// ********* TICTACTOE DEMO IN OBJECTIVE-C *********
// using printf instead of NSLog
// using 1 instead of X
// using 2 instead of O

#import <Foundation/Foundation.h>


// ********* TICTACTOE INTERFACE *******************

@interface TicTacToe: NSObject
{
   int playerTurn;	// 0 for player X, 1 for player O
   int board[10];	// only using 1-9
}

-(void) drawBoard;
-(void) changePlayerTurn;
-(void) make1In: (int) position;
-(void) make2In: (int) position;

@end // end of TicTacToe interface

// ********* TICTACTOE IMPLEMENTATION **************

@implementation TicTacToe

-(void) drawBoard 
{
   printf("\n%i | %i | %i\n", board[1], board[2], board[3]);
   printf("%i | %i | %i\n", board[4], board[5], board[6]);
   printf("%i | %i | %i\n", board[7], board[8], board[9]);
}

-(void) changePlayerTurn
{

   if (playerTurn == 1) 
   {
      playerTurn = 2;
   }
   else 
   {
      playerTurn = 0;
   }
   
}

-(void) make1In: (int) position
{
   board[position] = 1;
}

-(void) make2In: (int) position
{
   board[position] = 2;
}

@end  // end of TicTacToe implementation

// ****************** CLIENT *******************

int main(int argc, const char * argv[])
{
   NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
   
   int pos = 0;		// board position
   TicTacToe *ttt = [TicTacToe alloc] ;
   
   printf("Welcome to TicTacToe");
   printf("Board Positions:");
   printf("\n1 | 2 | 3\n");
   printf("4 | 5 | 6\n");
   printf("7 | 8 | 9\n\n\n");
   
   
   printf("Enter a position number: ");
   scanf("%i", &pos);
   [ttt make1In: pos];
   [ttt drawBoard];
   [ttt changePlayerTurn];
   
    
   printf("Enter a position number: ");
   scanf("%i", &pos);
   [ttt make2In: pos];
   [ttt drawBoard];
   [ttt changePlayerTurn];
     
   
   
   // free memory
   [ttt release];

   [pool drain];
   return 0;
}// end of main