Tic tac toe game in c++ source code





Source Code :

//Tic-Tac-Toe Game
//
#include <iostream>

using namespace std;

void display_board();
void player_turn();
bool gameover();

char turn;
bool draw = false;
char board[3][3] = {{'1', '2', '3'}, {'4', '5', '6'}, {'7', '8', '9'}};

int main()
{
    cout << "Tic Tac Toe Game\n";
    cout << "Player 1 [X] --- Player 2 [O]\n";
    turn = 'X';
 
    while (!gameover())
    {
        display_board();
        player_turn();
        gameover();
    }
 
    if (turn == 'O' && !draw)
    {
        display_board();
        cout << endl << endl << "Player 1 [X] Wins! Game Over!\n";
    }
    else if (turn == 'X' && !draw)
    {
        display_board();
        cout << endl << endl << "Player 2 [O] Wins! Game Over!\n";
    }
    else
    {
        display_board();
        cout << endl << endl << "It's a draw! Game Over!\n";
    }
}

void display_board()
{
    cout << "---------------------" << endl << endl;
    cout << "     |     |     " << endl;
    cout << "  " << board[0][0] << "  |  " << board[0][1] << "  |  " << board[0][2] << endl;
    cout << "_____|_____|_____" << endl;
    cout << "     |     |     " << endl;
    cout << "  " << board[1][0] << "  |  " << board[1][1] << "  |  " << board[1][2] << endl;
    cout << "_____|_____|_____" << endl;
    cout << "     |     |     " << endl;
    cout << "  " << board[2][0] << "  |  " << board[2][1] << "  |  " << board[2][2] << endl;
    cout << "     |     |     " << endl;
}

void player_turn()
{
    int choice;
    int row = 0, column = 0;
 
    if (turn == 'X')
    {
        cout << "Player 1 turn [X]: ";
    }
    else if (turn == 'O')
    {
        cout << "Player 2 turn [O]: ";
    }
    cin >> choice;
 
    switch (choice)
    {
        case 1: row = 0; column = 0; break;
        case 2: row = 0; column = 1; break;
        case 3: row = 0; column = 2; break;
        case 4: row = 1; column = 0; break;
        case 5: row = 1; column = 1; break;
        case 6: row = 1; column = 2; break;
        case 7: row = 2; column = 0; break;
        case 8: row = 2; column = 1; break;
        case 9: row = 2; column = 2; break;
        default:
            cout << "You didn't enter a correct number! Try again\n";
            player_turn();
    }
 
    if (turn == 'X' && board[row][column] != 'X' && board[row][column] != 'O')
    {
        board[row][column] = 'X';
        turn = 'O';
    }
    else if (turn == 'O' && board[row][column] != 'X' && board[row][column] != 'O')
    {
        board[row][column] = 'O';
        turn = 'X';
    }
    else
    {
        cout << "The cell you chose is used! Try again\n";
        player_turn();
    }

}

bool gameover()
{
    for (int i = 0; i < 3; i++)//Check for a win
    {
        if ((board[i][0] == board[i][1] && board[i][1] == board[i][2]) || (board[0][i] == board[1][i] && board[1][i] == board[2][i]) || (board[0][0] == board[1][1] && board[1][1] == board[2][2]) || (board[0][2] == board[1][1] && board[1][1] == board[2][0]))
        {
            return true;
        }
    }
 
    for (int i = 0; i < 3; i++)//Check for draw
    {
        for (int j = 0; j < 3; j++)
        {
            if (board[i][j] != 'X' && board[i][j] != 'O')
            {
                return false;
            }
        }
    }
    draw = true;
    return true;
}

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