Datasets:

majeedkazemi

/

students-coding-questions-from-ai-assistant

like 2

63c648f15f004bf4898d012a

2023-03-14T04:05:17.713Z

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 C?

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; }

63c648f15f004bf4898d012a

2023-03-14T04:06:36.406Z

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 C? The answer is not "start inside 8 outside 8"

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; }

63c648f15f004bf4898d012a

2023-03-14T04:10:30.833Z

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 C?

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; }

63c648f15f004bf4898d012a

2023-03-16T00:14:06.829Z

Question from Code

v2

how to fix

Type '{ open: boolean; setOpen: Dispatch<SetStateAction<boolean>>; freqProps: any; perfProps: any; speedup: number; setSpeedup: Dispatch<SetStateAction<number>>; }' is not assignable to type 'IntrinsicAttributes & { open: any; setOpen: any; }' .Property 'freqProps' does not exist on type 'IntrinsicAttributes & { open: any; setOpen: any; }'.139 | open = {open} 140 | setOpen = {setOpen} > 141 | freqProps = {frequencyProps} | ^^^^^^^^^142 | perfProps = { performanceProps} 143 | speedup = {speedup} 144 | setSpeedup = {setSpeedup}

63c648f15f004bf4898d012a

2023-04-04T02:49:22.080Z

General Question

v2

Consider the follow code: subject=CSC Using subject, write a command to output: Last week of CSC209

63c648f15f004bf4898d012a

2023-04-04T02:50:17.773Z

General Question

v2

Consider the follow code: subject=CSC Using subject, write a command in the shell to output: Last week of CSC209

63c648f15f004bf4898d012a

2023-04-22T23:54:12.984Z

Help Fix Code

v2

modify the program so that each process creates exactly one a new process. 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; }

63c648f15f004bf4898d012a

2023-04-23T00:31:07.748Z

Help Fix Code

v2

reads a user id and password from stdin, creates a new process to run the validate program, sends it the user id and password, and prints a message to stdout reporting whether the validation is successful. Your program should use the exit status of the validate program to determine which of the three following messages to print.

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/types.h> #include <sys/wait.h> #define MAXLINE 256 #define SUCCESS "Password verified\n" #define INVALID "Invalid password\n" #define NO_USER "No such user\n" int main(void) { char user_id[MAXLINE]; char password[MAXLINE]; /* The user will type in a user name on one line followed by a password on the next. DO NOT add any prompts. The only output of this program will be one of the messages defined above. Please read the comments in validate carefully */ if(fgets(user_id, MAXLINE, stdin) == NULL) { perror("fgets"); exit(1); } if(fgets(password, MAXLINE, stdin) == NULL) { perror("fgets"); exit(1); } user_id[strcspn(user_id, "\n")] = '\0'; password[strcspn(password, "\n")] = '\0'; // fork process pid_t n = fork(); if (n < 0){ perror("fork"); exit(1); } if (n == 0) { // child process replace with validate program int a = execl("./validate", "validate", NULL); if (a == -1){ perror("execl"); exit(1); } write(STDIN_FILENO, user_id, strlen(user_id) + 1); write(STDIN_FILENO, password, strlen(password)+1); exit(a); } else if (n>0) { // parent process int status; pid_t child_pid = wait(&status); if (child_pid == -1){ perror("wait"); exit(1); } if (WIFEXITED(status)){ int exit_status = WEXITSTATUS(status); if (exit_status == 0){ printf(SUCCESS); } else if (exit_status == 2){ printf(INVALID); } else if (exit_status == 3){ printf(NO_USER); } } } return 0; }

63c648f15f004bf4898d012a

2023-04-23T19:26:27.073Z

General Question

v2

How to make a program that takes an int n, and creates that n amount of processes, where the parent always creates only 1 new process up till n processes

