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stringlengths 1
1.24k
⌀ | input_code
stringlengths 2
18.5k
⌀ | input_intention
stringlengths 1
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⌀ | input_task_description
stringlengths 18
3.32k
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|---|---|---|---|---|---|---|---|
63c648a65f004bf4898cfe6e | 2023-02-08T03:46:16.613Z | Question from Code | v1 | 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. | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
| null | null |
63c648a65f004bf4898cfe6e | 2023-02-08T03:48:16.549Z | Question from Code | v1 | allocate an array of struct pixel * pointers, each of which will point to a row of pixels.
| struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
| null | null |
63c648a65f004bf4898cfe6e | 2023-02-08T03:48:48.390Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
| allocate an array of struct pixel * pointers, each of which will point to a row of pixels.
| null |
63c648a65f004bf4898cfe6e | 2023-02-08T03:49:57.269Z | Question from Code | v1 | 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. | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
// 1.
struct pixel *pixels;
// 2.
for (int i=0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
} | null | null |
63c648a65f004bf4898cfe6e | 2023-02-08T03:50:28.205Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
// 1.
struct pixel *pixels;
// 2.
for (int i=0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
} | 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. | null |
63c648a65f004bf4898cfe6e | 2023-02-08T03:52:00.981Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
// 1.
struct pixel *pixels = malloc(sizeof(struct pixel) * height);
// 2.
for (int i=0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
}
| For each pointer you just allocated, initialize it to point to heap-allocated space for an entire row of pixel data. | null |
63c648a65f004bf4898cfe6e | 2023-02-08T03:54:23.238Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
// 1.
struct pixel **pixels = malloc(sizeof(struct pixel *) * height);
// 2.
for (int i=0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
}
// 3.
while (sizeof(struct pixel) == 3) {
}
} | check that sizeof(struct pixel) == 3 | null |
63c648a65f004bf4898cfe6e | 2023-02-08T03:55:18.226Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
// 1.
struct pixel **pixels = malloc(sizeof(struct pixel *) * height);
// 2.
for (int i=0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
}
// 3.
while (sizeof(struct pixel) == 3) {
}
} | Use the given file and pixel_array_offset to initialize the actual struct pixel values | null |
63c648a65f004bf4898cfe6e | 2023-02-08T04:02:57.983Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
// 1.
struct pixel **pixels = malloc(sizeof(struct pixel *) * height);
// 2.
for (int i=0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
}
// 3.
while (sizeof(struct pixel) == 3) {
}
} | free the program's dynamically allocated memory | null |
63c648a65f004bf4898cfe6e | 2023-02-08T04:03:45.933Z | Question from Code | v1 | free dymanically allocated memory using free | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
// 1.
struct pixel **pixels = malloc(sizeof(struct pixel *) * height);
// 2.
for (int i=0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
}
} | null | null |
63c648a65f004bf4898cfe6e | 2023-02-08T04:04:50.344Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
// 1.
struct pixel **pixels = malloc(sizeof(struct pixel *) * height);
// 2.
for (int i=0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
}
} | use free function to free memory | null |
63c648a65f004bf4898cfe6e | 2023-02-08T18:37:37.456Z | Help Fix Code | v1 | null | void read_bitmap_metadata(FILE *image, int *pixel_array_offset, int *width, int *height) {
image = fopen(image, "r"); | fix incompatible pointer types passing 'FILE *' (aka 'struct __sFILE *') to parameter of type 'const char *' [-Wincompatible-pointer-types] | null |
63c648a65f004bf4898cfe6e | 2023-02-08T18:38:15.063Z | Help Fix Code | v1 | null | void read_bitmap_metadata(FILE *image, int *pixel_array_offset, int *width, int *height) {
fopen(image, "r"); | incompatible pointer types passing 'FILE *' (aka 'struct __sFILE *') to parameter of type 'const char *' [-Wincompatible-pointer-types] | null |
63c648a65f004bf4898cfe6e | 2023-02-08T18:39:15.743Z | Question from Code | v1 | fix incompatible pointer types passing 'FILE *' to parameter of type 'const char *' | void read_bitmap_metadata(FILE *image, int *pixel_array_offset, int *width, int *height) {
image = fopen(image, "r"); | null | null |
63c648a65f004bf4898cfe6e | 2023-02-08T18:39:47.978Z | Question from Code | v1 | open image using fopen | void read_bitmap_metadata(FILE *image, int *pixel_array_offset, int *width, int *height) {
image = fopen(image, "r"); | null | null |
63c648a65f004bf4898cfe6e | 2023-02-08T18:40:11.814Z | Help Fix Code | v1 | null | void read_bitmap_metadata(FILE *image, int *pixel_array_offset, int *width, int *height) {
image = fopen(image, "r"); | open file image using fopen | null |
63c648a65f004bf4898cfe6e | 2023-02-09T02:41:54.352Z | Help Fix Code | v1 | null | int create_user(const char *name, User **user_ptr_add) {
struct user new_user;
strcpy(new_user.name, name); | iterate through list of user structs | null |
63c648a65f004bf4898cfe6e | 2023-02-09T02:46:40.100Z | Question from Code | v1 | iterat through user_ptr_add which is list of user structs | int create_user(const char *name, User **user_ptr_add) {
struct user new_user;
strcpy(new_user.name, name); | null | null |
63c648a65f004bf4898cfe6e | 2023-02-09T03:52:51.388Z | Help Fix Code | v1 | null | int create_user(const char *name, User **user_ptr_add) {
struct user new_user;
strcpy(new_user.name, name); | iterate through list of user structs, and add new_user to end of list | null |
63c648a65f004bf4898cfe6e | 2023-02-09T03:53:55.800Z | Help Fix Code | v1 | null | int create_user(const char *name, User **user_ptr_add) {
struct user new_user;
strcpy(new_user.name, name);
new_user.next = NULL;
| how to iterate to end of user_ptr_add and insert new_user at tail of list | null |
63c648a65f004bf4898cfe6e | 2023-02-09T03:56:22.863Z | Help Fix Code | v1 | null | int create_user(const char *name, User **user_ptr_add) {
struct user new_user;
strcpy(new_user.name, name);
new_user.next = NULL;
| how to iterate to end of user_ptr_add | null |
63c648a65f004bf4898cfe6e | 2023-02-09T04:04:21.753Z | Help Fix Code | v1 | null | void list_users(const User *curr) {
while (curr != NULL) {
printf("%s\n", curr.name);
curr = curr->next;
}
} | Print the usernames of all users in the list starting at curr. Names should be printed to standard output, one per line. | null |
63c648a65f004bf4898cfe6e | 2023-02-09T19:51:45.987Z | Help Fix Code | v1 | null | struct pixel **read_pixel_array(FILE *image, int pixel_array_offset, int width, int height) {
// 1.
