Tic Tac Toe

    // 4/24/2013
    // Tic Tac Toe
    ////////////////////////////////////
    #include <iostream>
    #include <ctime>
    #include <cstdlib>
    using namespace std;




    void exit(){ // Quit program
    cout << "stop: Loaded successfully.";
    }

    void info(){ // Print instructions for this silly command-line game
    cout << "The rules of Tic Tac Toe should be burnt into your head already.\n";
    cout << "Choose either X or O and be the first to get 3 in a row!\n";
    cout << "In this command-line variant, the playing field is displayed like so: \n";
    cout << "###\n";
    cout << "###\n";
    cout << "###\n";
    cout << "The keys on your keyboard correspond to the nine locations on the grid.\n";
    cout << "To input your command, enter one of the following when prompted:\n";
    cout << "QWE\n";
    cout << "ASD\n";
    cout << "ZXC\n";
    cout << "The rest should be self-explanatory. Have fun!";
    }

    void game(){
        // Values for game board display
        enum PlayerLetter{BLANK, X, O};
        char q = '#', w = '#', e = '#';    // TopLeft, TopCenter, TopRight
        char a = '#', s = '#', d = '#';    // MiddleLeft, MiddleCenter, MiddleRight
        char z = '#', x = '#', c = '#';    // BottomLeft, BottomCenter, BottomRight
        // Other necessary variables
        char p1Letter;              // Player 1's letter
        char p2Letter;              // Player 2's letter
        char currentSpace;          // Space player chose
        int loopControl = 1;        // Putting loop stuff up top
        int turnsPassed = 0;        // Turns passed during game
        int currentPlayer = 1;      // redundant variable for display purposes
        char playerDisplay = 'X';   // Label current player


        while(loopControl==1){      // Choose player 1's input and set player 2's to the opposite
            cout << "Player 1: Choose your letter (X/O)." << endl;
            cin >> p1Letter;
            switch(p1Letter){
                case 'x':
                case 'X':
                    p2Letter = O;
                    --loopControl;
                    cout << "Player 1 is X. Player 2 is O." << endl;
                    break;
                case 'o':
                case 'O':
                    p2Letter = X;
                    --loopControl;
                    cout << "Player 1 is O. Player 2 is X." << endl;
                    break;
                default:
                    cout << "Invalid input." << endl;
                }
        } // end input


        cout << "Game start!" << endl;      // oh boy here comes the actual game
            srand(time(0));                 // generate random number to determine who goes first
            int random = (rand() % 2);
            if (random == 0){
            currentPlayer = false;          // simplify to a bool for logic purposes
        }
        else if (random == 1){
            currentPlayer = true;
        }

        while (turnsPassed < 9){
            if (currentPlayer == false){         // unsimplify for display purposes
                playerDisplay = 'X';}
            else {
                    playerDisplay = 'O';
            }
            cout << playerDisplay << " moves first." << endl;
            // MAIN DISPLAY CODE
            cout << q << w << e << endl; // print board
            cout << a << s << d << endl;
            cout << z << x << c << endl;
            cout << playerDisplay << ", pick a space to place your piece." << endl;
            cin >> currentSpace;

