The Fascinating Magic Squares

//C++ code to generate odd-order Magic Squares
//Porting should be a POC
//(c) osix.net/~anilg
#include <iostream>
#define MAX 15
using namespace std;

int main()
{
  int order, n, X, Y, i, j, a[MAX][MAX],s;

  cout<<"Enter the order of matrix (odd) :";
  cin>>order;
  
  if(!order%2 || order>MAX) return -1; // for those who chose to be stubborn

  for(i=0;i<order;i++)
    for(j=0;j<order;j++)
      a[i][j]=0;

  X = 0;
  Y = order/2;

  for(n=1;n<=(order*order);n++)
  {
     a[X][Y] = n;
     if (a[(X+order-1)%order][(Y+order+1)%order])
       X = (X+order+1)%order ;
     else
       X = (X+order-1)%order , Y = (Y+order+1)%order ;
  }
  
  for(i=0;i<order; i++)
  {
    cout<<'n' ;
    for(j=0;j<order; cout<<a[i][j++]<<'t'); //for order>9,i'd change 't' to ' '
  }
  
  s= (1/2.0)*order*(1+order*order);
  cout<<"nnSum of Rows,Coulums,Diagonals = "<<s;

  system("pause>nul"); //getch() equivalent
                       // non-windows ppl remove this
  return 0;
}