/* 2D Array Demo */


#include <stdio.h>

#define BOX 10
#define WHITE '.'
#define BLACK '_'

#define HOLE ' '

int main() {

unsigned char grid[BOX][BOX];
int i,j;                      /* loop counters */

/* create */

for (i=0;i < BOX;i++) {
   for (j = 0; j < BOX; j++) {
     grid[i][j] = '#';
   }
}


/* display  */

for (i=0;i < BOX;i++) {
   for (j = 0; j < BOX; j++) {
 
      printf("%c", grid[i][j]);
   }
   printf("\n");
}


printf("\n\n\n");

 grid[4][7] = HOLE;
 grid[2][3] = HOLE;

for (i=0;i < BOX;i++) {
   for (j = 0; j < BOX; j++) {
 
      printf("%c", grid[i][j]);
   }
   printf("\n");
}
printf("\n\n\n");


  grid[2][5] = grid[4][7];

for (i=0;i < BOX;i++) {
   for (j = 0; j < BOX; j++) {
 
      printf("%c", grid[i][j]);
   }
   printf("\n");
}
printf("\n\n\n");

return 0;

}