TicTacToe in C++

tictactoe.cpp

#include <iostream>
#define true 1
#define false 0
using namespace std;
//typedef int bool;

enum Symbol
{
	Cross,
	Zero,
	Blank
};

enum GameResult {
	None,
	Draw,
	CrossWins,
	ZeroWins
};

enum Turn {
	Player1,
	Player2
};
/*


*/
GameResult checkResult(Symbol ptr[4][4]) {
	// check horizontal rows
	for(int i=0;i<4;i++) {
		/*
			Logic:
				It will store first symbol in prev and then cmp
				it with all other symbol and if all matched then 
				that symbol player wins
		*/
		bool flag = true;
		Symbol prev = ptr[i][0];
		if(prev == Blank) {
			continue;
		}
		for(int j=1;j<4;j++) {
			if(prev != ptr[i][j]) {
				flag = false;
			}
		}
		if(flag == true) {
			if(prev == Cross) {
				return CrossWins;
			} else if(prev = Zero) {
				return ZeroWins;
			}
		}
	}
	
	// now check for vertical row
	for(int j=0;j<4;j++) {
		bool flag = true;
		Symbol prev = ptr[0][j];
		if(prev == Blank) {
			continue;
		}
		// now since first elem is not blank 
		// check for other elem
		for(int i=1;i<4;i++) {
			if(ptr[i][j] != prev) {
				flag = false;
			}
		}
		if(flag == true) {
			if(prev == Cross) {
				return CrossWins;
			} else if(prev = Zero) {
				return ZeroWins;
			}
		}
	}
	
	// diagonal
	Symbol prev = ptr[0][0];
	if(prev != Blank) {
		bool flag = true;
		for(int i=1;i<4;i++) {
			if(ptr[i][i] != prev) {
				flag = false;
			}
		}
		if(flag == true) {
			if(prev == Cross) {
				return CrossWins;
			} else if(prev = Zero) {
				return ZeroWins;
			}
		}
	}
	
	prev = ptr[0][3];
	if(prev != Blank) {
		bool flag = true;
		for(int i = 1;i<4;i++) {
			if(prev != ptr[i][3-i]) {
				flag = false;
			}
		}
		if(flag == true) {
			if(prev == Cross) {
				return CrossWins;
			} else if(prev = Zero) {
				return ZeroWins;
			}
		}
	}
	
	for(int i=0;i<4;i++) {
		for(int j=0;j<4;j++) {
			if(ptr[i][j] == Blank) {
				return None;
			} 
		}
	}
	
	return Draw;

}

/*
	It will print the TicTacToe Matrix
	
	Input: 4x4 matrix
	Output: Print visual of matrix using symbols in StdOut
*/
void printMatrix(Symbol ptr[4][4]) {
	for (int i = 0; i < 4; ++i)
	{
		for (int j = 0; j < 4; ++j)
		{
			switch(ptr[i][j]) {
				case Cross:
					cout << "X";
					break;
				case Zero:
					cout << "0";
					break;
				case Blank:
					cout << "-";
					break;
			}
			cout << " ";
		}
		cout << endl;
	}
}

void flipTurn(Turn &tmp) {
	if(tmp == Player1) {
		tmp = Player2;
	} else {
		tmp = Player1;
	}
}



int main() {
	Symbol mat[4][4];
	// First set all the box to Blank
	for (int i = 0; i < 4; ++i)
	{
		for (int j = 0; j < 4; j++)
		{
			mat[i][j] = Blank;
		}
	}
	
	
	// For playing
	cout << "For Player 1 = X  and for Player 2 = O" << endl;
	Turn state = Player1;
	GameResult  res = None;
	do {
		// notify which player you are
		if(state == Player1) {
			cout << "You are playing as player 1" << endl;
		} else {
			cout << "You are playing as player2" << endl;
		}
		// now print current tictac toe matrix
		printMatrix(mat);
		cout << "now enter your move x, y :";
		int x,y;
		cin >> x >> y;
		// validate the move
		if((x > 0 && x < 5) && (y > 0 && y<5) && (mat[x-1][y-1] == Blank)) {
			if(state == Player1) {
				mat[x-1][y-1] = Cross;
			} else {
				mat[x-1][y-1] = Zero;
			}
			res = checkResult(mat);
			flipTurn(state);
		} else {
			cout << "Invalid Input" << endl;
		}
	} while(res == None);
	cout << "Game Ended : ";
	switch(res) {
		case Draw:
			cout << "Game Draw";
			break;
		case CrossWins:
			cout << "Player1 Wins";
			break;
		case ZeroWins:
			cout << "Player2 Wins";
			break;
	}
	cout << endl;

}