Thread: Stuck on a friend's challange

Code:

#include <iostream>
#include <iomanip>
using namespace std;

void box(int n) {
   int j = -1, k = -1;
   for (int i = 0; i < n * n; ++i) {
      if (j++ == n - 1) {
         k = -1;
         j = 0;
         cout << endl;
      } else if (j == i / n) {
         k = 0;
      } else if (j > i / n) {
         k = 1;
      }
      cout << setw(2) << k << ' ';
   }
}

int main() {
   int n;
   cout << "sides = " << flush;
   cin >> n;

   box(n);
   return 0;
}

Prints:

Code:

sides = 5
 0  1  1  1  1
-1  0  1  1  1
-1 -1  0  1  1
-1 -1 -1  0  1
-1 -1 -1 -1  0

Except its the other way around! One loop.

EDIT: Darn I wanted to not give him the correct code so I did it the opposite way. Oh well. Its an easy fix to make it the other way.