            /*
            Jesus, this code is a mess. Basically, it's 9 iterations of the same case statement; one for
            each letter-coded space in the grid. First, it checks if the space is empty, and then checks
            who's selecting the space. If the space is empty, it places the player's mark, passes the
            currentPlayer value over to the other player, and increments the turnsPassed value used to
            determine a tie when the game is over. The double-case statement is failproofing to accept
            input from either the uppercase or lowercase name.
            */
            switch(currentSpace){
                case 'Q':
                case 'q':
                    if ((q == '#') && (currentPlayer == 'X')){
                        q = 'X';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else if ((q == '#') && (currentPlayer == 'Y')){
                        q = 'Y';
                        currentPlayer = !currentPlayer;
                        turnsPassed = turnsPassed++;}
                    else {
                        cout << "Space is occupied or invalid. Choose another." << endl;
                        }
                    break;
                case 'W':
                case 'w':
                    if ((w == '#') && (currentPlayer == 'X')){
                        w = 'X';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else if ((w == '#') && (currentPlayer == 'Y')){
                        w = 'Y';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else {
                        cout << "Space is occupied or invalid. Choose another." << endl;
                        }
                    break;
                case 'E':
                case 'e':
                    if ((e == '#') && currentPlayer == 'X'){
                        e = 'X';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else if ((e == '#') && (currentPlayer == 'Y')){
                        e = 'Y';
                        currentPlayer = !currentPlayer;
                        turnsPassed = turnsPassed++;}
                    else {
                        cout << "Space is occupied or invalid. Choose another." << endl;
                        }
                    break;
                case 'A':
                case 'a':
                    if ((a == '#') && (currentPlayer == 'X')){
                        a = 'X';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else if ((a == '#') && (currentPlayer == 'Y')){
                        a = 'Y';
                        currentPlayer = !currentPlayer;
                        turnsPassed = turnsPassed++;}
                    else {
                        cout << "Space is occupied or invalid. Choose another." << endl;
                        }
                    break;
                case 'S':
                case 's':
                    if ((s == '#') && (currentPlayer == 'X')){
                        s = 'X';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else if ((s == '#') && (currentPlayer == 'Y')){
                        s = 'Y';
                        currentPlayer = 'X';
                        turnsPassed = turnsPassed++;}
                    else {
                        cout << "Space is occupied or invalid. Choose another." << endl;
                        }
                    break;
                case 'D':
                case 'd':
                    if ((d == '#') && (currentPlayer == 'X')){
                        d = 'X';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else if ((d == '#') && (currentPlayer == 'Y')){
                        d = 'Y';
                        currentPlayer = 'X';
                        turnsPassed = turnsPassed++;}
                    else {
                        cout << "Space is occupied or invalid. Choose another." << endl;
                        }
                    break;
                case 'Z':
                case 'z':
                    if ((z == '#') && (currentPlayer == 'X')){
                        z = 'X';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else if ((z == '#') && (currentPlayer == 'Y')){
                        z = 'Y';
                        currentPlayer = 'X';
                        turnsPassed = turnsPassed++;}
                    else {
                        cout << "Space is occupied or invalid. Choose another." << endl;
                        }
                    break;
                case 'X':
                case 'x':
                    if ((x == '#') && (currentPlayer == 'X')){
                        x = 'X';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else if ((x == '#') && (currentPlayer == 'Y')){
                        x = 'Y';
                        currentPlayer = 'X';
                        turnsPassed = turnsPassed++;}
                    else {
                        cout << "Space is occupied or invalid. Choose another." << endl;
                        }
                    break;
                case 'C':
                case 'c':
                    if ((c == '#') && (currentPlayer == 'X')){
                        c = 'X';
                        currentPlayer = 'Y';
                        turnsPassed = turnsPassed++;}
                    else if ((c == '#') && (currentPlayer == 'Y')){
                        c = 'Y';
                        currentPlayer = 'X';
                        turnsPassed = turnsPassed++;}
                    else {
                        cout << "Space is occupied or invalid. Choose another." << endl;
                        }
                    break;
                    }

                }

        }


    int main(){
        enum GameOption{BLANK, PLAY, INFO, EXIT};
        int menuOption = BLANK;
        cout << "Hello, and welcome to Tic Tac Toe!" << endl;
        cout << "To get started, please select an option:" << endl;
        cout << "1 to begin playing" << endl;
        cout << "2 for instructions on how to play" << endl;
        cout << "3 to exit the game" << endl;
        cin >> menuOption;
            switch(menuOption){
                case PLAY:
                    game();
                    break;
                case INFO:
                    info();
                    break;
                case EXIT:
                    exit();
                    break;
                default:
                    cout << "Unsupported input. Please try again." << endl;
                    break;
                }


    }