struct pixel **pixels = malloc(sizeof(struct pixel *) * height);
// 2 - 3
for (int i = 0; i < height; i++) {
pixels[i] = malloc(sizeof(struct pixel) * width);
while (sizeof(struct pixel) == 3) {
fread(&pixels, sizeof(struct pixel), 3, image);
}
}
// 4.
return pixels;
} | Use the given file and pixel_array_offset to initialize the actual struct pixel values | null |
63c648a65f004bf4898cfe6e | 2023-02-11T14:59:31.215Z | General Question | v1 | get number of elements in a linked list | null | null | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:14:23.770Z | Help Fix Code | v1 | null | 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 update_pic(User *user, const char *filename) {
if (strlen(filename) > MAX_NAME) { // +1 bc of null term?
return 2;
}
return -1;
} | Change the filename for the profile pic of the given user. | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:17:02.608Z | Help Fix Code | v1 | null | 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 update_pic(User *user, const char *filename) {
if (strlen(filename) > MAX_NAME) { // +1 bc of null term?
return 2;
}
strcpy(&user.profile_pic, filename);
return -1;
} | Change the filename for the profile pic of the given user. | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:19:02.723Z | Help Fix Code | v1 | null | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int update_pic(User *user, const char *filename) {
if (strlen(filename) > MAX_NAME) {
return 2;
}
else if (fopen())
// checks passed, change filename
strcpy(user->profile_pic, filename);
return 0;
} | check for if the file does not exist or cannot be opened | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:40:01.954Z | Help Fix Code | v1 | null | User *find_user(const char *name, const User *head) {
User *user_ptr = head;
while (user_ptr->next != NULL || ((User *)user_ptr)->name != name) {
user_ptr = user_ptr->next;
}
if (user_ptr->name == name) { // case where user name exists
return user_ptr;
} else {
return NULL;
}
} | how to fix error returning 'const User *' (aka 'const struct user *') from a function with result type 'User *' (aka 'struct user *') discards qualifiers | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:44:16.108Z | Help Fix Code | v1 | null | 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;
void create_user(const char *name, User **user_ptr_add) {
} | 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. | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:46:01.507Z | Question from Code | v1 | how to initialize post and friends parameters of new user | 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;
void create_user(const char *name, User **user_ptr_add) {
} | null | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:50:20.312Z | Help Fix Code | v1 | null | void create_user(const char *name, User **user_ptr_add) {
// create with given name
struct user new_user;
strcpy(new_user.name, name);
strcpy(new_user.profile_pic, NULL);
} | fix compiler error for profile_pic: null argument where non-null required | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:52:56.685Z | Help Fix Code | v1 | null | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int create_user(const char *name, User **user_ptr_add) {
struct user new_user;
strcpy(new_user.name, name);
strcpy(new_user.profile_pic, ""); // check
new_user.friends = NULL;
new_user.next = NULL; | how to initialize .friends parameter when there are no friends | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:54:33.098Z | Help Fix Code | v1 | null | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int create_user(const char *name) {
struct user new_user;
strcpy(new_user.name, name);
strcpy(new_user.profile_pic, ""); // check
new_user.friends = NULL;
new_user.next = NULL; | initialize new_user.friends to be empty | null |
63c648a65f004bf4898cfe6e | 2023-02-12T05:58:32.583Z | Help Fix Code | v1 | null | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int create_user(const char *name) {
struct user new_user;
struct user new_user;
strcpy(new_user.name, name);
new_user->profile_pic = malloc(sizeof(char) * MAX_NAME);
// initialize post
new_user->friends = malloc(sizeof(struct user));
new_user.next = NULL; | fix "operator -> or ->* applied to "struct user" instead of to a pointer type" | null |
63c648a65f004bf4898cfe6e | 2023-02-12T06:00:06.371Z | Help Fix Code | v1 | null | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int create_user(const char *name) {
User new_user;
strcpy(new_user.name, name);
new_user->profile_pic = malloc(sizeof(char) * MAX_NAME);
// initialize post
new_user->friends = malloc(sizeof(struct user));
new_user.next = NULL; | fix "operator -> or ->* applied to "struct user" instead of to a pointer type"
| null |
63c648a65f004bf4898cfe6e | 2023-02-12T06:01:18.345Z | Help Fix Code | v1 | null | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int create_user(const char *name) {
User new_user;
strcpy(new_user.name, name);
new_user.profile_pic = malloc(sizeof(char) * MAX_NAME);
// initialize post
new_user.friends = malloc(sizeof(struct user));
new_user.next = NULL; | fix error expression must be a modifiable lvalue
| null |
63c648a65f004bf4898cfe6e | 2023-02-12T06:03:58.759Z | General Question | v1 | how to initialize empty array of chars with 10 characters | null | null | null |
63c648a65f004bf4898cfe6e | 2023-02-12T06:06:45.697Z | Help Fix Code | v1 | null | profilepic = char array[10]; | initialize array profilepic with 10 chars | null |
63c648a65f004bf4898cfe6e | 2023-02-12T06:09:02.662Z | General Question | v1 | is array[10] a string | null | null | null |
63c648a65f004bf4898cfe6e | 2023-02-12T22:11:13.466Z | General Question | v1 | how to add element to front of linked list | null | null | null |