63c648f15f004bf4898d012a

2023-04-23T20:16:39.733Z

Question from Code

v2

Why does my code return: error could not read from stdin

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <sys/wait.h> #include <unistd.h> #define MAXLINE 256 #define SUCCESS "Password verified\n" #define INVALID "Invalid password\n" #define NO_USER "No such user\n" int main(void) { char user_id[MAXLINE]; char password[MAXLINE]; if (fgets(user_id, MAXLINE, stdin) == NULL) { perror("fgets"); exit(1); } if (fgets(password, MAXLINE, stdin) == NULL) { perror("fgets"); exit(1); } user_id[31] = '\0'; password[9] = '\0'; int pipefd[2]; int a = pipe(pipefd); if (a < 0) { perror("pipe"); exit(1); } int n = fork(); if (n < 0) { perror("fork"); exit(1); } else if (n == 0) { close(pipefd[1]); dup2(pipefd[0], STDIN_FILENO); int n = execl("./validate", "validate", NULL); if (n < 0) { perror("execl"); exit(1); } } else { close(pipefd[0]); write(pipefd[1], user_id, sizeof(user_id)); write(pipefd[1], password, sizeof(password)); close(pipefd[1]); int status; wait(&status); if (WIFEXITED(status)) { int n = WEXITSTATUS(status); if (n == 0) { printf(SUCCESS); } else if (n == 2) { printf(INVALID); } else if (n == 3) { printf(NO_USER); } else { printf("Error"); return -1; } } } return 0; }

63c648f35f004bf4898d0139

2023-01-27T02:44:47.300Z

General Question

v1

i have a variable of type *char[10] that I want to pass into a function, how should i write the function call and the parameters?

63c648f35f004bf4898d0139

2023-01-27T04:05:16.198Z

General Question

v1

what is the difference between (*var)[0] and *var[0]

63c648f35f004bf4898d0139

2023-02-03T19:11:43.430Z

General Question

v1

why am I getting this error ../sysdeps/x86_64/multiarch/strcmp-avx2.S: No such file or directory. when I run strcmp

63c648f35f004bf4898d0139

2023-02-03T19:20:10.699Z

Question from Code

v1

why do i get the warning that this is a comparison between pointer and integer?

s[i] == "?"

63c648f35f004bf4898d0139

2023-02-10T23:02:51.298Z

Question from Code

v1

when printing some values from this array, why does it print (0, 0, 0) between each line?

struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) { struct pixel **pixel_data = malloc(height * sizeof(struct pixel *)); fseek(image, pixel_array_offset, SEEK_SET); for (int i = 0; i < height; i++) { pixel_data[i] = malloc(width * sizeof(struct pixel)); for (int j = 0; j < width / 3; j++) { fread(&(pixel_data[i][j].blue), 1, 1, image); fread(&(pixel_data[i][j].green), 1, 1, image); fread(&(pixel_data[i][j].red), 1, 1, image); } } return pixel_data; }

63c648f35f004bf4898d0139

2023-02-11T20:22:58.490Z

Question from Code

v1

given this user struct, when I create a new user will I have to allocate memory on the heap separately for the friends array?

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;

63c648f35f004bf4898d0139

2023-02-11T20:24:01.850Z

Question from Code

v1

given the friends array attribute in the code, how would I add to the array know its current size?

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;

63c648f35f004bf4898d0139

2023-02-11T20:25:01.440Z

Question from Code

v1

how would i add users to the friends array?

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;

63c648f35f004bf4898d0139

2023-02-11T20:25:35.831Z

Question from Code

v1

when iterating through the friends array, how do i know when i reach an empty slot?

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;

63c648f35f004bf4898d0139

2023-02-11T20:53:33.535Z

Question from Code

v1

when i create a new user given this struct, how would i set the friends array to be full of NULL values?

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;

63c648f35f004bf4898d0139

2023-03-03T06:59:40.997Z

Question from Code

v1

how would i modify this code so that new children do not create additional processes? meaning only the original parent calls fork.

