ticTacToe.cpp

#include <iostream>
#include <cstring>
#include <stdlib.h>
using namespace std;

void blank_board(char board[][4], int size);
bool player_turn(char board[][4], int size, bool &player_1);
bool win_check_X(char board[][4], int size, int &wins_1);
bool win_check_O(char board[][4], int size, int &wins_2);
bool tie_check(char board[][4], int size);

int main (int argc, char* argv[])
{
    int games;          //number of games to be played
    int played = 0;     //number of games played so far
    int wins_1 = 0;     //number of wins for player 1
    int wins_2 = 0;     //number of wins for player 2
    char board[4][4];   //tic tac toe board
    int size = 4;       //size of array row
    bool player_1;      //bool value to help switch turns
    bool over_X;        //bool value to tell if X won a game
    bool over_O;        //bool value to tell if O won a game
    bool tie;           //is game tied

    //if no command line entered default number of games to 1
    if(argc == 1)
        games = 1;

    //if command line entered, games equals number entered by user
    else
        games = atoi(argv[1]);

    do
    {
        cout << "Tic Tac Toe is based on a 3x3 grid.  Please select your moves "
         << "by entering your position in coordinate form." << endl;

        blank_board(board, size);

        if(played % 2 == 0)
        {
            cout << "Player 1, you are 'X' and will be going first.\n";
            player_1 = true;
        }

        else
        {
            cout << "Player 2, you are 'O' and will be going first.\n";
            player_1 = false;
        }

        do
        {

            player_1 = player_turn(board, size, player_1);
            over_X = win_check_X(board, size, wins_1);
            over_O = win_check_O(board, size, wins_2);
            tie = tie_check(board, size);

        }while((over_X == false) && (over_O == false) && (tie == false));

        if(over_X == true)
            cout << "Player 1 has won the game.\n";
        if(over_O == true)
            cout << "Player 2 has won the game.\n";
        if(tie == true)
            cout << "That game was a tie.\n";

        played++;

    }while(played < games);

    cout << "Player 1 has won " << wins_1 << " games." << endl;
    cout << "Player 2 has won " << wins_2 << " games." << endl;

    if(wins_1 > wins_2)
        cout << "Player 1 is the overall victor.\n";
    if(wins_2 > wins_1)
        cout << "Player 2 is the overall victor.\n";
    if(wins_1 == wins_2)
        cout << "The end result is a tie.\n";

    return 0;
}

void blank_board(char board[][4], int size)
{
    board[0][0] = ' ';
    board[0][1] = '1';
    board[0][2] = '2';
    board[0][3] = '3';
    board[1][0] = '1';
    board[2][0] = '2';
    board[3][0] = '3';

    board[1][1] = '.';
    board[2][1] = '.';
    board[3][1] = '.';
    board[1][2] = '.';
    board[2][2] = '.';
    board[3][2] = '.';
    board[1][3] = '.';
    board[2][3] = '.';
    board[3][3] = '.';

    for (int i = 0; i < 4; i++)
    {
        for (int j = 0; j < 4; j++)
        {
            cout << board[i][j] << " ";
        }

        cout << endl;
    }
}

bool player_turn(char board[][4], int size, bool &player_1)
{
    int row;
    int col;

    if(player_1 == true)
    {
        cout << "Player 1, please enter your move: ";
        cin >> row;
        cin >> col;

        while(board[row][col] == '.')
        {
            cout << "That space has already been taken.\n";
            cout << "Player 1, please enter another move: ";
            cin >> row;
            cin >> col;
        }

        board[row][col] = 'X';

        for (int i = 0; i < 4; i++)
        {
            for (int j = 0; j < 4; j++)
            {
                 cout << board[i][j] << " ";
            }

            cout << endl;
        }

        return false;

    }

    if(player_1 == false)
    {
        cout << "Player 2, please enter your move: ";
        cin >> row;
        cin >> col;

        while(board[row][col] == '.')
        {
            cout << "That space has already been taken.\n";
            cout << "Player 2, please enter another move: ";
            cin >> row;
            cin >> col;
        }

        board[row][col] = 'O';

        for (int i = 0; i < 4; i++)
        {
            for (int j = 0; j < 4; j++)
            {
                 cout << board[i][j] << " ";
            }

            cout << endl;

        }

        return true;
    }
}

bool win_check_X(char board[][4], int size, int &wins_1)
{
    if (board[1][1] == 'X' && board[2][2] == 'X' && board[3][3] == 'X')
    {
        wins_1++;
        return true;
    }

    else if (board[3][1] == 'X' && board[2][2] == 'X' && board[1][3] == 'X')
    {
        wins_1++;
        return true;
    }

    else if (board[1][1] == 'X' && board[1][2] == 'X' && board[1][3] == 'X')
    {
        wins_1++;
        return true;
    }

    else if (board[1][2] == 'X' && board[2][2] == 'X' && board[3][2] == 'X')
    {
        wins_1++;
        return true;
    }

    else if (board[1][3] == 'X' && board[2][3] == 'X' && board[3][3] == 'X')
    {
        wins_1++;
        return true;
    }

    else if (board[2][1] == 'X' && board[2][2] == 'X' && board[2][3] == 'X')
    {
        wins_1++;
        return true;
    }

    else if (board[3][1] == 'X' && board[3][2] == 'X' && board[3][3] == 'X')
    {
        wins_1++;
        return true;
    }

    else if (board[1][1] == 'X' && board[2][1] == 'X' && board[3][1] == 'X')
    {
        wins_1++;
        return true;
    }

    else
        return false;
}

bool win_check_O(char board[][4], int size, int &wins_2)
{
    if (board[1][1] == 'O' && board[2][2] == 'O' && board[3][3] == 'O')
    {
        wins_2++;
        return true;
    }

    else if (board[3][1] == 'O' && board[2][2] == 'O' && board[1][3] == 'O')
    {
        wins_2++;
        return true;
    }

    else if (board[1][1] == 'O' && board[1][2] == 'O' && board[1][3] == 'O')
    {
        wins_2++;
        return true;
    }

    else if (board[1][2] == 'O' && board[2][2] == 'O' && board[3][2] == 'O')
    {
        wins_2++;
        return true;
    }

    else if (board[1][3] == 'O' && board[2][3] == 'O' && board[3][3] == 'O')
    {
        wins_2++;
        return true;
    }

    else if (board[2][1] == 'O' && board[2][2] == 'O' && board[2][3] == 'O')
    {
        wins_2++;
        return true;
    }

    else if (board[3][1] == 'O' && board[3][2] == 'O' && board[3][3] == 'O')
    {
        wins_2++;
        return true;
    }

    else if (board[1][1] == 'O' && board[2][1] == 'O' && board[3][1] == 'O')
    {
        wins_2++;
        return true;
    }

    else
        return false;
}

bool tie_check(char board[][4], int size)
{

    if (board[1][1] != '.' && board[1][2] != '.' && board[1][3] == '.'
        && board[2][1] != '.' && board[2][2] != '.' && board[2][3] == '.'
        && board[3][1] != '.' && board[3][2] != '.' && board[3][3] == '.')
    {
        return true;
    }

    return false;
}