63c648a65f004bf4898cfe6e | 2023-02-12T22:20:55.985Z | General Question | v1 | how to get first element of linked list | null | null | null |
63c648a65f004bf4898cfe6e | 2023-02-12T23:09:57.351Z | Help Fix Code | v1 | null | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
void create_user(const char *name, User **user_ptr_add) {
// create temp user struct with given name
User new_user;
strcpy(new_user.name, name);
strcpy(new_user.profile_pic, "");
new_user->friends = NULL;
new_user.next = NULL;
} | how to initialize friends member to be empty (NULL) | null |
63c648a65f004bf4898cfe6e | 2023-02-12T23:11:51.906Z | Help Fix Code | v1 | null | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
void create_user(const char *name, User **user_ptr_add) {
// create temp user struct with given name
User new_user;
strcpy(new_user.name, name);
strcpy(new_user.profile_pic, "");
new_user->friends = NULL;
new_user.next = NULL;
} | how to to set each element of the array of friends pointers to NULL without using memset | null |
63c648a65f004bf4898cfe6e | 2023-02-12T23:22:59.560Z | Help Fix Code | v1 | null | typedef struct post {
char author[MAX_NAME];
char *contents;
time_t *date;
struct post *next;
} Post; | how to initialize an empty post struct | null |
63c648a65f004bf4898cfe6e | 2023-02-12T23:34:15.646Z | Help Fix Code | v1 | null | int create_user(const char *name, User **user_ptr_add) {
// create temp user struct with given name
User new_user;
strcpy(new_user.name, name);
strcpy(new_user.profile_pic, "");
new_user.first_post = NULL;
// initialize friends list to be all NULL
for (int i = 0; i < MAX_FRIENDS; i++) {
new_user.friends[i] = NULL;
}
new_user.next = NULL;
if (strlen(name) > MAX_NAME) { // +1 for null term?
return 2;
}
// success case: list of pointers is empty
if (user_ptr_add == NULL) {
*user_ptr_add = &new_user;
return 0;
}
// check whether name exists in list of pointers
User *head = *user_ptr_add;
while (head->next != NULL) {
if (head->name == name) {
return 1;
}
head = head->next;
}
// checks passed; allocate memory for the new user, add, and return
// struct user *new_userr = malloc(sizeof(struct user));
new_user = malloc(sizeof(struct user));
head->next = &new_user;
return 0;
} | how to allocate heap memory for new_user | null |
63c648a65f004bf4898cfe6e | 2023-02-12T23:36:37.313Z | Help Fix Code | v1 | null | int create_user(const char *name, User **user_ptr_add) {
// create temp user struct with given name
User new_user;
strcpy(new_user.name, name);
strcpy(new_user.profile_pic, "");
new_user.first_post = NULL;
// initialize friends list to be all NULL
for (int i = 0; i < MAX_FRIENDS; i++) {
new_user.friends[i] = NULL;
}
new_user.next = NULL;
if (strlen(name) > MAX_NAME) { // +1 for null term?
return 2;
}
// success case: list of pointers is empty
if (user_ptr_add == NULL) {
*user_ptr_add = &new_user;
return 0;
}
// check whether name exists in list of pointers
User *head = *user_ptr_add;
while (head->next != NULL) {
if (head->name == name) {
return 1;
}
head = head->next;
}
// checks passed; allocate memory for the new user, add, and return
// struct user *new_userr = malloc(sizeof(struct user));
new_user = malloc(sizeof(struct user));
head->next = &new_user;
return 0;
} | how to use malloc on new_user | null |
63c648a65f004bf4898cfe6e | 2023-02-12T23:37:17.951Z | Help Fix Code | v1 | null | int create_user(const char *name, User **user_ptr_add) {
// create temp user struct with given name
User new_user;
strcpy(new_user.name, name);
strcpy(new_user.profile_pic, "");
new_user.first_post = NULL;
// initialize friends list to be all NULL
for (int i = 0; i < MAX_FRIENDS; i++) {
new_user.friends[i] = NULL;
}
new_user.next = NULL;
if (strlen(name) > MAX_NAME) { // +1 for null term?
return 2;
}
// success case: list of pointers is empty
if (user_ptr_add == NULL) {
*user_ptr_add = &new_user;
return 0;
}
// check whether name exists in list of pointers
User *head = *user_ptr_add;
while (head->next != NULL) {
if (head->name == name) {
return 1;
}
head = head->next;
}
// checks passed; allocate memory for the new user, add, and return
// struct user *new_userr = malloc(sizeof(struct user));
new_user = malloc(sizeof(struct user));
head->next = &new_user;
return 0;
} | how to use malloc to dynamically allocate space for new_user | null |
63c648a65f004bf4898cfe6e | 2023-02-13T00:39:23.950Z | Help Fix Code | v1 | null | 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) {
// create temp user struct with given name
User *new_user;
strcpy(&new_user.name, name);
strcpy(&new_user.profile_pic, "");
&new_user.first_post = NULL;
// initialize friends list to be all NULL
for (int i = 0; i < MAX_FRIENDS; i++) {
&new_user.friends[i] = NULL;
}
&new_user.next = NULL; | intialize new user with the given name | null |
63c648a65f004bf4898cfe6e | 2023-02-13T00:41:57.842Z | Help Fix Code | v1 | null | 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) {
// create temp user struct with given name
User *new_user;
strcpy(&new_user.name, name);
strcpy(&new_user.profile_pic, "");
&new_user.first_post = NULL;
// initialize friends list to be all NULL
for (int i = 0; i < MAX_FRIENDS; i++) {
&new_user.friends[i] = NULL;
}
&new_user.next = NULL; | how to deference new_user to just a struct user | null |
63c648a65f004bf4898cfe6e | 2023-02-13T03:35:19.307Z | Help Fix Code | v1 | null | 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 make_friends(const char *name1, const char *name2, User *head) {
// check if either user exists in list
if (find_user(name1, head) || find_user(name2, head) == NULL) {
return 4;
}
// check whether names entered are the same
else if (strcmp(name1, name2) == 0) {