#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; }

63c648f35f004bf4898d0139

2023-03-03T07:03:45.811Z

Question from Code

v1

modify the program so that each process creates exactly one a new process

#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; }

63c648f35f004bf4898d0139

2023-03-03T07:04:11.822Z

Help Fix Code

v1

#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 each process creates exactly one a new process

63c648f35f004bf4898d0139

2023-03-03T07:09:30.843Z

Help Fix Code

v1

#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

63c648f35f004bf4898d0139

2023-03-03T07:11:05.199Z

Help Fix Code

v1

#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

63c648f35f004bf4898d0139

2023-03-03T07:38:58.932Z

Help Fix Code

v1

#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; }

each process creates exactly one a new process

63c648f35f004bf4898d0139

2023-03-31T02:22:01.633Z

General Question

v2

how do i clean any newlines from input

63c648f35f004bf4898d0139

2023-04-02T01:54:26.748Z

Question from Code

v2

directive output truncated writing 48 bytes into a region of size between 0 and 2 [-Werror=format-truncation=] why am i getting this warning when compiling

int ret = snprintf(temp2, sizeof(buf), "Name :%s\r\n\r\n------------------------------------------\r\n", user->name);

63c648f35f004bf4898d0139

2023-04-22T23:56:06.139Z

Question from Code

v2

what will be stored in memory after running this line?

char n = 25;

63c648f35f004bf4898d0139

2023-04-23T00:01:19.576Z

Question from Code

v2

what would be printed after running this code?

void fun(int *i, char *j) { *i = *i * 2; *j = *j * 2; } int main() { int m = 25; char n = 25; fun(&m, &n); printf("%d, %c\n", m, n); return 0; }

63c648f35f004bf4898d0139

2023-04-23T00:04:40.272Z

Question from Code

v2

what would be printed from this code?

int main() { double r[] = {5, 6.78, 0.12, 0}; printf("%ld\n", sizeof(r) / sizeof(r[0])); return 0; }

63c648f35f004bf4898d0139

2023-04-23T00:06:45.845Z

Question from Code

v2

what would be printed from this code?

int main() { int number = 16; printf("%d %d\n", number << 2, number >> 2); return 0; }

63c648f35f004bf4898d0139

2023-04-23T00:09:40.258Z

General Question

v2

how can I use a C program to calculate the optimal number of cheese strings I should eat in one day?

63c648f35f004bf4898d013e

2023-01-24T01:35:45.490Z

Explain Code

v1

#include <stdio.h> int main(void){ long n, sum = 0; printf("This program sums a series of integers.\n"); printf("Enter integers (0 to terminate): "); scanf("%ld", &n); while (n!=0){ sum +=n; scanf("%ld", &n); } printf("The sum is: %ld\n",sum); return 0;}

63c648f45f004bf4898d0148

2023-01-26T05:44:08.360Z

Help Fix Code

v1

int **fib(int **fib_squence, int count) { fib_squence = malloc(sizeof(int) * count); int n1 = 0; int n2 = 1; int sum = 0; for (int i = 0; i < count; i++) { fib_squence[i] = sum; sum = n1 + n2; n1 = n2; n2 = sum; } return fib_squence; }

output fibonacci sequence

63c648f45f004bf4898d0148

2023-01-30T04:50:46.026Z

General Question

v1

how to pipe input in c?

63c648f65f004bf4898d0152

2023-01-18T00:25:54.010Z

General Question

v1

explain pointers

63c648f65f004bf4898d0152

2023-01-18T00:36:17.941Z

General Question

v1

Create a function that takes as parameters three numbers which represent a date (day, month, year), and verifies if this date is valid by returning 1 for valid, and 0 for invalid. You will have to check that the year is a positive number, the month is within the correct range, and the day is in the correct range within the month.

