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1.24k
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stringlengths 1
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stringlengths 18
3.32k
⌀ |
|---|---|---|---|---|---|---|---|
63c648335f004bf4898cfa5e | 2023-02-14T09:13:56.357Z | General Question | v1 | what does the %s format specifier match? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T09:19:03.091Z | General Question | v1 | what does fscanf return? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T09:22:33.453Z | General Question | v1 | is there a way for scanf to also read the whitespace and newlines from a file? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T09:30:28.918Z | General Question | v1 | what does the format specifier %s match in printf?
| null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T09:40:51.820Z | General Question | v1 | how are time_t values printed? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T09:42:17.793Z | General Question | v1 | please provide an example and the printed result of setting the value of a time_t variable and calling printf using the %s format specifier. | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T09:43:37.301Z | General Question | v1 | generate a detailed documentation of `time_t now; time(&now); printf("%s", ctime(&now));` with usage examples and explanations | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T09:54:55.411Z | General Question | v1 | does the keyword "time" denote the current time? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T16:38:12.597Z | General Question | v1 | does C have a data type for booleans? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T16:48:35.714Z | General Question | v1 | how would I initialize a variable to the current time? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T17:25:24.226Z | General Question | v1 | When an if statement contains an &&, is the left hand side of that && always evaluated first?
| null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T19:17:08.167Z | General Question | v1 | when malloc allocates memory for a struct, does it allocate memory for all of the variables in the struct? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-14T19:44:50.073Z | General Question | v1 | how would I obtain a line from a file up to a newline character and send that value to a string using fscanf? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-15T01:32:29.140Z | General Question | v1 | does the exit() function terminate the program?
| null | null | null |
63c648335f004bf4898cfa5e | 2023-02-15T01:35:27.639Z | General Question | v1 | is there a format character that matches a string of unknown length? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-15T20:12:06.136Z | General Question | v1 | does strncpy add the null terminator at the end of the string it's copying or when it hits the provided argument for number of characters | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-15T20:30:37.635Z | General Question | v1 | does fgets need to copy to a pointer to heap allocated memory? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-16T20:00:04.691Z | General Question | v1 | what is the difference between size_t and int? | null | null | null |
63c648335f004bf4898cfa5e | 2023-02-28T04:00:53.350Z | General Question | v1 | are unassigned chars treated as null terminators? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-07T20:43:14.382Z | General Question | v1 | what does wait return if it fails? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-13T20:52:31.936Z | General Question | v2 | where can I find the man page for strtok?
| null | null | null |
63c648335f004bf4898cfa5e | 2023-03-13T20:56:40.631Z | General Question | v2 | what can I use to read through a file line by line? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-13T21:12:13.408Z | General Question | v2 | how do I initialize an array of n elements in c? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-13T22:21:33.374Z | General Question | v2 | what is the tab character in c? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-13T22:22:49.072Z | General Question | v2 | is it safe to declare and assign a variable inside of a loop? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-13T22:39:24.915Z | General Question | v2 | does C have do while loops? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-14T01:07:34.230Z | General Question | v2 | how can I remove \n and \r characters from a string? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-14T01:18:08.720Z | General Question | v2 | how can I remove a newline character from the end of a string? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-14T01:20:40.271Z | General Question | v2 | does fgets stop when it reaches a newline? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-14T01:39:07.541Z | General Question | v2 | what does malloc return if it fails? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-14T20:48:16.590Z | General Question | v2 | how can I obtain the contents of a string after a certain index? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-14T20:49:24.216Z | General Question | v2 | does strtok return the content of the string before or after the delimiter? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-14T22:35:46.904Z | General Question | v2 | how do I declare an array of strings in C? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-14T22:43:56.110Z | General Question | v2 | does strtok automatically stop at null pointers? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-14T23:40:37.478Z | General Question | v2 | is there a type signature that represents any given pointer? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T00:43:55.849Z | General Question | v2 | what does strtok return if it never reads the delimiter? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T00:45:07.267Z | General Question | v2 | does fgets include the \n? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T00:49:23.990Z | General Question | v2 | is there a way to replace the value of a character in a read-only string? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T00:51:34.074Z | General Question | v2 | what does strcspn do? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T12:40:52.704Z | General Question | v2 | does stat require that the input statbuf is allocated with memory, or is it sufficient to simply declare a buffer pointer? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T13:07:22.122Z | General Question | v2 | how can I compare two st_mtime structs? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T13:55:54.555Z | General Question | v2 | if my program runs into an error, should I use perror or fprintf to stderr? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T14:31:17.460Z | General Question | v2 | does memory need to be de-allocated from a child process that has terminated and been waited for? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T15:08:52.225Z | General Question | v2 | can I use strncat in one function to change the contents of an array that was passed in from a different function? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T15:13:55.290Z | General Question | v2 | Is there any way to directly find the size taken up by a pointer/array in memory? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T15:32:40.255Z | General Question | v2 | what does fork take as an input?