return 3;
}
// since we know past this point that both users exist
User *user1 = (User *)find_user(name1, head);
// incompatible pointer type - friends is struct user *[10]
User *friends1 = user1->friends;
int count1 = 0;
while (friends1 != NULL) {
count1++;
friends1 = friends1->next;
}
User *user2 = (User *)find_user(name2, head);
User *friends2 = user2->friends;
int count2 = 0;
while (friends2 != NULL) {
count2++;
friends2 = friends2->next;
}
// check whether one already has 10 friends
if (count1 == 10 || count2 == 10) {
return 2;
}
// check whether already friends: only need to check one user because mutual relationship
else if (find_user(name2, friends1) != NULL) {
return 1;
}
// checks passed, add user to each others 'friends' members (both ways)
else {
// adding user2 as a friend of user1
while (friends1 != NULL) {
friends1 = friends1->next;
}
friends1->next = user2;
// adding user1 as a friend of user2
while (friends2 != NULL) {
friends2 = friends2->next;
}
friends2->next = user1;
return 0;
}
} | how to fix warning: incompatible pointer types initializing 'User *' (aka 'struct user *') with an expression of type 'struct user *[10 | null |
63c648a65f004bf4898cfe6e | 2023-02-13T17:57:58.358Z | Help Fix Code | v1 | null | // profile pic
FILE *pfp = fopen(user->profile_pic, "r");
//
if (pfp != NULL) {
fgets(, 100, pfp);
} | how to user fgets to print out pfp | null |
63c648a65f004bf4898cfe6e | 2023-02-13T19:20:04.318Z | Help Fix Code | v1 | null | // profile pic
FILE *pfp = fopen(user->profile_pic, "r");
//
if (pfp != NULL) {
fgets(, 100, pfp);
} | what is the buffer for fgets | null |
63c648a65f004bf4898cfe6e | 2023-02-13T19:20:30.636Z | Help Fix Code | v1 | null | // profile pic
FILE *pfp = fopen(user->profile_pic, "r");
//
if (pfp != NULL) {
fgets(, 100, pfp);
} | how to allocate buffer for fgets | null |
63c648a65f004bf4898cfe6e | 2023-02-13T19:35:21.096Z | Help Fix Code | v1 | null | // profile pic
FILE *pfp = fopen(user->profile_pic, "r");
//
if (pfp != NULL) {
fgets(, 100, pfp);
} | how to print the contents of the file row by row | null |
63c648a65f004bf4898cfe6e | 2023-02-13T19:40:05.789Z | General Question | v1 | loop through each row of a file | null | null | null |
63c648a65f004bf4898cfe6e | 2023-02-13T19:48:44.987Z | Help Fix Code | v1 | null | typedef struct user {
char name[MAX_NAME];
char profile_pic[MAX_NAME]; // This is a *filename*, not the file contents.
struct user *friends[MAX_FRIENDS];
struct user *next;
} User;
int print_user(const User *user) {
if (user == NULL) {
return 1;
}
FILE *pfp = fopen(user->profile_pic, "r");
char row[100];
while () {
fgets(row[i], 100, pfp);
}
fclose(pfp); | loop through and print each row of the file pfp | null |
63c648a65f004bf4898cfe6e | 2023-02-14T15:57:42.097Z | Help Fix Code | v1 | null | typedef struct post {
char author[MAX_NAME];
char *contents;
time_t *date;
struct post *next;
} Post;
void make_post(const User *author, User *target, char *contents) {
// either one or author or target names does not exist
if (author == NULL || target == NULL) {
return 2;
}
/*
So the flow goes like this (in make_post):
1) check if user is null
2) have a for loop that iterates until MAX_FRIENDS
3) inside the for loop, make a check to see if the author and target are friends
4) IF they are friends, initialize the time_t curr_time and allocate space for
the ENTIRE new post with MALLOC
5) then assign the values for all the members of this struct
(do the contents, time, next and author) and then make sure this post is the
FIRST POST (linked list stuff you know)
*/
// loop through one user's friends
int friends = 0;
for (int i = 0; i < MAX_FRIENDS; i++) {
if (author->friends[i] == target) {
friends = 1;
}
}
// users not friends, early return
if (friends == 0) {
return 1;
}
// checks passed, initialize a new post
Post *new_post = malloc(sizeof(struct post));
// malloc error check
if (new_post == NULL) {
exit(1);
}
strcpy(new_post->author, author->name);
strcpy(new_post->contents, contents);
time_t *curr_time;
new_post->date = curr_time; // &curr_time?
new_post->next = NULL;
// 'send' post to target; pointer at head, takes care of both whether empty or not cases
new_post->next = target->first_post;
return 0;
} | how to fix warning: variable 'curr_time' is uninitialized when used here [-Wuninitialized]
new_post->date = curr_time; | null |
63c648a65f004bf4898cfe6e | 2023-02-14T15:58:41.431Z | Help Fix Code | v1 | null | typedef struct post {
char author[MAX_NAME];
char *contents;
time_t *date;
struct post *next;
} Post;
void make_post(const User *author, User *target, char *contents) {
// either one or author or target names does not exist
if (author == NULL || target == NULL) {
return 2;
}
/*
So the flow goes like this (in make_post):
1) check if user is null
2) have a for loop that iterates until MAX_FRIENDS
3) inside the for loop, make a check to see if the author and target are friends
4) IF they are friends, initialize the time_t curr_time and allocate space for
the ENTIRE new post with MALLOC
5) then assign the values for all the members of this struct
(do the contents, time, next and author) and then make sure this post is the
FIRST POST (linked list stuff you know)
*/
// loop through one user's friends
int friends = 0;
for (int i = 0; i < MAX_FRIENDS; i++) {
if (author->friends[i] == target) {
friends = 1;
}
}
// users not friends, early return
if (friends == 0) {
return 1;
}
// checks passed, initialize a new post
Post *new_post = malloc(sizeof(struct post));
// malloc error check
if (new_post == NULL) {
exit(1);
}
strcpy(new_post->author, author->name);
strcpy(new_post->contents, contents);
time_t *curr_time;
new_post->date = curr_time; // &curr_time?