63c648f65f004bf4898d0152

2023-01-23T17:56:55.823Z

Explain Code

v1

int main() { // this allocates space for the 2 pointers int **pointers = malloc(sizeof(int *) * 2); // the first pointer points to a single integer pointers[0] = malloc(sizeof(int)); // the second pointer pointes to an array of 3 integers pointers[1] = malloc(sizeof(int) * 3); // let's set their values *pointers[0] = 55; pointers[1][0] = 100; pointers[1][1] = 200; pointers[1][2] = 300; // do other stuff with this memory // now time to free the memory as we are finished with the data-structure // first we need to free the inner pieces free(pointers[0]); free(pointers[1]); // now we can free the space to hold the array of pointers themselves free(pointers); return 0; }

63c648f65f004bf4898d0152

2023-01-23T17:58:09.020Z

General Question

v1

assign a dynamically allocated char * array of length 4

63c648f65f004bf4898d0152

2023-02-27T08:43:11.482Z

Explain Code

v1

int *squares_to_10 = squares(10);

63c648f65f004bf4898d0157

2023-01-17T19:45:37.219Z

Explain Code

v1

#include <stdio.h> #include <stdlib.h> int main(int argc, char **argv) { char phone[11]; int i, len; scanf("%s %d%n", phone, &i, &len); // len = strlen(i); while (i != EOF && len == 1) { if (i < -1 || i > 9) { printf("ERROR\n"); return 1; } else if (i == -1) { printf("%s\n", phone); } else { printf("%c\n", phone[i]); } scanf(" %d%n", &i, &len); } return 0; }

63c648f65f004bf4898d0157

2023-01-17T19:46:55.075Z

Help Fix Code

v1

#include <stdio.h> #include <stdlib.h> int main(int argc, char **argv) { char phone[11]; int i, len; scanf("%s %d%n", phone, &i, &len); // len = strlen(i); while (i != EOF && len == 1) { if (i < -1 || i > 9) { printf("ERROR\n"); return 1; } else if (i == -1) { printf("%s\n", phone); } else { printf("%c\n", phone[i]); } scanf(" %d%n", &i, &len); } return 0; }

stop while loop when end-of-file reached with scanf

63c648f65f004bf4898d0157

2023-01-17T20:35:07.313Z

Explain Code

v1

char *result[2];

63c648f65f004bf4898d0157

2023-01-17T20:35:53.581Z

Explain Code

v1

char *result[2]; x = result[0];

63c648f65f004bf4898d0157

2023-01-17T20:52:59.770Z

Explain Code

v1

#include <stdio.h> #include <stdlib.h> int main(int argc, char **argv) { char phone[11]; int i; if (scanf("%10s %d", phone, &i) != 2) { return 0; } do { if (i < -1 || i > 9) { printf("ERROR\n"); return 1; } else if (i == -1) { printf("%s\n", phone); } else { printf("%c\n", phone[i]); } } while (scanf(" %d", &i) == 1); return 0; }

63c648f65f004bf4898d0157

2023-01-23T21:58:17.408Z

Question from Code

v1

why doesn't size take the value argc - 1

int *build_array(char **strs, int size) { int *arr = malloc(size * sizeof(int)); for (int i = 0; i < size; i++) { arr[i] = strtol(strs[i + 1], NULL, 10); } return arr; } int main(int argc, char **argv) { int *full_array = build_array(argv, argc - 1); return 0; }

63c648f65f004bf4898d0157

2023-01-23T21:59:08.589Z

Explain Code

v1

int *build_array(char **strs, int size) { int *arr = malloc(size * sizeof(int)); for (int i = 0; i < size; i++) { arr[i] = strtol(strs[i + 1], NULL, 10); } return arr; } int main(int argc, char **argv) { int *full_array = build_array(argv, argc - 1); return 0; }

63c648f65f004bf4898d0157

2023-01-25T17:44:17.017Z

Help Fix Code

v1

int s = scanf("%*c%9s %*d %*s %*s %d %*s %*d %*s %s", perms, &size, name);

parse input from ls -l

63c648f85f004bf4898d016b

2023-02-07T19:42:34.563Z

General Question

v1

what is a string literal

63c648f85f004bf4898d016b

2023-02-07T20:21:50.865Z

General Question

v1

how to use time and ctime functions to find the current time and convert a time value to a string

