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

If you still want malloc2d to return a status code, the parameter needs to be of type int***:

int malloc2d(int *** grid, int nrows, int ncols){

And you need to use *grid to refer to the supplied buffer:

    int i;
    *grid = malloc( sizeof(int *) * nrows);

    if (*grid == NULL){
        printf("ERROR: out of memory\n");
        return 1;
    }

    for (i=0;i

Then, when calling malloc2d, pass it the address of an int** to fill in:

int ** grid;

malloc2d(&grid, 10, 10);