TicTacToe (2010)

main.cpp

//Omar Evans
//TicTacToe Version 2
#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>
#ifdef WIN32
#include <windows.h>
#define clear() system("cls")
#else
#include <unistd.h>
#define Sleep(X) usleep(1000 * X)
#define clear() system("clear")
#endif
using namespace std;

class TicTacToe {
private:
    unsigned int mode, winner, p1Score, p2Score;
    char board[3][3];
    void menu();
    void resetGame();
    void display();
    void p1Move();
    void p2Move();
    bool fill(int box, char mark);
    int checkWinner();
public:
    TicTacToe();
    void run();
};

int main()
{
    TicTacToe game;

    cout << "TicTacToe 2.0" << endl << "Omar Evans" << endl << endl;
    game.run();

    return(0);
}

TicTacToe::TicTacToe()
{
    srand((unsigned) time(NULL));
    p1Score = 0;
    p2Score = 0;
}

void TicTacToe::run()
{
    menu();
    while(mode) {
        resetGame();
        clear();
        display();

        while(!winner){
            p1Move();
            clear();
            display();
            if((winner = checkWinner())) continue;
            p2Move();
            clear();
            display();
            winner = checkWinner();
        }
        switch(winner) {
            case 1:
                p1Score++;
                clear();
                display();
                cout << "Player 1 won!" << endl;
                break;
            case 2:
                p2Score++;
                clear();
                display();
                cout << "Player 2 won!" << endl;
                break;
            case 3:
                cout << "It's a draw!" << endl;
                break;
        }

        menu();
    }
}

void TicTacToe::menu()
{
    do {
        cout << "Choose one of the following options:" << endl
             << "(1) Play against the computer" << endl
             << "(2) Play against another person" << endl
             << "(0) Quit" << endl
             << "Option: ";
        cin >> mode;
    } while(mode > 2);

}

void TicTacToe::resetGame()
{
    int x, y;

    winner = 0;
    for(x = 0; x < 3; x++) {
        for(y = 0; y < 3; y++) {
            board[x][y] = ' ';
        }
    }
}

void TicTacToe::display()
{
    int x, y;

    cout << setfill('0')
         << "P1 " << setw(8) << p1Score
         << endl
         << "P2 " << setw(8) << p2Score
         << endl << endl;
    for(x = 0; x < 3; x++) {
        cout << setfill(' ')
             << 9 - 3 * x - 2 << setw(3) << "|"
             << 9 - 3 * x - 1 << setw(3) << "|"
             << 9 - 3 * x - 0 << endl;
        for(y = 0; y < 3; y++) {
            cout << setw(2) << board[x][y];
            if(y < 2) cout << setw(2) << "|";
        }
        cout << endl;
        if(x < 2) cout << setfill('_');
        cout << setw(4) << "|" << setw(4) << "|" << setw(3) << "" << endl;
    }
}

void TicTacToe::p1Move()
{
    int box;

    do {
        cout << "Player 1: Choose an empty box: ";
        cin >> box;
    } while(!fill(box, 'X'));
}

void TicTacToe::p2Move()
{
    int box;

    do {
        if(mode == 2) {
            cout << "Player 2: Choose an empty box: ";
            cin >> box;
        } else {
            box = rand() % 9 + 1;
        }
    } while(!fill(box, 'O'));
    
    if(mode == 1) Sleep(500);
}

bool TicTacToe::fill(int box, char mark)
{
    bool success = true;
    int x, y;

    if(1 <= box && box <= 9) {
        x = 3 - (box + 2) / 3;
        y = (box - 1) % 3;
        if(board[x][y] == ' ') {
            board[x][y] = mark;
        } else {
            if(mode != 1 || mark == 'X') cout << box << " is not an empty box." << endl;
            success = false;
        }
    } else {
        if(mode != 1 || mark == 'X') cout << box << " is not a valid box." << endl;
        success = false;
    }

    return(success);
}

int TicTacToe::checkWinner()
{
    int x,y, winner = 3; //Assumes a draw unless proven otherwise.

    //If any box is empty, the game is assumed to continue, unless proven otherwise.
    for(x = 0; x < 3 && winner == 3; x++) {
        for(y = 0; y < 3 && winner == 3; y++) {
            if(board[x][y] == ' ') winner = 0;
        }
    }
    //Checks rows for a winner
    for(x = 0; x < 3 && (winner != 1 && winner != 2); x++) {
        if(board[x][0] == 'X' && board[x][0] == board[x][1] && board[x][1] == board[x][2])
            winner = 1;
        else if (board[x][0] == 'O' && board[x][0] == board[x][1] && board[x][1] == board[x][2])
            winner = 2;
    }
    //Checks columns for a winner
    for(y = 0; y < 3 && (winner != 1 && winner != 2); y++) {
        if(board[0][y] == 'X' && board[0][y] == board[1][y] && board[1][y] == board[2][y])
            winner = 1;
        else if (board[0][y] == 'O' && board[0][y] == board[1][y] && board[1][y] == board[2][y])
            winner = 2;
    }
    //Checks diagonals for a winner
    if(winner != 1 && winner != 2) {
        if(board[0][0] == 'X' && board[0][0] == board[1][1] && board[1][1] == board[2][2])
            winner = 1;
        else if(board[0][0] == 'O' && board[0][0] == board[1][1] && board[1][1] == board[2][2])
            winner = 2;
        else if(board[0][2] == 'X' && board[0][2] == board[1][1] && board[1][1] == board[2][0])
            winner = 1;
        else if(board[0][2] == 'O' && board[0][2] == board[1][1] && board[1][1] == board[2][0])
            winner = 2;
    }
    return(winner);
}