tictactoe.cpp

#include <iostream>

using namespace std;
char square[9] = {'0','1','2','3','4','5','6','7','8'};

int checkwin()
{
        if (square[0] == square [1]  && square[1] == square[2] )
        {    if ( square [0] == 'X' )
            return 1;
            else
            return 2;
        }
        else
        if (square[3] == square [4]  && square[4] == square[5] )
            {    if ( square [3] == 'X' )
            return 1;
            else
            return 2;
        }
        else
        if (square[6] == square [7]  && square[7] == square[8] )
            {    if ( square [6] == 'X' )
            return 1;
            else
            return 2;
        }
        else
        if (square[0] == square [3]  && square[3] == square[6] )
            {    if ( square [0] == 'X' )
            return 1;
            else
            return 2;
        }
        else
        if (square[1] == square [4]  && square[4] == square[7] )
            {    if ( square [1] == 'X' )
            return 1;
            else
            return 2;
        }
    else
        if (square[2] == square [5]  && square[5] == square[8] )
            {    if ( square [2] == 'X' )
            return 1;
            else
            return 2;
        }
else
        if (square[0] == square [4]  && square[4] == square[8] )
            {    if ( square [0] == 'X' )
            return 1;
            else
            return 2;
        }
    else
        if (square[2] == square [4]  && square[4] == square[6] )
            {    if ( square [2] == 'X' )
            return 1;
            else
            return 2;
        }
    else
        if (square[0] == square [3]  && square[3] == square[6] )
            {    if ( square [0] == 'X' )
            return 1;
            else
            return 2;
        }
    else
        return 0;
}

void mark(int player, int box)
{
    if (player == 1 )
    {

        square[box] = 'X';
    }
    else
        square[box] = 'Y';
}

void display()
{
        for(int i=0;i<9;i++)
        {
            cout<< square[i] << "\t" ;
                if (i == 2 || i== 5 || i==8)
                    cout<<"\n";
}
}
int main()
{
    cout<<"0  1  2"<<endl;
    cout<<"3  4  5"<<endl;
    cout<<"6  7  8"<<endl;
        int player1 = 1, player2 =2 ;
        
        int box, result = 0, flag = 0;
        
        for(int i=1;i<5;i++)
    {

        cout<< "\n Player " << player1 << " Enter the Box";
        cin>> box;
        mark( player1, box);
        display();

        result =checkwin();
        if (result == 1 )
        {    cout<<"\n Congratualtions! player " << player1 << " has Won ";
            flag = 1;
            break;
        }
        else
        if (result == 2 )
        {    cout<<"\n Congratualtions! player " << player2 << " has Won ";
            flag = 1;
            break;
        }

        cout<< "\n Player " << player2 << " Enter the Box";
        cin>> box;
        mark ( player2, box);
        display();
        
        result =checkwin();
        if (result == 1 )
        {    cout<<"\n Congratualtions! player " << player1 << " has Won ";
            flag = 1;
            break;
        }
        else
        if (result == 2 )
        {    cout<<"\n Congratualtions! player " << player2 << " has Won ";
            flag = 1;
            break;
        }
}
        if (flag == 0 )
        cout<<" \n Sorry, The game is a draw ";
    
    return 0;
}