| null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T15:44:57.834Z | General Question | v2 | could you please provide an example of using execvp to run a string of shell commands in the current directory? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T16:28:20.743Z | General Question | v2 | is execvp a system call? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T16:37:46.366Z | General Question | v2 | what should be done if WIFEXITED returns false? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T17:15:03.048Z | General Question | v2 | what character represents a string in printf? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T18:58:43.827Z | General Question | v2 | how can I copy the values of object stored in one pointer to a struct to another pointer to the same struct? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T20:20:56.691Z | General Question | v2 | how do I make an instance of struct timespec with value 0? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-15T20:29:51.047Z | General Question | v2 | does dereferencing a null pointer produce segmentation fault? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-22T00:45:42.212Z | General Question | v2 | how can I confirm whether or not a certain index of an array is empty | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-22T01:06:03.073Z | General Question | v2 | how does memmove work? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-22T06:28:21.656Z | General Question | v2 | how can I tell if memory has been allocated for a variable? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-24T18:53:49.225Z | General Question | v2 | what inputs are taken by the write system call? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-24T18:55:24.549Z | General Question | v2 | does strcat replace a null terminator at the end of the destination? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-24T19:31:10.770Z | General Question | v2 | if I have an array of chars named charr which ends in a null terminator (and only has the terminator at its last index), is sizeof(charr) - 1 the same as strlen(charr)? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-24T19:52:27.387Z | General Question | v2 | what does FD_SET do? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-24T19:58:29.778Z | General Question | v2 | what is the fd for stdin? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-25T02:27:19.511Z | General Question | v2 | does strcpy add a newline to a string? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-25T02:28:18.527Z | General Question | v2 | does read terminate on network newlines? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-25T02:32:15.493Z | General Question | v2 | does wsl automatically add network newlines when the enter key is pressed? | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-25T02:38:03.505Z | General Question | v2 | does wsl automatically add newlines when the enter key is pressed | null | null | null |
63c648335f004bf4898cfa5e | 2023-03-25T02:41:14.218Z | General Question | v2 | does pressing enter on a line add a newline? | null | null | null |
63c648335f004bf4898cfa5e | 2023-04-06T07:58:23.030Z | General Question | v2 | does strcat work with dynamically allocated strings? | null | null | null |
63c648335f004bf4898cfa5e | 2023-04-06T08:01:08.994Z | General Question | v2 | can I create an array with a variable value for its size? | null | null | null |
63c648335f004bf4898cfa5e | 2023-04-06T08:22:46.143Z | General Question | v2 | can read only strings be used at source inputs for strcat? | null | null | null |
63c648335f004bf4898cfa5e | 2023-04-06T10:36:17.635Z | General Question | v2 | what is a reasonable maximum size for a buffer? | null | null | null |
63c648335f004bf4898cfa5e | 2023-04-25T20:21:04.946Z | General Question | v2 | whats the difference between open and fopen? | null | null | null |
63c648355f004bf4898cfa72 | 2023-02-11T04:31:45.386Z | General Question | v1 | HOW do I find the number of items in an array
| null | null | null |
63c648365f004bf4898cfa7c | 2023-01-27T13:52:30.532Z | Explain Code | v1 | null | void fib(int **fib_sequence, int count) {
