Question

How to declare and use a pointer for a function returning a 2D array in C

Answer 1

#include <stdio.h>

typedef int(*ptr)[2];

int arr[2][2] = { {1, 2}, {3, 4} };

ptr f(void) {
    return arr;
}

int main()
{
    ptr p = f();  // call function f

    printf("%d %d\n", p[0][0], p[0][1]);
    printf("%d %d\n", p[1][0], p[1][1]);

    return 0;
}




/*
run:

1 2
3 4

*/

 

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