#include <string>
#include <iostream>
#include <cstdlib>
using namespace std;

string displayBoard(string board[9]);

int main()
{
   string board[9];          // tic tac toe, top row 0 thru 2, middle row 3 thru 5, bottom row 6 thru 8
   int position = 0;         // player's position
   bool gameOver = false;    // loop variable
   bool validMove = false;   // determines when valid move is inputted

   // initializing board with blank spaces
   for (int i = 0; i < 9; i++)	
   {
      board[i] = " ";        	
   }
      
   while (!gameOver)
   {
      validMove = false;

      while (!validMove)
      {
         cout << "Enter your position: ";
         cin >> position;

         if (board[position] == " " && position >= 0 && position <= 8)
         {
            validMove = true;
            board[position] = "x";
         }
         else
         {
            cout << "That position is already occupied." << endl;
            cout << displayBoard(board) << endl;
         }
			
      }

      cout << displayBoard(board) << endl; 
   }
      
   system("pause");
   return 0;
}// end of main

string displayBoard(string board[9])
{
   string str = "";
      
   for (int i = 0; i < 9; i++)
   {

      if (i == 0)
      {
         str = str  + "|" + board[i]; 
      }
      else if (i == 2 || i == 5)
      {
         str = str + board[i] + "|\n|";
      } 
      else if (i == 8)
      {
         str = str +  board[i] + "|\n";
      } 
      else
      {
         str = str + board[i];
      }

   }
      
   return str;
}// end of displayBoard