new_post->next = NULL;
// 'send' post to target; pointer at head, takes care of both whether empty or not cases
new_post->next = target->first_post;
return 0;
} | how to fix warning: incompatible integer to pointer conversion initializing 'time_t *' (aka 'long *') with an expression of type 'time_t' (aka 'long') [-Wint-conversion]
time_t *curr_time = time(NULL); | null |
63c648a65f004bf4898cfe6e | 2023-02-14T16:07:22.595Z | Help Fix Code | v1 | null | 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;
/*
* 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) {
if (find_user(name, user_ptr_del) == NULL) { // don't think this is right help
return 1;
} | how to fix warning: incompatible pointer types passing 'User **' (aka 'struct user **') to parameter of type 'const User *' (aka 'const struct user *'); dereference with * [-Wincompatible-pointer-types]
if (find_user(name, user_ptr_del) == NULL) { | null |
63c648a65f004bf4898cfe6e | 2023-02-14T21:32:11.371Z | General Question | v1 | how to delete first element of linked list using prev and curr | null | null | null |
63c648a65f004bf4898cfe6e | 2023-02-14T21:44:13.643Z | Help Fix Code | v1 | null | /*
* 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) {
if (find_user(name, *user_ptr_del) == NULL) { // don't think this is right help
return 1;
}
// user_ptr_del is a pointer to a user pointer
// at the point, user exists
User *prev = *user_ptr_del;
User *curr = prev->next;
// special case, when there is only one element
if (curr = NULL) {
free(prev->first_post); // need to loop
prev = NULL;
free(prev);
}
while (curr != NULL) {
// deleting head of list
if (prev->name == name) {
prev->next = NULL;
free(prev->first_post); // need to loop
free(prev);
}
if (curr->name != name) {
prev->next = curr;
curr = curr->next;
} | delete user with given name using prev and curr | null |
63c648a65f004bf4898cfe6e | 2023-02-15T07:28:04.400Z | Help Fix Code | v1 | null | 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;
/*
* Print a user profile.
* For an example of the required output format, see the example output
* linked from the handout.
* Return:
* - 0 on success.
* - 1 if the user is NULL.
*/
int print_user(const User *user) {
if (user == NULL) {
printf("user dne\n");
return 1;
}
// 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"); | how to print out all non-NULL elements of friends[MAX_FRIENDS] | null |
63c648a65f004bf4898cfe6e | 2023-02-15T15:01:39.852Z | Help Fix Code | v1 | null | 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) {
// either one or author or target names does not exist
if (author == NULL || target == NULL) {
return 2;
}
// loop through one user's friends
int friends = 0;
for (int i = 0; i < MAX_FRIENDS; i++) {
if (author->friends[i] == target) {
friends = 1;
}
}
// users not friends, early return
if (friends == 0) {
return 1;
}
// checks passed, initialize a new post
Post *new_post = malloc(sizeof(struct post));
// malloc error check
if (new_post == NULL) {
exit(1);
}
strcpy(new_post->author, author->name);
strcpy(new_post->contents, contents);
time_t *curr_time = malloc(sizeof(time_t));
new_post->date = curr_time;
new_post->next = NULL;
// 'send' post to target; pointer at head, takes care of both whether empty or not cases
new_post->next = target->first_post;
return 0;
} | how to get rid of segmentation faults at line 33: strcpy(new_post->contents, contents);
| null |
63c648a65f004bf4898cfe6e | 2023-02-15T16:06:10.089Z | Help Fix Code | v1 | null | 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) {
// either one or author or target names does not exist
if (author == NULL || target == NULL) {
return 2;
}
// loop through one user's friends
int friends = 0;
for (int i = 0; i < MAX_FRIENDS; i++) {
if (author->friends[i] == target) {
friends = 1;
}
}
// users not friends, early return
if (friends == 0) {
return 1;
}
// checks passed, initialize a new post
Post *new_post = malloc(sizeof(struct post));
// malloc error check
if (new_post == NULL) {
exit(1);
}
strcpy(new_post->author, author->name);
strcpy(new_post->contents, contents);
time_t *curr_time = malloc(sizeof(time_t));
new_post->date = curr_time;
new_post->next = NULL;
// 'send' post to target; pointer at head, takes care of both whether empty or not cases
new_post->next = target->first_post;
return 0;
} | how to get rid of error: "invalid write of size 1" in line 33 | null |
63c648a65f004bf4898cfe6e | 2023-02-15T17:48:24.259Z | Help Fix Code | v1 | null | 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 delete_user(const char *name, User **user_ptr_del) {
if (find_user(name, *user_ptr_del) == NULL) {
return 1;
}
// at the point, confirmed that the user exists
User *user_del = find_user(name, *user_ptr_del);
// Post *user_posts = user_del->first_post;
// only loop if there are posts
if (user_del->first_post != NULL) {
// user_del has posts, can loop and free now
Post *user_posts = user_del->first_post;
while (user_posts->next != NULL) {
// need to store copy of rest of list
// or else unable to access after freeing
Post *temp = user_posts->next;
free(user_posts->date);
free(user_posts->contents);
free(user_posts);
user_del->first_post = temp; // off!!
} | how to fix segmentation error | null |
63c648a65f004bf4898cfe6e | 2023-02-22T23:01:31.060Z | Help Fix Code | v1 | null | int element; /*assigned a hidden value */
/* In the following line, write what <cond> should be in: "switch(<cond>){" */
switch (element) {
/* The body of the switch statement goes here. The first case is written for you below. */
case 1 :
printf("earth");
break;
/* Write case 2 (water) here. */
case 2 :
printf("water");
break;
/* Write case 3 (air) here. */
case 3 :
printf("air");
break;
/* Write case 4 (fire) here. */
case 4 :
printf("fire");
break;
/* Write the default case here. */
default :
printf("not a valid elements");
return 0;
} | An integer variable, element is initialized as a hidden value. Write a switch statement with cases 1-4 that prints one of the four classical elements based on the hidden integer value.