63c648f85f004bf4898d016b

2023-02-07T20:34:48.266Z

General Question

v1

what are the return values for fopen

63c648f85f004bf4898d016b

2023-02-09T19:33:28.227Z

General Question

v1

how to use time_t to save the current time

63c648f85f004bf4898d016b

2023-02-12T02:29:06.928Z

Question from Code

v1

how to output the printf

#include <stdio.h> int main() { #ifdef MACRO printf("%d\n", MACRO); #endif return 0; }

63c648f85f004bf4898d016b

2023-02-12T02:29:38.953Z

General Question

v1

when is MACRO defined in preprocessor

63c648f85f004bf4898d016b

2023-02-12T02:31:28.805Z

Question from Code

v1

How to compile this code and have it print 5

#include <stdio.h> int main() { #ifdef MACRO printf("%d\n", MACRO); #endif return 0; }

63c648f85f004bf4898d016b

2023-02-12T02:34:28.618Z

Question from Code

v1

What will this declaration line become after the program has passed through the C pre-processor?

#define MAXNAME = 32; char name[MAXNAME];

63c648f85f004bf4898d016b

2023-02-12T02:38:00.462Z

Question from Code

v1

what is the value of MAXNAME

#define MAXNAME = 32; char name[MAXNAME];

63c648f85f004bf4898d016b

2023-02-12T03:08:16.528Z

General Question

v1

what does ? mean in C

63c648f85f004bf4898d016b

2023-02-12T03:21:47.541Z

Question from Code

v1

What will be the output of the following program fragment?

#define SUPERVISOR(regular) regular + 5 int main() { int regular_pay = 20; int hours_worked = 10; printf("pay is %d\n", (hours_worked * SUPERVISOR(regular_pay))); }

63c648f85f004bf4898d016b

2023-02-12T03:26:37.642Z

Question from Code

v1

what does this do

#define SUPERVISOR(regular) regular + 5

63c648f85f004bf4898d016b

2023-02-12T15:38:00.404Z

General Question

v1

what does stat do

63c648f85f004bf4898d016b

2023-02-13T16:27:59.349Z

General Question

v1

how to write function prototypes for helper functions at top of file

63c648f85f004bf4898d016b

2023-02-23T19:52:55.621Z

General Question

v1

what type is string literal

63c648f85f004bf4898d016b

2023-02-23T19:53:20.585Z

General Question

v1

what is the difference between string literal and string variable

63c648f85f004bf4898d016b

2023-02-24T15:31:29.351Z

General Question

v1

what does wait do

63c648f85f004bf4898d016b

2023-02-24T21:16:11.920Z

General Question

v1

What does the command-line arguments -k 3 myfile mean .

63c648f85f004bf4898d016b

2023-02-25T02:04:57.680Z

General Question

v1

what is size_t

63c648f85f004bf4898d016b

2023-02-25T02:20:56.785Z

General Question

v1

what does fread do

63c648f85f004bf4898d016b

2023-02-25T15:30:05.684Z

General Question

v1

what is a zombie process

63c648f85f004bf4898d016b

2023-02-25T15:51:13.285Z

General Question

v1

what is a environment

63c648f85f004bf4898d016b

2023-02-26T17:58:17.876Z

General Question

v1

what does % mean in makefile

63c648f85f004bf4898d016b

2023-03-12T21:05:13.161Z

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?

#include <signal.h> #include <stdio.h> 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; }

63c648f85f004bf4898d016b

2023-03-12T21:13:48.381Z

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 C?

#include <signal.h> #include <stdio.h> 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; }

63c648f85f004bf4898d016b

2023-03-19T23:55:42.217Z

General Question

v2

What would we pass in as the type argument for socket() if we wanted to support datagrams? (Use the man page for socket to look this up.)