fib_sequence = malloc(sizeof(int*) * count);
for (int i = 0; i<count; i++){
fib_sequence[i] = malloc(sizeof(int));
}
// *fib_sequence[0] = 5;
// printf("%d\n", *fib_sequence[0]);
int x = 0;
int y = 1;
int temp;
for (int i = 0; i < count; i++) {
(*fib_sequence)[i] = x;
temp = x;
x = y;
y = temp + y;
}
} | null | null |
63c648385f004bf4898cfa90 | 2023-02-07T05:12:45.417Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
struct pixel **pixels = malloc(sizeof(struct pixel*) * height);
for (int i = 0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel*) * width);
}
for (int m = 0; m < height; m++) {
for (int n = 0; n < width; n++) {
fread(&pixels[m][n], sizeof(struct pixel), pixel_array_offset, image);
}
}
return pixels;
} | First, allocate space for m `struct pixel *` values, where m is the height of the image. Each pointer will eventually point to one row of pixel data. For each pointer you just allocated, initialize it to point to Use the given file and pixel_array_offset to initialize the actual struct pixel values. Assume that `sizeof(struct pixel) == 3`, which is consistent with the bitmap file format. Return the address of the first `struct pixel *` you initialized. | null |
63c648385f004bf4898cfa90 | 2023-02-07T05:13:49.271Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
struct pixel **pixels = malloc(sizeof(struct pixel*) * height);
for (int i = 0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
}
for (int m = 0; m < height; m++) {
for (int n = 0; n < width; n++) {
fread(&pixels[m][n], sizeof(struct pixel), pixel_array_offset, image);
}
}
return pixels;
} | First, allocate space for m `struct pixel *` values, where m is the height of the image. Each pointer will eventually point to one row of pixel data. For each pointer you just allocated, initialize it to point to Use the given file and pixel_array_offset to initialize the actual struct pixel values. Assume that `sizeof(struct pixel) == 3`, which is consistent with the bitmap file format. Return the address of the first `struct pixel *` you initialized. | null |
63c648385f004bf4898cfa90 | 2023-02-07T05:16:14.063Z | Explain Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
struct pixel **pixels = malloc(sizeof(struct pixel*) * height);
for (int i = 0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
}
for (int m = 0; m < height; m++) {
for (int n = 0; n < width; n++) {
fread(&pixels[m][n], sizeof(struct pixel), pixel_array_offset, image);
}
}
return pixels;
} | null | null |
63c648395f004bf4898cfa95 | 2023-01-23T22:39:16.141Z | Question from Code | v1 | how does char *leftover get assigned to to " " character after "-17" in s? | int main() {
//char *s = "17";
char *s = " -17";
int i = strtol(s, NULL, 10);
printf("i has the value %d\n", i);
s = " -17 other junk.";
char *leftover;
i = strtol(s, &leftover, 10);
printf("i has the value %d\n", i);
printf("leftover has the value %s\n", leftover);
return 0;
} | null | null |
63c648395f004bf4898cfa95 | 2023-01-26T19:50:19.804Z | Question from Code | v1 | why does this not compile?
| void fib(int **pfib_sequence, int count){
int *fib_sequence = *pfib_sequence;
fib_sequence[0] = malloc(sizeof(int) * count);
} | null | null |
63c648395f004bf4898cfa95 | 2023-01-26T19:51:47.273Z | General Question | v1 | do we always need to cast malloc to the appropriate data type? Is there ever a time we want to return void *? | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-26T20:02:35.488Z | General Question | v1 | how to cast malloc to int *
| null | null | null |
63c648395f004bf4898cfa95 | 2023-01-26T20:06:33.552Z | Question from Code | v1 | why doesn't this compile? | void fib(int **pfib_sequence, int count){
int *fib_sequence = *pfib_sequence;
fib_sequence[0] = malloc(sizeof(int) * count);
}void fib(int **pfib_sequence, int count){
int *fib_sequence = *pfib_sequence;
fib_sequence = (int *)malloc(sizeof(int) * count);
int t_1 = 0;
int t_2 = 1;
for (int i = 0; i < count; i++){
if(i == 0){
*fib_sequence[i] = 0;
} else if(i == 1){
*fib_sequence[i] = 1;
} else {
*fib_sequence[i] = t_1 + t_2;
t_1 = t_2;
t_2 = *fib_sequence[i];
}
printf("%d", *fib_sequence[i]);
}
}
| null | null |
