#include <iostream>
#include <windows.h>

using namespace std;

char n[10] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', }; // numbers on the game board
char player = 'X'; // player symbol
int win = 0;
int ms[10] = {0,2,7,6,9,5,1,4,3,8}; //magic square template
int wins[10]; // magic square to work out win

void debug()
{
    cout << ms[1] << ms[2] << ms[3] << endl;
    cout << ms[4] << ms[5] << ms[6] << endl;
    cout << ms[7] << ms[8] << ms[9] << endl;

    cout << wins[1] << wins[2] << wins[3] << endl;
    cout << wins[4] << wins[5] << wins[6] << endl;
    cout << wins[7] << wins[8] << wins[9] << endl;
}

void checkwin()
{
    if(
    (wins[1] + wins[2] + wins[3] == 15) ||
    (wins[4] + wins[5] + wins[6] == 15) ||
    (wins[7] + wins[8] + wins[9] == 15) ||
    (wins[1] + wins[4] + wins[7] == 15) ||
    (wins[2] + wins[5] + wins[8] == 15) ||
    (wins[3] + wins[6] + wins[9] == 15) ||
    (wins[1] + wins[5] + wins[9] == 15) ||
    (wins[3] + wins[5] + wins[7] == 15))

    {
        win = 1;
    }

    else if(
    (wins[1] + wins[2] + wins[3] == -15) ||
    (wins[4] + wins[5] + wins[6] == -15) ||
    (wins[7] + wins[8] + wins[9] == -15) ||
    (wins[1] + wins[4] + wins[7] == -15) ||
    (wins[2] + wins[5] + wins[8] == -15) ||
    (wins[3] + wins[6] + wins[9] == -15) ||
    (wins[1] + wins[5] + wins[9] == -15) ||
    (wins[3] + wins[5] + wins[7] == -15))

    {
        win = 1; // will change this later for score
    }
}

void turn()
{
    if (player == 'X')
    {
        player = 'O';
    }
    else
    {
        player = 'X';
    }
}

void choice()
{
    int a;
    cout << "Enter a number:" << endl;
    cin >> a;

    if( isdigit(n[a]) == 1 ) // checks to see if square is already taken
    {

        if((a > 0) && (a < 10)) // checks to see if valid choice
        {
            n[a] = player;

            if(player == 'X')
            {
                wins[a] = wins[a] + ms[a]; // if winning magic square tiles add up to +15, X wins
            }
            else
            {
                wins[a] = wins[a] - ms[a]; // if they add up to -15 O wins.
            }
        }
                turn();
    }


        else
    {
        cout << "try again" << endl;
        Sleep(1500);
    }


}

void board()
{
    system("CLS");
    cout << "     |   |   " << endl; // gameboard start
    cout << "   " << n[1] << " | " << n[2] << " | " << n[3] << "  " << endl;
    cout << "  ___|___|___" << endl;
    cout << "     |   |   " << endl;
    cout << "   " << n[4] << " | " << n[5] << " | " << n[6] << "  " << endl;
    cout << "  ___|___|___" << endl;
    cout << "     |   |   " << endl;
    cout << "   " << n[7] << " | " << n[8] << " | " << n[9] << "  " << endl;
    cout << "     |   |   " << endl; // gameboard end
    cout << endl;
}

int main()
{
    board();
    //debug();

    while (win == 0)
    {
    choice();
    board();
    //debug();
    checkwin();
    }
    turn();
    system("CLS");
    cout << "Player " << player << " wins!" << endl;

    system("pause");
    return 0;
}