrays[0] = arr_even; arrays[1] = arr_odd; return arrays; }

Return a pointer to an array of two dynamically allocated arrays of ints.The first array contains the elements of the input array s that are at even indices. The second array contains the elements of the input array s that are at odd indices.

63c6479f5f004bf4898cf545

2023-01-26T23:09:51.236Z

Help Fix Code

v1

int **func(const int *s, int length) { int **arrays = malloc(sizeof(int *) * 2); int *arr_even= malloc(sizeof(int) * ((length/2) - (length%2))); int *arr_odd= malloc(sizeof(int) * ((length/2) + (length%2))); int even_count=0; int odd_count=0; for (int i = 0; i < length; i++) { if (i % 2 == 0) { arr_even[even_count] = s[i]; even_count++; } else { arr_odd[odd_count] = s[i]; odd_count++; } } arrays[0] = arr_even; arrays[1] = arr_odd; return arrays; }

Return a pointer to an array of two dynamically allocated arrays of ints.The first array contains the elements of the input array s that are at even indices. The second array contains the elements of the input array s that are at odd indices.

63c6479f5f004bf4898cf545

2023-01-26T23:16:36.061Z

Question from Code

v1

what parameters should i be putting into full_array and result?

int main(int argc, char **argv) { /* Replace the comments in the next two lines with the appropriate arguments. Do not add any additional lines of code to the main function or make other changes. */ int *full_array = build_array(argv[1], sizeof(argv[1]) / sizeof(argv[1][0])); int **result = split_array(full_array, sizeof(full_array) / sizeof(full_array[0])); printf("Original array:\n"); for (int i = 0; i < argc - 1; i++) { printf("%d ", full_array[i]); } printf("\n"); printf("result[0]:\n"); for (int i = 0; i < argc / 2; i++) { printf("%d ", result[0][i]); } printf("\n"); printf("result[1]:\n"); for (int i = 0; i < (argc - 1) / 2; i++) { printf("%d ", result[1][i]); } printf("\n"); free(full_array); free(result[0]); free(result[1]); free(result); return 0; }

63c6479f5f004bf4898cf545

2023-01-26T23:23:54.840Z

Question from Code

v1

how can i fix this so my code compiles without error

int main(int argc, char **argv) { /* Replace the comments in the next two lines with the appropriate arguments. Do not add any additional lines of code to the main function or make other changes. */ int *full_array = build_array(argv[1], argc - 1); int **result = split_array(full_array, sizeof(full_array) / sizeof(full_array[0])); printf("Original array:\n"); for (int i = 0; i < argc - 1; i++) { printf("%d ", full_array[i]); } printf("\n"); printf("result[0]:\n"); for (int i = 0; i < argc / 2; i++) { printf("%d ", result[0][i]); } printf("\n"); printf("result[1]:\n"); for (int i = 0; i < (argc - 1) / 2; i++) { printf("%d ", result[1][i]); } printf("\n"); free(full_array); free(result[0]); free(result[1]); free(result); return 0; }

63c6479f5f004bf4898cf545

2023-01-26T23:28:20.032Z

General Question

v1

how would i find the size of a pointer to an array

63c6479f5f004bf4898cf545

2023-01-26T23:29:04.706Z

Question from Code

v1

would this compile

int main(int argc, char **argv) { /* Replace the comments in the next two lines with the appropriate arguments. Do not add any additional lines of code to the main function or make other changes. */ int *full_array = build_array(argv[1], argc - 1); int **result = split_array(full_array, sizeof(full_array)); printf("Original array:\n"); for (int i = 0; i < argc - 1; i++) { printf("%d ", full_array[i]); } printf("\n"); printf("result[0]:\n"); for (int i = 0; i < argc / 2; i++) { printf("%d ", result[0][i]); } printf("\n"); printf("result[1]:\n"); for (int i = 0; i < (argc - 1) / 2; i++) { printf("%d ", result[1][i]); } printf("\n"); free(full_array); free(result[0]); free(result[1]); free(result); return 0; }

63c6479f5f004bf4898cf545

2023-01-26T23:29:46.514Z

General Question

v1

how do i find the size of an array of int *

63c6479f5f004bf4898cf545

2023-01-26T23:32:57.817Z

Help Fix Code

v1

int *build_array(char **strs, int size) { int *arr = malloc(sizeof(int) * size); for (int i = 0; i < size; i++) { arr[i] = strtol(strs[i], NULL, 10); } return arr; } int **split_array(const int *s, int length) { int **arrays = malloc(sizeof(int *) * 2); int *arr_even = malloc(sizeof(int) * ((length / 2) - (length % 2))); int *arr_odd = malloc(sizeof(int) * ((length / 2) + (length % 2))); int even_count = 0; int odd_count = 0; for (int i = 0; i < length; i++) { if (i % 2 == 0) { arr_even[even_count] = s[i]; even_count++; } else { arr_odd[odd_count] = s[i]; odd_count++; } } arrays[0] = arr_even; arrays[1] = arr_odd; return arrays; } int main(int argc, char **argv) { /* Replace the comments in the next two lines with the appropriate arguments. Do not add any additional lines of code to the main function or make other changes. */ int *full_array = build_array(argv[1], argc - 1); int **result = split_array(full_array, sizeof(full_array)); printf("Original array:\n"); for (int i = 0; i < argc - 1; i++) { printf("%d ", full_array[i]); } printf("\n"); printf("result[0]:\n"); for (int i = 0; i < argc / 2; i++) { printf("%d ", result[0][i]); } printf("\n"); printf("result[1]:\n"); for (int i = 0; i < (argc - 1) / 2; i++) { printf("%d ", result[1][i]); } printf("\n"); free(full_array); free(result[0]); free(result[1]); free(result); return 0; }

print out the array at odd and even indices