63c648f85f004bf4898d016b

2023-04-02T15:49:10.294Z

General Question

v2

echo I live at $1 $2 $3. shift echo Now, I live at $0 $1 $2. Suppose I run the script as follows: sh shifter.sh 100 University Ave What does it output?

63c648fa5f004bf4898d017f

2023-01-24T17:31:55.378Z

Help Fix Code

v1

int *build_array(char **strs, int size) { int *test; test = malloc(sizeof(int) * size); for (int i = 0; i < size; i ++){ test[i] = strtol(*strs, strs, 10); } }

63c648fa5f004bf4898d017f

2023-01-24T17:33:03.139Z

Help Fix Code

v1

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

It is supposed to convert a string input of arrays into an array of ints

63c648fa5f004bf4898d017f

2023-01-24T17:36:17.086Z

Help Fix Code

v1

int *build_array(char **strs, int size) { int *test; test = malloc(sizeof(int) * size); for (int i = 0; i < size; i ++){ test[i] = strtol(*strs, strs, 10); } return test; } main(int argc, char **argv){ int *full_array = build_array(&ar[1], argc - 1); return 0; }

This code is supposed to set full_array to an integer array made of the string values inputted from command line.

63c648fa5f004bf4898d017f

2023-02-14T23:33:09.378Z

Question from Code

v1

why does my code segmentation fault

int make_post(const User *author, User *target, char *contents) { if (author == NULL || target == NULL) { return 2; } int success = 1; for (int i = 0; i < MAX_FRIENDS; i++) { if (target->friends[i] != NULL && strcmp(target->friends[i]->name, author->name) == 0) { success = 0; } } if (success == 0) { Post *new_post = malloc(sizeof(Post)); strncpy(new_post->author, author->name, strlen(author->name) + 1); strncpy(new_post->contents, contents, strlen(contents) + 1); *(new_post->date) = time(NULL); new_post->next = target->first_post; target->first_post = new_post; } return success; }

63c648fa5f004bf4898d017f

2023-02-14T23:53:43.182Z

Question from Code

v1

Why does this function segmentation fault

int make_post(const User *author, User *target, char *contents) { if (author == NULL || target == NULL) { return 2; } int success = 1; for (int i = 0; i < MAX_FRIENDS; i++) { if (target->friends[i] != NULL && strcmp(target->friends[i]->name, author->name) == 0) { success = 0; } } if (success == 0) { Post *new_post = malloc(sizeof(Post)); new_post->date = malloc(sizeof(time_t)); strncpy(new_post->author, author->name, strlen(author->name) + 1); strncpy(new_post->contents, contents, strlen(contents) + 1); *(new_post->date) = time(NULL); new_post->next = target->first_post; target->first_post = new_post; } return success; }

63c648fb5f004bf4898d0184

2023-01-20T05:06:25.264Z

Question from Code

v1

address

int n = 1;

63c648fb5f004bf4898d0184

2023-01-20T05:07:14.830Z

Explain Code

v1

int n = 1; int b = n;

63c648fb5f004bf4898d0184

2023-01-20T05:07:39.752Z

General Question

v1

address of 1 and 2

63c648fb5f004bf4898d0184

2023-01-20T05:08:22.588Z

Help Write Code

v1

address of line 1 and line 2

63c648fb5f004bf4898d0184

2023-01-20T05:11:51.262Z

Question from Code

v1

result

int a = 1; int *p = &a; printf(%d, p); a = 3; printf(%d, *p); printf(%d, p)

