tictactoe.cpp

#include <iostream>
using namespace std;

char matrix[3][3] = {'1', '2', '3', '4', '5', '6', '7', '8', '9' };
char player = 'X'; 
int n;

void draw() {
    cout << "tic tac toe" << endl;
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            cout << matrix[i][j] << " ";
        }
        cout << endl;
    }   
    
}
void input() {
    int a; 
    cout << "press number you want... " << endl;
    cin >> a;

    if (a == 1) {
        if (matrix[0][0] == '1')
            matrix[0][0] = player;
        else {
            cout << "error" << endl;
            input();
        }
    }
    else if (a == 2) {
        if (matrix[0][1] == '2')
            matrix[0][1] = player;
        else {
            cout << "error" << endl;
            input();
        }
    }
    else if (a == 3) {
        if (matrix[0][2] == '3')
            matrix[0][2] = player;
        else {
            cout << "error" << endl;
            input();
        }
    }

    else if (a == 4) {
        if (matrix[1][0] == '4')
            matrix[1][0] = player;
        else {
            cout << "error" << endl;
            input();
        }
    }
    
    else if (a == 5) {
        if (matrix[1][1] == '5')
            matrix[1][1] = player;
        else {
            cout << "error" << endl;
            input();
        }
    }
        
    else if (a == 6) {
        if (matrix[1][2] == '6')
            matrix[1][2] = player;
        else {
            cout << "error" << endl;
            input();
        }
    }
        
    else if (a == 7) {
        if (matrix[2][0] == '7')
            matrix[2][0] = player;
        else {
            cout << "error" << endl;
            input();
        }
    }
       
    else if (a == 8) {
        if (matrix[2][1] == '8')
            matrix[2][1] = player;
        else {
            cout << "error" << endl;
            input();
        }
    }
        
    else if (a == 9) {
        if (matrix[2][2] == '9')
            matrix[2][2] = player;
        else {
            cout << "error" << endl;
            input();
        }
    }
}

void toggleplayer() {
    if (player == 'X')
        player = 'O';
    else player = 'X';
}

char win() {
    //player 1 
    if (matrix[0][0] == 'X' && matrix[0][1] == 'X' && matrix[0][2] == 'X')
        return 'X';
    if (matrix[1][0] == 'X' && matrix[1][1] == 'X' && matrix[1][2] == 'X')
        return 'X';
    if (matrix[2][0] == 'X' && matrix[2][1] == 'X' && matrix[2][2] == 'X')
        return 'X';

    if (matrix[0][0] == 'X' && matrix[1][0] == 'X' && matrix[2][0] == 'X')
        return 'X';
    if (matrix[0][1] == 'X' && matrix[1][1] == 'X' && matrix[2][1] == 'X')
        return 'X';
    if (matrix[0][2] == 'X' && matrix[1][2] == 'X' && matrix[2][2] == 'X')
        return 'X';

    if (matrix[0][0] == 'X' && matrix[1][1] == 'X' && matrix[2][2] == 'X')
        return 'X';
    if (matrix[2][0] == 'X' && matrix[1][1] == 'X' && matrix[0][2] == 'X')
        return 'X';

    //player 2
    if (matrix[0][0] == 'O' && matrix[0][1] == 'O' && matrix[0][2] == 'O')
        return 'O';
    if (matrix[1][0] == 'O' && matrix[1][1] == 'O' && matrix[1][2] == 'O')
        return 'O';
    if (matrix[2][0] == 'O' && matrix[2][1] == 'O' && matrix[2][2] == 'O')
        return 'O';

    if (matrix[0][0] == 'O' && matrix[1][0] == 'O' && matrix[2][0] == 'O')
        return 'O';
    if (matrix[0][1] == 'O' && matrix[1][1] == 'O' && matrix[2][1] == 'O')
        return 'O';
    if (matrix[0][2] == 'O' && matrix[1][2] == 'O' && matrix[2][2] == 'O')
        return 'O';

    if (matrix[0][0] == 'O' && matrix[1][1] == 'O' && matrix[2][2] == 'O')
        return 'O';
    if (matrix[2][0] == 'O' && matrix[1][1] == 'O' && matrix[0][2] == 'O')
        return 'O';

    return '/';
}



int main() {

    n = 0; 
    draw();

    while (1) {
        n++;
        input();
        draw();
        if(win() == 'X') {
            cout << "X wins!" << endl;
            break;
        }
        else if(win() == 'O') {
            cout << "O wins!" << endl;
        }
        else if (win() == '/' && n == 9) {
            cout << "Its a draw!" << endl;
        }
        toggleplayer();
        
    }

    system("pause");
    return 0;

}