63c648395f004bf4898cfa95 | 2023-01-26T20:07:56.059Z | Question from Code | v1 | why doesn't this compile? | void fib(int **pfib_sequence, int count){
int *fib_sequence = *pfib_sequence;
fib_sequence[0] = (int *)malloc(sizeof(int) * count);
}void fib(int **pfib_sequence, int count){
int *fib_sequence = *pfib_sequence;
fib_sequence = (int *)malloc(sizeof(int) * count);
int t_1 = 0;
int t_2 = 1;
for (int i = 0; i < count; i++){
if(i == 0){
*fib_sequence[i] = 0;
} else if(i == 1){
*fib_sequence[i] = 1;
} else {
*fib_sequence[i] = t_1 + t_2;
t_1 = t_2;
t_2 = *fib_sequence[i];
}
printf("%d", *fib_sequence[i]);
}
}
| null | null |
63c648395f004bf4898cfa95 | 2023-01-26T20:08:40.600Z | Question from Code | v1 | why doesn't this compile
| void fib(int **pfib_sequence, int count){
int *fib_sequence = *pfib_sequence;
fib_sequence = (int *)malloc(sizeof(int) * count);
int t_1 = 0;
int t_2 = 1;
for (int i = 0; i < count; i++){
if(i == 0){
*fib_sequence[i] = 0;
} else if(i == 1){
*fib_sequence[i] = 1;
} else {
*fib_sequence[i] = t_1 + t_2;
t_1 = t_2;
t_2 = *fib_sequence[i];
}
printf("%d", *fib_sequence[i]);
}
}
| null | null |
63c648395f004bf4898cfa95 | 2023-01-26T20:36:55.955Z | General Question | v1 | what is the difference between an array and a pointer in C? | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-26T20:38:19.383Z | General Question | v1 | does [i] syntax work for all pointers in C? | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-26T20:39:12.503Z | General Question | v1 | why do we make the function parameter type int * instead of int[]? | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-26T22:36:55.113Z | Question from Code | v1 | why does this not compile? | int *arr[3];
printf("%d\n", sizeof(arr)); | null | null |
63c648395f004bf4898cfa95 | 2023-01-26T22:47:32.078Z | Question from Code | v1 | does this compile? | int arr[2];
arr[2] = 1; | null | null |
63c648395f004bf4898cfa95 | 2023-01-26T22:48:19.698Z | General Question | v1 | does integer division round down? | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-27T03:29:09.154Z | General Question | v1 | split_array.c:66:12: warning: address of stack memory associated with local variable 'arr' returned [-Wreturn-stack-address]
why would i get this warning? | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-27T03:33:10.267Z | General Question | v1 | what gives this error?
split_array.c:29:9: error: variable-sized object may not be initialized
int odd_array[odd_length] = (int *)malloc(sizeof(int) * odd_length); | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-27T03:53:02.607Z | General Question | v1 | for the command line prompt ./a.out 1 2 3 4 5
why does strtol(argv[0], NULL, 10) return 0? | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-28T02:37:47.766Z | General Question | v1 | can we use scan f to only read from the n'th line of stdin? | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-28T02:38:32.372Z | General Question | v1 | what about scanf("%[^\n]d", &number); | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-28T02:39:16.719Z | General Question | v1 | is there a way of reading a string of characters until k newline characters are encountered | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-28T02:40:15.687Z | General Question | v1 | as in is there something like scanf("%[^n]*k %d", &number); to get the first integer after k new lines | null | null | null |
63c648395f004bf4898cfa95 | 2023-01-28T02:55:29.171Z | Question from Code | v1 | does this compile? why not? | scanf("%[^\n]*3 %d", &in); | null | null |
63c648395f004bf4898cfa95 | 2023-01-28T02:56:45.362Z | Question from Code | v1 | does this compile? | scanf("%[^n]*k %d%n", &number, &number_of_characters_read); | null | null |
63c648395f004bf4898cfa95 | 2023-01-28T02:57:31.967Z | Question from Code | v1 | does this compile | int number;
int number_of_characters_read;
scanf("%[^n]*k %d%n", &number, &number_of_characters_read); | null | null |
63c648395f004bf4898cfa95 | 2023-01-28T02:57:56.827Z | Question from Code | v1 | does this compile? what does it do? | int number;
int number_of_characters_read;
scanf("%[^n]*k %d%n", &number, &number_of_characters_read); | null | null |
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