cpp_tictactoe/tictactoev.cpp at main · aeron-gh/cpp_tictactoe · GitHub

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#include <bits/stdc++.h>
using namespace std;

char board[3][3];

bool valid(int r, int c)
{

    return r >= 0 and r < 3 and c >= 0 and c < 3 and board[r][c] == '_';
}

bool hasWon(char player)
{

    for (int i = 0; i < 3; i++)
    {
        if (board[i][0] == player && board[i][1] == player && board[i][2] == player)
        {
            return true;
        }
    }

    for (int j = 0; j < 3; j++)
    {
        if (board[0][j] == player && board[1][j] == player && board[2][j] == player)
        {
            return true;
        }
    }

    // diagonol 1
    if (board[0][0] == player && board[1][1] == player && board[2][2] == player)
    {
        return true;
    }
    // diagonal
    if (board[0][2] == player && board[1][1] == player && board[2][0] == player)
    {
        return true;
    }
    return false;
}

void displayboard()
{
    cout << "-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-" << endl;
    for (int i = 0; i < 3; i++)
    {
        for (int j = 0; j < 3; j++)
        {
            cout << board[i][j];
        }
        cout << endl;
    }
    cout <<"*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-" << endl;
}

int main()
{
    char player = 'X';
    int moves = 0;

    for (int i = 0; i < 3; i++)
    {
        for (int j = 0; j < 3; j++)
        {
            board[i][j] = '_';
        }
    }

    system("clear");
    displayboard();

    while (moves < 9)
    {
        int r, c;
        cin >> r >> c;

        if (valid(r, c) == false)
        {
            system("clear");
            displayboard();
            cout << "Invalid move, try again" << endl;
            continue;
        }
        // moves is valid

        board[r][c] = player;
        moves++;

        system("clear");
        displayboard();

        if (hasWon(player))
        {
            cout << "Player " << player << " has won the game" << endl;
            break;
        }

        if (moves == 9)
        {
            cout << "Its a draw";
            break;
        }

        // change the player
        if (player == 'X')
        {
            player = 'O';
        }
        else
        {
            player = 'X';
        }
    }

    return 0;
}