write the simple graphics program to print ``open'' boxes.

int printbox(int n)
{
 int i, j;
 for(j = 0; j < n; j = j + 1)
  printf("*");
 printf("\n");
 for(i = 0; i < n-2; i = i + 1)
  {
  printf("*");
  for(j = 0; j < n-2; j = j + 1)
   printf(" ");
  printf("*\n");
  }
 for(j = 0; j < n; j = j + 1)
  printf("*");
 printf("\n");
 return 0;
}