Write the cases in the following order (beginning with case 1): earth, water, air, and fire.
The default case should print "not a valid element". | null |
63c648a65f004bf4898cfe6e | 2023-02-22T23:02:02.487Z | Help Fix Code | v1 | null | int element; /*assigned a hidden value */
/* In the following line, write what <cond> should be in: "switch(<cond>){" */
switch (element) {
/* The body of the switch statement goes here. The first case is written for you below. */
case 1 :
printf("earth");
break;
/* Write case 2 (water) here. */
case 2 :
printf("water");
break;
/* Write case 3 (air) here. */
case 3 :
printf("air");
break;
/* Write case 4 (fire) here. */
case 4 :
printf("fire");
break;
/* Write the default case here. */
default :
printf("not a valid elements");
} | An integer variable, element is initialized as a hidden value. Write a switch statement with cases 1-4 that prints one of the four classical elements based on the hidden integer value.
Write the cases in the following order (beginning with case 1): earth, water, air, and fire.
The default case should print "not a valid element". | null |
63c648a65f004bf4898cfe6e | 2023-02-22T23:02:58.596Z | Help Fix Code | v1 | null | int element; /*assigned a hidden value */
/* In the following line, write what <cond> should be in: "switch(<cond>){" */
switch (element) {
/* The body of the switch statement goes here. The first case is written for you below. */
case 1 :
printf("earth");
break;
/* Write case 2 (water) here. */
case 2 :
printf("water");
break;
/* Write case 3 (air) here. */
case 3 :
printf("air");
break;
/* Write case 4 (fire) here. */
case 4 :
printf("fire");
break;
/* Write the default case here. */
default :
printf("not a valid elements");
} | fix error: Compilation error: In function 'main':
3:1: error: expected expression before 'switch'
10 | switch (element) {
| ^~~~~~ | null |
63c648a65f004bf4898cfe6e | 2023-02-22T23:09:37.508Z | Help Fix Code | v1 | null | int element; /*assigned a hidden value */
/* In the following line, write what <cond> should be in: "switch(<cond>){" */
switch (element) {
| An integer variable, element is initialized as a hidden value. Write a switch statement with cases 1-4 that prints one of the four classical elements based on the hidden integer value.
Write the cases in the following order (beginning with case 1): earth, water, air, and fire.
The default case should print "not a valid element". | null |
63c648a65f004bf4898cfe6e | 2023-02-22T23:14:05.526Z | Help Fix Code | v1 | null | int element; /*assigned a hidden value */
/* In the following line, write what <cond> should be in: "switch(<cond>){" */
switch (element) {
| fix error: 3:8: error: expected ')' before 'switch'
10 | element switch(element) {
| ^~~~~~~
| )
9:11: note: to match this '('
9 | switch(
| ^
Please check the exercise description. There's an issue in your code:
expected expression before '}' token
| null |
63c648a65f004bf4898cfe6e | 2023-02-22T23:16:08.783Z | Help Fix Code | v1 | null | int element; /*assigned a hidden value */
/* In the following line, write what <cond> should be in: "switch(<cond>){" */
switch (element) {
| Compilation error: In function 'main':
3:1: error: expected expression before 'switch'
10 | switch (element) {
| ^~~~~~
Please check the exercise description. There's an issue in your code:
expected expression before '}' token1:5: warning: variable 'element' set but not used [-Wunused-but-set-variable]
6 | int element; /*assigned a hidden value */
| ^~~~~~~ | null |
63c648a65f004bf4898cfe6e | 2023-02-22T23:17:35.287Z | Help Fix Code | v1 | null | int element; /*assigned a hidden value */
/* In the following line, write what <cond> should be in: "switch(<cond>){" */
switch (element) {
| how to initialize element in switch statement | null |
63c648a65f004bf4898cfe6e | 2023-02-22T23:18:06.994Z | Help Fix Code | v1 | null | int element; /*assigned a hidden value */
/* In the following line, write what <cond> should be in: "switch(<cond>){" */
switch (element) {
| what does /* In the following line, write what <cond> should be in: "switch(<cond>){" */
mean | null |
63c648a65f004bf4898cfe6e | 2023-02-22T23:28:59.011Z | Help Fix Code | v1 | null | int var_a, var_b, var_c;
if (var_a == var_b && var_a == var_c && var_b == var_c) {
printf("none unique");
}
else if (var_a != var_b && var_a != var_b && var_b != var_c) {
printf("all unique");
}
else {
printf("some unique");
} | why does is this not completely correct | null |
63c648a65f004bf4898cfe6e | 2023-02-23T00:13:48.163Z | Help Fix Code | v1 | null | int main() {
int start = 3;
int repeat = 4;
for (int i = 0; i <= repeat; i++) {
for (int j = start; j>=1; j--) {
printf("%d ", j, "blastoff");
}
printf("\n");
}
} | Below you have a program fragment where the integer variables start and repeat have been assigned values in code that is hidden.
Your task is to write a nested loop to print lines of integers counting backwards from start to 1 and then print Blastoff. You should do this repeat times.