63c648fd5f004bf4898d0193

2023-02-11T23:59:37.324Z

Help Fix Code

v1

/* * 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) { // initialize variables for linked list traversal User *current = *user_ptr_del; User *prev = NULL; // search for the user to delete while (current != NULL && strcmp(current->name, name) != 0) { prev = current; current = current->next; } // if user was not found if (current == NULL) { return 1; } // Remove user from every friend list int i, j; for (i = 0; i < MAX_FRIENDS; i++) { if (current->friends[i] == NULL) { break; } for (j = 0; j < MAX_FRIENDS; j++) { if (current->friends[i]->friends[j] == current) { current->friends[i]->friends[j] = NULL; break; } } } // remove user from list if (prev == NULL) { *user_ptr_del = current->next; } else { prev->next = current->next; } // free dynamically allocated memory for the user's posts Post *post = current->first_post; while (post != NULL) { Post *temp = post; // use a temporary variable post = post->next; free(temp->contents); free(temp); } free(current); // free the user's allocated memory return 0; // return 0 on success }

frees all allocated memory

63c648fd5f004bf4898d0198

2023-02-03T21:25:04.988Z

Question from Code

v1

If there any error in the code

int main(int argc, char *argv[]) { if (argc != 3) { fprintf(stderr, "Usage: greeting message name\n"); return 1; } char greeting[20]; char *name = argv[2]; // Your code goes here int greet_len = strlen(argv[1]); // Size of greeting is bigger than 20 if (greet_len >= 19){ strncpy(greeting, argv[1], sizeof(greeting)); greeting[19] = '\0'; } else{ strncpy(greeting, argv[1], sizeof(greeting)); greeting[greet_len] = ' '; strncat(greeting, name, sizeof(greeting) - greet_len - 1); greeting[19] = '\0'; } printf("%s\n", greeting); return 0; }

63c648fd5f004bf4898d0198

2023-02-03T21:26:46.016Z

Explain Code

v1

int main(int argc, char *argv[]) { if (argc != 3) { fprintf(stderr, "Usage: greeting message name\n"); return 1; } char greeting[20]; char *name = argv[2]; // Your code goes here int greet_len = strlen(argv[1]); // Size of greeting is bigger than 20 if (greet_len >= 19){ strncpy(greeting, argv[1], sizeof(greeting)); greeting[19] = '\0'; } else{ strncpy(greeting, argv[1], sizeof(greeting)); greeting[greet_len] = ' '; strncat(greeting, name, sizeof(greeting) - greet_len - 1); greeting[19] = '\0'; } printf("%s\n", greeting); return 0; }

63c648ff5f004bf4898d01ac

2023-01-24T00:42:21.622Z

Question from Code

v1

what's wrong with the code?

#include <stdio.h> #include <stdlib.h> int main(){ int allocated_memory; allocated_memory = malloc(sizeof(float)); return 0; }

63c648ff5f004bf4898d01ac

2023-01-24T00:43:37.063Z

Help Fix Code

v1

#include <stdio.h> #include <stdlib.h> int main(){ int allocated_memory; allocated_memory = malloc(sizeof(float)); return 0; }

allocate space for allocated_memory

63c648ff5f004bf4898d01ac

2023-03-10T19:43:33.506Z

General Question

v2

what are pipes

63c648ff5f004bf4898d01ac

2023-03-10T19:44:18.911Z

General Question

v2

Explain execl

63c648ff5f004bf4898d01ac

2023-03-10T19:45:15.454Z

General Question

v2

Does execl end a program?

63c648ff5f004bf4898d01ac

2023-03-10T19:45:52.407Z

General Question

v2

execl example program

63c648ff5f004bf4898d01ac

2023-03-10T19:48:00.783Z

General Question

v2

pipe write example

63c648ff5f004bf4898d01ac

2023-03-17T02:33:43.911Z

General Question

v2

what random libraries are there?

63c648ff5f004bf4898d01ac

2023-03-17T02:34:54.261Z

General Question

v2

how do I set the RANDMAX for the random()

63c648ff5f004bf4898d01ac

2023-03-17T03:01:10.412Z

General Question

v2

how does fseek work

63c648ff5f004bf4898d01ac

2023-03-17T03:05:28.668Z

General Question

v2

what does Fread return