tictactoe.cpp

#include <iostream>
#include <conio.h>
 
using namespace std;
 
class TicTacToe{
private:
char board[3][3];
char mark;
int turn;
int won;
int input;
public:
TicTacToe():board{'1','2','3','4','5','6','7','8','9'}{
turn = 1;
mark = 'O';
won = 0;
input = 0;
}
int GetResult(){
return won;
}
void Play(){
for(int i=0; i<9; i++){
system("cls");
PrintBoard();
Input();
int validInput = AddMark();
if( !validInput ){
i--;
continue;
}
Result(i);
if(won != 0) break;
turn = !turn;
}
}
void Result(int i){
if(Check()){
system("cls");
PrintBoard();
if(turn){
cout<<endl<<"*** Player 1 - You Won ***";
won = 1;
return;
}
else {
cout<<endl<<"*** Player 2 - You Won ***";
won = 2;
return;
}
}
if( i==8 ){
system("cls");
PrintBoard();
cout<<endl<<"*** Match Draw ***";
won = 3;
return;
}
won = 0;
}
void Input(){
cin>>input;
while(input<0 || input >9){
cout<<"Invalid input. Please re-enter: ";
cin>>input;
}
if(turn) mark = 'O';
else mark = 'X';
}
void PrintBoard(){
cout<<" "<<board[0][0]<<" | "<<board[0][1]<<" | "<<board[0][2]<<" "<<endl;
cout<<"-----------"<<endl;
cout<<" "<<board[1][0]<<" | "<<board[1][1]<<" | "<<board[1][2]<<" "<<endl;
cout<<"-----------"<<endl;
cout<<" "<<board[2][0]<<" | "<<board[2][1]<<" | "<<board[2][2]<<" "<<endl;
if(turn) cout<<"O - Player 1: ";
else cout<<"X - Player 2: ";
}
int AddMark(){
for(int i=0, k=1; i<3; i++){
for(int j=0; j<3; j++, k++){
if(k == input){
if(board[i][j]!='O' && board[i][j]!='X'){
board[i][j] = mark;
return 1;
}
else return 0;
}
}
}
}
int Check(){
//rows
if( board[0][0]==mark && board[0][1]==mark &&board[0][2]==mark )
return 1;
if( board[1][0]==mark && board[1][1]==mark &&board[1][2]==mark )
return 1;
if( board[2][0]==mark && board[2][1]==mark &&board[2][2]==mark )
return 1;
//columns
if( board[0][0]==mark && board[1][0]==mark &&board[2][0]==mark )
return 1;
if( board[0][1]==mark && board[1][1]==mark &&board[2][1]==mark )
return 1;
if( board[0][2]==mark && board[1][2]==mark &&board[2][2]==mark )
return 1;
//diagonals
if( board[0][0]==mark && board[1][1]==mark &&board[2][2]==mark )
return 1;
if( board[0][2]==mark && board[1][1]==mark &&board[2][0]==mark )
return 1;
}
void Reset(){
board[0][0] = '1'; board[0][1] = '2'; board[0][2] = '3';
board[1][0] = '4'; board[1][1] = '5'; board[1][2] = '6';
board[2][0] = '7'; board[2][1] = '8'; board[2][2] = '9';
turn = 1;
mark = 'O';
won = 0;
input = 0;
}
};
 
int main(){
TicTacToe t;
char replay;
do{
t.Play();
t.Reset();
cout<<endl<<endl<<"Do you want to play again (Y/N): ";
replay = getche();
}while(replay=='y'||replay=='Y');
getch();
return 0;
}