[2448] 별찍기 - 11

#include <iostream>
#include <string>
using namespace std;
string arr[3072][6144];
void star(int n, int x, int y);
int main()
{
   int i, j;
   int num;
   cin >> num;
   for (i = 0; i < num; i++)
   {
      for (j = 0; j < num*2; j++)
      {
         if (j == num * 2 - 1)
            arr[i][j] = '\0';
         else
            arr[i][j] = " ";
      }
   }
   star(num, num - 1, 0);
   for (i = 0; i < num; i++)
   {
      for (j = 0; j < num * 2; j++)
         cout << arr[i][j];
      cout << "\n";
   }
   return 0;
}
void star(int n, int x, int y)
{
   if (n == 3)
   {
      arr[y][x] = "*";
      arr[y+1][x-1] = "*";
      arr[y+1][x+1] = "*";
      arr[y+2][x-2] = "*";
      arr[y+2][x-1] = "*";
      arr[y+2][x] = "*";
      arr[y+2][x+1] = "*";
      arr[y+2][x+2] = "*";
      return;
   }
   star(n / 2, x, y);
   star(n / 2, x - (n / 2), y + (n / 2));
   star(n / 2, x + (n / 2), y + (n / 2));
}