For example, if start is 3 and repeat is 4, your loop should print
3 2 1 Blastoff
3 2 1 Blastoff
3 2 1 Blastoff
3 2 1 Blastoff | null |
63c648a65f004bf4898cfe6e | 2023-02-23T00:26:02.907Z | Help Fix Code | v1 | null | #include <stdio.h>
int main() {
int start = 5; // you don't have to use all these variables but you may want them
int stop = 10;
int i;
do {
printf("%d", i);
i ++;
}
int i = start;
while (i < stop);
return 0;
} | Complete the program below so that it prints the squares of the integers from 5 to 9 inclusive. Use a do while loop.
| null |
63c648a65f004bf4898cfe6e | 2023-02-23T00:26:35.310Z | Help Fix Code | v1 | null | #include <stdio.h>
int main() {
int start = 5; // you don't have to use all these variables but you may want them
int stop = 10;
int i;
do {
printf("%d", i);
i ++;
} while (i < stop);
return 0;
} | Complete the program below so that it prints the squares of the integers from 5 to 9 inclusive. Use a do while loop.
| null |
63c648a65f004bf4898cfe6e | 2023-02-23T00:27:49.616Z | Help Fix Code | v1 | null | #include <stdio.h>
int main() {
int start = 5; // you don't have to use all these variables but you may want them
int stop = 10;
int i;
do {
i = start;
printf("%d", i * i);
i ++;
} while (i < stop);
return 0;
} | Complete the program below so that it prints the squares of the integers from 5 to 9 inclusive. Use a do while loop.
| null |
63c648a65f004bf4898cfe6e | 2023-02-23T00:28:25.244Z | Help Fix Code | v1 | null | #include <stdio.h>
int main() {
int start = 5; // you don't have to use all these variables but you may want them
int stop = 10;
int i;
do {
i = start;
printf("%d", i * i);
i ++;
} while (i < stop);
return 0;
} | fix runtime error | null |
63c648a65f004bf4898cfe6e | 2023-02-28T04:54:58.064Z | Question from Code | v1 | what does the if (saw_null) condition mean | int terminate_string(char *c, int index) {
int saw_null = 0;
for (int i = 0; i < index; i++) {
if (saw_null) {
c[i] = '\0';
}
}
} | null | null |
63c648a65f004bf4898cfe6e | 2023-02-28T04:55:52.108Z | Question from Code | v1 | what does if condition mean | int terminate_string(char *c, int index) {
int saw_null = 0;
for (int i = 0; i < index; i++) {
if (0) {
c[i] = '\0';
}
}
} | null | null |
63c648a65f004bf4898cfe6e | 2023-02-28T04:56:50.975Z | Explain Code | v1 | null | int terminate_string(char *c, int index) {
int saw_null = 0;
for (int i = 0; i < index; i++) {
if (saw_null) {
c[i] = '\0';
}
else {
if (c[i] == '\0') {
saw_null = i;
}
}
}
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T01:16:03.158Z | Question from Code | v2 | What does the program print to stderr when it runs without interruption?
| 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;
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T01:17:50.174Z | 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 A? | 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;
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T01:25:29.404Z | 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;
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T07:24:02.766Z | General Question | v2 | how to use strtok to parse through a makefile | null | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T07:26:52.792Z | Question from Code | v2 | how to iterate through each line of a makefile | #This is a test makefile for A3.It uses the files from the early version
#of the demo that we did in week 6.
main : linked_list.o main.o gcc - Wall - g - std = gnu99 -
o main linked_list.o main
.o
main.o
: main.c linked_list.h gcc - Wall - g - std = gnu99 -
c main
.c
linked_list.o
: linked_list.c linked_list.h gcc - Wall - g - std = gnu99 -
c linked_list.c
#notice that this target has no dependencies
clean
: rm - f main rm - f linked_list.o rm - f main.o | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T07:31:25.544Z | Question from Code | v2 | how to traverse to line 5 in this makefile | #This is a test makefile for A3.It uses the files from the early version
#of the demo that we did in week 6.
main : linked_list.o main.o gcc - Wall - g - std = gnu99 -
o main linked_list.o main
.o
main.o
: main.c linked_list.h gcc - Wall - g - std = gnu99 -
c main
.c
linked_list.o
: linked_list.c linked_list.h gcc - Wall - g - std = gnu99 -
c linked_list.c
#notice that this target has no dependencies
clean
: rm - f main rm - f linked_list.o rm - f main.o | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T18:56:42.335Z | Help Fix Code | v2 | how to not print the colon : | #include <stdio.h>
#include <string.h>
int main () {
char str[256] = "main : linked_list.o main.o ";
const char s[2] = " ";
char *token;
/* get the first token */
token = strtok(str, s);
/* walk through other tokens */
while( token != NULL ) {
printf( " %s\n", token );
token = strtok(NULL, s);
}
return(0);
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T18:59:07.357Z | Help Fix Code | v2 | : is still printing | #include <stdio.h>
#include <string.h>
int main () {
char str[256] = "main : linked_list.o main.o ";
const char s[2] = " ";
char *token;
/* get the first token */
token = strtok(str, s);
/* walk through other tokens */
while( token != NULL ) {
if (token != ":") {
printf( " %s\n", token );
}
token = strtok(NULL, s);
}
return(0);
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T19:04:23.010Z | Help Fix Code | v2 | line 17 to only print the space-separated strings after the colon : | #include <stdio.h>
#include <string.h>
int main () {
char str[256] = "main : linked_list.o main.o ";
const char s[2] = " ";
char *token;
/* get the first token */
token = strtok(str, s);
char *target = token;
printf("the target is %s", target);
/* walk through other tokens */
while( token != NULL ) {
if (strcmp(token, ":") != 0) {
printf( "Its dependencies are %s\n", token );
}
token = strtok(NULL, s);
}
return(0);
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T19:06:29.637Z | Help Fix Code | v2 | how to skip the token if it is a colon : and get the next token | #include <stdio.h>
#include <string.h>
int main () {
char str[256] = "main : linked_list.o main.o ";
const char s[2] = " ";
char *token;
/* get the first token */
token = strtok(str, s);
char *target = token;
