2D « struct « C Array Q&A

1. Coding problem using a 2-d array of structs inside another struct in C    stackoverflow.com

I am working with a 2-dimensional array of structs which is a part of another struct. It's not something I've done a lot with so I'm having a problem. This function ...

2. Pushing a 1-D array onto a 2-D array in C    stackoverflow.com

I am working on a queue data structure. The structure is:

struct queue
{
 char array[MAX_LENGTH][8];
 int back;
};

3. Assign to 2D array a 2D array in a struct    stackoverflow.com

I have a function which tries to loop through a 2D array in a struct:

typedef struct node
{
    int grid[3][3];
} Node;


void someFunction(Node *node) {
     ...

4. A 2D array wrapped in a structure    bytes.com

The problem is that although you allocate the data for the int** pointer in struct sam r; in func the structure itself is on the stack and only has the lifetime of the function call. You return a pointer to r but by the time the receiving code gets that pointer the struct sam r no longer exists, it was deleted ...

5. 2D arrays of structs    bytes.com

6. 2D array of structures    bytes.com

Hello, I wonder how to resize such array of structures using realloc()? #include #include #define FIRST 7 typedef struct { char *name; int i; int j; } STRUCTURE; STRUCTURE **p_structure; int main() { p_structure = (STRUCTURE **) malloc(FIRST * sizeof(STRUCTURE)); if ( p_structure == NULL ) { printf("Failed to allocate memory, exiting..."); return 1; } } Thank you in ...

7. confusion regarding 2D array of struct pointers    cboard.cprogramming.com

8. Help with 2-D arrays and structs    cboard.cprogramming.com

I am working with a 2-dimensional array of structs which is a part of another struct. It's not something I've done a lot with so I'm having a problem. This function ends up failing after getting to the "test" for-loop near the end. It prints out one line correctly before it seg faults. The parts of my code which read data ...

9. Help with 2d array of structures and pointers.    cboard.cprogramming.com

10. Having problems initialising a 2d array which is part of a struct    cboard.cprogramming.com

11. Can you have a 2D array of structures?    cboard.cprogramming.com

#include struct blah { int a, b, c; }; int main ( void ) { struct blah feh[2][2] = { { {1,2,3}, {4,5,6}, }, { {10,11,12}, {13,14,15}, } }; int i, j; for ( i = 0; i < 2; i++ ) { for ( j = 0; j < 2; j++ ) printf ( "(%d,%d,%d)", feh[i][j].a, feh[i][j].b, feh[i][j].c ); ...

12. more help...2d arrays in structures - sscanf    cboard.cprogramming.com

I'm reading in this file: Code: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 3 3 3 0 0 7 7 7 7 0 0 11 11 11 11 0 0 15 15 15 15 0 0 3 0 0 0 0 0 ...

13. 2d array of structures    cboard.cprogramming.com

Hi there. I have a 2d array of structures and i am having trouble getting at them. I'm still relatviley new and pointers are *not* my fort. I've sent the whole code below, cause i really dont know what's going on. Its supposed to be a mars rover simulation, now I'm really nowhere near completion, but I'm working on the "move" ...

14. Passing 2D array of structs    forums.devshed.com

You may find this useful. Rather than creating the arrays on the stack (which, as you increase the size will eventually overflow), this creates it on the heap. You could allocate a 2d array instead of 'emulating' it (this is how the actual memory is managed at the machine level anyway), but I find this is easier for me. I make ...

15. pointer in structure to a 2D array    daniweb.com

16. using malloc for a 2D array which is inside a structure    daniweb.com

Dear all, I have to use a funny structure in my code which has a 2D array and allocate it in the program. I do not know how to use malloc for that. This is the code: #include #include #include #include #define NUMBER_DECISION_VARIABLES (int)4 #define DIM (int)50 struct Results{ double *DV[NUMBER_DECISION_VARIABLES]; }; int main(){ int i, j; ...

17. Passing 2d array of struct    daniweb.com

#include #include #include typedef struct cacheStruct { int word; int data; int dirty; int lr; } cacheItem; void printCache(cacheItem cache[256][256], int blockSize, int numSets, int blocksPer) { int i, j; printf("passed to function: \n"); for(i = 0; i < blockSize*numSets; i++){ for(j = 0; j < blocksPer; j++){ printf("%d\n", cache[i][j].lr); } } } int main(int argc, char *argv[]) ...