Passing multidimensional array created on stack as function argument without dimention specifying

stack_array_as_argument.c

// "we can not declare that function as accepting a pointer-to-pointer" (c) https://www.eskimo.com/~scs/cclass/int/sx9a.html
// Instead we can do this ugly thing

#include <stdio.h>
#include <stdlib.h>

void printStackArray(const int* const arr, const size_t n, const size_t m)
{
    size_t i, j;
    for (i = 0; i < n; i++)
    {
        for (j = 0; j < m; j++)
        {
            printf("%02d ", arr[i * m + j]);
        }
        printf("\n");
    }
}

void printHeapArray(const int* const* const arr, const size_t n, const size_t m)
{
    size_t i, j;
    for (i = 0; i < n; i++)
    {
        for (j = 0; j < m; j++)
        {
            printf("%02d ", arr[i][j]);
        }
        printf("\n");
    }
}

void testStackArray(const size_t n, const size_t m)
{
    int c = 1;
    int a[n][m];

    size_t i, j;
    for (i = 0; i < n; i++)
    {
        for (j = 0; j < m; j++)
        {
            a[i][j] = c;
            c++;
        }
    }

    printStackArray((const int* const)a, n, m);
}

void testHeapArray(const size_t n, const size_t m)
{
    int c = 1;
    int** aa = (int**)malloc(sizeof(int*) * n);

    size_t i, j;
    for (i = 0; i < n; i++)
    {
        aa[i] = (int*)malloc(sizeof(int) * m);
        for (j = 0; j < m; j++)
        {
            aa[i][j] = c;
            c++;
        }
    }

    printHeapArray((const int* const* const)aa, n, m);

    for (i = 0; i < n; i++)
    {
        free(aa[i]);
    }
    free(aa);
}

int main()
{
    const size_t n = 2;
    const size_t m = 3;

    testStackArray(n, m);
    printf("\n");
    testHeapArray(n, m);
    return 0;
}