printf("the target is %s", target);
/* walk through other tokens */
while( token != NULL ) {
if (strcmp(token, ":") != 0) {
printf( "Its dependencies are %s\n", token );
}
token = strtok(NULL, s);
}
return(0);
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T19:11:12.813Z | Help Fix Code | v2 | i want output to be:
the target is main
Its dependencies are linked_list.o
Its dependencies are linked_list.o | #include <stdio.h>
#include <string.h>
int main () {
char str[256] = "main : linked_list.o main.o ";
const char s[2] = " ";
char *token;
/* get the first token */
token = strtok(str, s);
char *target = token;
printf("the target is %s\n", target);
/* walk through other tokens */
while( token != NULL ) {
if (strcmp(token, ":") == 0) {
token = strtok(NULL, s);
}
if (strcmp(token, ":") != 0) {
printf( "Its dependencies are %s\n", token );
token = strtok(NULL, s);
}
}
return(0);
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T19:14:22.802Z | Help Fix Code | v2 | i want output to be: the target is main Its dependencies are linked_list.o Its dependencies are linked_list.o
| #include <stdio.h>
#include <string.h>
int main () {
char str[256] = "main : linked_list.o main.o ";
const char s[2] = " ";
char *token;
/* get the first token */
token = strtok(str, s);
char *target = token;
printf("the target is %s\n", target);
/* walk through other tokens */
while( token != NULL ) {
if (strcmp(token, ":") == 0) {
token = strtok(NULL, s);
}
if (strcmp(token, ":") != 0) {
printf( "Its dependencies are %s\n", token );
token = strtok(NULL, s);
}
}
return 0;
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T19:42:36.490Z | Help Fix Code | v2 | save all token pointers into an array of dependency struct pointers | while (fgets(line, fp) != 0) {
char *target = strtok(line, delim);
token = strtok(NULL, delim); // start at token after target
int num_dependencies; // keep track of # deps -> initialize list of dep pointers
// initializer list of dep pointers
while (token != NULL) {
if (strcmp(token, ":") == 0) { // skip over the colon ':'
token = strtok(NULL, delim);
}
// the remaining tokens are all dependencies
// all dependencies are also rules, so initialize each as a rule_node struct
Rule *new_rule_dep;
strncpy(new_rule_dep->target, token, MAXLINE);
// initialize dependency as new_dep
Dependency *new_dep;
new_dep->rule = new_rule_dep;
token = strtok(NULL, delim);
num_dependencies++;
}
file_line_number++; // move on to next line in the file
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T20:49:19.511Z | Question from Code | v2 | how to skip lines with comments and white space of a makefile to get to line 5 |
main : linked_list.o main.o gcc - Wall - g - std = gnu99 -
o main linked_list.o main
.o
main.o
: main.c linked_list.h gcc - Wall - g - std = gnu99 -
c main
.c
linked_list.o
: linked_list.c linked_list.h gcc - Wall - g - std = gnu99 -
c linked_list.c
#notice that this target has no dependencies
clean
: rm - f main rm - f linked_list.o rm - f main.o | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T21:23:35.908Z | Help Fix Code | v2 | line 14: error: array initializer must be an initializer list or string literal
| /* 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) {
// setting up to read through the makefile
char line[MAXLINE];
const char delim[2] = ' '; // delimiter for strtok
char *token;
int file_line_number = 0;
Rule first_rule; // this is the one that is being returned
while (fgets(line, MAXLINE, fp) != 0) { // until the end of the file
// another while loop to check if the first character of the line is alphanumeric
// if so, that is a new rule,
// initialize a new rule
Rule *new_rule;
char *target = strtok(line, delim);
strncpy(new_rule->target, target, MAXLINE);
new_rule->dependencies = NULL;
new_rule->actions = NULL;
new_rule->next_rule = NULL; | null | null |
63c648a65f004bf4898cfe6e | 2023-03-13T22:48:23.190Z | Help Fix Code | v2 | where is the missing semicolon | // go through all dependencies
while (token != NULL) {
if (strchr(token, ':') != NULL) {
continue;
}
else {
Rule *rule_dep;
Dependency *new_dep;
// initialize
}
token = strtok(NULL, delimiter); // go to next token
} | null | null |
63c648a65f004bf4898cfe6e | 2023-03-14T04:18:45.730Z | Help Fix Code | v2 | getting warning: implicit declaration of function ‘find_rule’ | Rule *parse_file(FILE *fp) {
// initializing
char line[MAXLINE];
Rule *first_rule;
first_rule = malloc(sizeof(Rule));
if (first_rule == NULL) {
perror("malloc");
exit(1);
}
// iterating through the entire makefile
while (fgets(line, MAXLINE, fp) != NULL) {
if (is_comment_or_empty(line) == 1) { // line starts with '#' or ' '
continue;
}
// it starts getting serious here
else {
// initializing global variables that are used in both branches
Rule *curr_rule;
curr_rule = malloc(sizeof(Rule));
if (curr_rule == NULL) {
perror("malloc");
exit(1);
}
const char delimiter = ' ';
// tokenize target
char *target;
target = strtok(line, &delimiter);
// want to initialize target and dependencies before actions
if (line[0] != '\t') {
// rule struct has not been added to first_rule
if (find_rule(first_rule, target) == NULL) {
// curr_rule = malloc(sizeof(Rule));
// if (curr_rule == NULL) {
// perror("malloc");
// exit(1);
// }
strncpy(curr_rule->target, target, MAXLINE);
insert_rule(first_rule, curr_rule);
}
Rule *find_rule(Rule *first_rule, char *target) {
while (first_rule->next_rule != NULL) {
if (strcmp(first_rule->target, target) == 0) {
return first_rule;
}
}
return NULL; | null | null |
63c648a65f004bf4898cfe6e | 2023-03-14T18:19:13.735Z | Help Fix Code | v2 | why is this giving me an error. i want to be iterating through the list of rules with first_rule as the head, ad returning whether the struct associated with the target is found | typedef struct rule_node {
char *target;
Dependency *dependencies;
Action *actions;
struct rule_node *next_rule;
} Rule;
Rule *find_rule(Rule *first_rule, char *target) {
while (first_rule->next_rule != NULL) { // TODO: conditional jump / var here ?
if (strcmp(first_rule->target, target) == 0) {
return first_rule;
}
first_rule = first_rule->next_rule;
}
return NULL; | null | null |
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