TicTacToe.cpp

//Code courtesy - CSI SFIT
#include<iostream>
using namespace std;
char square[10] = {'0','1','2','3','4','5','6','7','8','9'};
int checkwin()              // Checks whether player has won or tie has happened
{
    if (square[1]==square[2] && square[2]==square[3])
        return 1;
    else if (square[4]==square[5] && square[5]==square[6])
        return 1;
    else if (square[7]==square[8] && square[8]==square[9])
        return 1;
    else if (square[1]==square[4] && square[4]==square[7])
        return 1;
    else if (square[2]==square[5] && square[5]==square[8])
        return 1;
    else if (square[3]==square[6] && square[6]==square[9])
        return 1;
    else if (square[1]==square[5] && square[5]==square[9])
        return 1;
    else if (square[3]==square[5] && square[5]==square[7])
        return 1;
    else if (square[1]!='1'&&square[2]!='2'&&square[3]!='3'&&square[4]!='4'&&square[5]!='5'&&square[6]!='6'&&square[7]!='7'&&square[8]!='8'&&square[9]!='9')
        return 0;
    else
        return -1;
}
// Game Board
void board()
{
    cout<<"\n\n\tTic Tac Toe\n\n";
    cout<<"Player 1(X) - Player 2(O)"<<endl<<endl;
    cout<<endl;
    cout<<"     |     |     "<<endl;
    cout<<"  "<<square[1]<<"  |  "<<square[2]<<"  |  "<<square[3]<<endl;
    cout<<"_____|_____|_____"<<endl;
    cout<<"     |     |     "<<endl;
    cout<<"  "<<square[4]<<"  |  "<<square[5]<<"  |  "<<square[6]<<endl;
    cout<<"_____|_____|_____"<<endl;
    cout<<"     |     |     "<<endl;
    cout<<"  "<<square[7]<<"  |  "<<square[8]<<"  |  "<<square[9]<<endl;
    cout<<"     |     |     "<<endl;
}
int main()
{
    int player=1,i,choice;
    char mark;
    do
    {
        cout<<endl;
        board();
        player=(player%2)?1:2;
        cout<<"\nPlayer "<<player<<", enter a number: ";
        cin>>choice;
        mark=(player==1)?'X':'O';
        if (choice==1&&square[1]=='1')
            square[1]=mark;
        else if (choice==2&&square[2]=='2')
            square[2]=mark;
        else if (choice==3&&square[3]=='3')
            square[3]=mark;
        else if (choice==4&&square[4]=='4')
            square[4]=mark;
        else if (choice==5&&square[5]=='5')
            square[5]=mark;
        else if (choice==6&&square[6]=='6')
            square[6]=mark;
        else if (choice==7&&square[7]=='7')
            square[7]=mark;
        else if (choice==8&&square[8]=='8')
            square[8]=mark;
        else if (choice==9&&square[9]=='9')
            square[9]=mark;
        else
        {
            cout<<"Invalid move!"<<endl;
            player--;
            cin.ignore();
            cin.get();
        }
        i=checkwin();
        player++;
    }while(i==-1);
    board();
    if(i==1)
        cout<<"\n\n==>\aPlayer "<<--player<<" WINS!"<<endl;
    else
        cout<<"\n\n==>\aGame Draw."<<endl;
    return 0;
}