#include <stdio.h>

void main(void)
{
    int array[4][4] =
    {
        {0,0,0,0},
        {0,0,0,0},
        {0,0,0,0},
        {0,0,0,0}
    };
    int x, y;
    array[0][0] = 1;
    array[1][1] = 3;
    array[2][2] = 3;
    array[3][3] = 7;

    // Ausgeben des Arrays
    for(x = 0; x < 4; x++)
    {
        for(y = 0; y < 4; y++)
        {
            printf("%d ",array[x][y]);
        }
        printf("\n");
    }
}