malloc-ating multidimensional array in function

Question

I\'m trying to allocate a 2d array in a C program. It works fine in the main function like this (as explained here):

#include 
#include 

        

Answer 1

Shorter should be below, with free (!) and initialized values for each grid element:

#include 
#include 

#define NROWS 10
#define NCOLS 10

int main()
{
    int (* grid)[NCOLS] = calloc(NROWS,sizeof*grid);

    /* no more needed here malloc2d(grid, 10, 10); */
    grid[5][6] = 15;
    printf("%d\n", grid[5][6]);
    free(grid); /* every c/malloc need a free */
    return 0;
}