Cross [Rekurencja]

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

#define N 11
#define M 11

void cross(int **tab, int start_w, int start_k, int stop_w, int stop_k);

int main ( void )
{
    int** t = (int**)calloc(N,sizeof(int*));

    for(int i = 0; i < N; i++)
    {
        t[i] = (int*)calloc(M,sizeof(int));
    }
    cross(t,0,0,N-1,M-1);

    for(int i = 0; i < N; i++)
    {
        printf("\n");
        for(int j = 0; j < M; j++)
        {
            printf("%c  ",t[i][j]);
        }
    }

    return 0;
}
void cross(int **tab, int start_w, int start_k, int stop_w, int stop_k)
{
    if((stop_w - start_w <= 1) || (stop_k - start_k <= 1))
    {
        return;
    }

    int half_k = (start_w + stop_w) / 2;
    int half_w = (start_k + stop_k) / 2;

    for(int i = start_w; i <= stop_w; i++)
    {
        tab[i][half_w] = '*';
    }
    for(int i = start_k; i <= stop_k; i++)
    {
        tab[half_k][i] = '*';
    }
    cross(tab, start_w, start_k, half_k-1, half_w-1);
    cross(tab, half_k+1, half_w+1, stop_w, stop_k);
    cross(tab, start_w, half_w+1, half_k-1, stop_k);
    cross(tab, half_k+1,start_k,stop_w,half_w-1);
}