tictactoe

#include <iostream>
#include <string>

using namespace std;
char Square[10] = { 'o', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

void Board();
void CheckWin();
void CheckDraw();
void PlayerMark();
bool GameFin = false;
int Turns = 0;
int Player = 1;
char Game = 'P';
char Mark;

void Board()
{
    system("cls");
     cout << "+---+---+---+" << endl;
     cout << "| " << Square[1] << " | " << Square[2] << " | " << Square[3] << " |" << endl;
     cout << "+---+---+---+" << endl;
     cout << "| " << Square[4] << " | " << Square[5] << " | " << Square[6] << " |" << endl;
     cout << "+---+---+---+" << endl;
     cout << "| " << Square[7] << " | " << Square[8] << " | " << Square[9] << " |" << endl;
     cout << "+---+---+---+" << endl;
}


void PlayerMark()
{
  if (Player == 1)
  Mark = 'X';
  if (Player == 2)
  Mark = 'O';
}

void NewPlayer()
{
    if ((Player == 1))
      Player = 2;
    else if ((Player == 2))
      Player = 1;
}

void CheckWin()
{
    if (Square[1] == Square[2] && Square[2] == Square[3])
          Game = 'W';
	else if (Square[4] == Square[5] && Square[5] == Square[6])
          Game = 'W';
	else if (Square[7] == Square[8] && Square[8] == Square[9])
	      Game = 'W';
	else if (Square[1] == Square[4] && Square[4] == Square[7])
	      Game = 'W';
	else if (Square[2] == Square[5] && Square[5] == Square[8])
	      Game = 'W';
	else if (Square[3] == Square[6] && Square[6] == Square[9])
	      Game = 'W';
	else if (Square[1] == Square[5] && Square[5] == Square[9])
	      Game = 'W';
	else if (Square[3] == Square[5] && Square[5] == Square[7])
	      Game = 'W';
}


void CheckDraw()
{
if (Turns == 9)
Game = 'D';
}


int main()
{
     int Choice;

     cout << "Welcome to tic-tac-toe" << endl;
     cout << "Player 1 is X, Player 2 is O." << endl;
     while(GameFin == false)
     {
      Board();
      cout << "Player " << Player << "'s turn." << endl;
      cout << "Enter a number of where you would like to take your move" << endl;
      cin >> Choice;
      PlayerMark();

    if (Choice == 1 && Square[1] == '1')
            Square[1] = Mark;
	else if (Choice == 2 && Square[2] == '2')
            Square[2] = Mark;
	else if (Choice == 3 && Square[3] == '3')
            Square[3] = Mark;
	else if (Choice == 4 && Square[4] == '4')
            Square[4] = Mark;
	else if (Choice == 5 && Square[5] == '5')
            Square[5] = Mark;
	else if (Choice == 6 && Square[6] == '6')
            Square[6] = Mark;
	else if (Choice == 7 && Square[7] == '7')
	        Square[7] = Mark;
	else if (Choice == 8 && Square[8] == '8')
            Square[8] = Mark;
	else if (Choice == 9 && Square[9] == '9')
	        Square[9] = Mark;
	else
	    cout << "Move is invalid" << endl;

        CheckWin();

        if (Game == 'W')
           GameFin = true;

        Turns = Turns + 1;
        CheckDraw();

        if (Game == 'D')
           GameFin = true;

        if (Game == 'P')
           NewPlayer();

     }

   Board();

   if (Game == 'D')
       cout << "Game is a draw." << endl;
   else if (Game == 'W')
       cout << "Congratulations player " << Player << ", you win!" << endl;

   return 0;
}