Hi there this is my first post here :)

So I got an assignment about TicTacToe project
here's a basic header and main file of my project

I think i should made a basic one before adding some "advanced" features

please help with the logic of the command undo

thank you in advance

<code>
//headerfile
//TicTacToe.h
#ifndef TICTACTOE_H
#define TICTACTOE_H

class TicTacToe
{
private:
    enum Status {WIN,DRAW,CONTINUE};
    int board[3][3];
public:
    TicTacToe();
    void makeMove();
    void printBoard();
    bool validMove(int,int);
    bool xoMove(int);
    Status gameStatus();
};
#endif
</code>



//main file
//TicTacToe.cpp

#include <iostream>
using std::cin;
using std::cout;

#include <iomanip>
using std::setw;

#include "TicTacToe.h"

TicTacToe::TicTacToe()
{
    for( int j = 0; j < 3; j++ )
        for ( int k = 0; k< 3; k++ )
        board[j][k]='';
}

bool TicTacToe::validMove(int r, int c)
{
    return r>= 0 && r<3 && c>= 0 && c < 3 &&
board[r][c]=='';
}

TicTacToe::Status TicTacToe::gameStatus()
{
    int a;

    if(board[0][0]!='' && board[0][0] == board [1][1] &&
        board[0][0]==board[2][2])
        return WIN;

    else if ( board[2][0]!='' && board [2][0] == board [1][1] && board [2][0] == board[0][2])
        return WIN;

    for(a=0;a<3;a++)

        if(board[a][0] != '' && board[a][0] == board [a][1] && board [a][0] == board[a][2])
            return WIN;

    for(a=0;a<3;++a)

        if(board[0][a] != '' && board[0][a] == board[1][a] && board [0][a] == board [2][a] )
            return WIN;

    for(int r=0;r<3;++r)

        for(int c=0;c<3;++c)

            if(board[r][c] =='')
                return CONTINUE;

        return DRAW;
}

void TicTacToe::printBoard()
{
    cout<<"   0   1   2\n\n";

    for(int r=0;r<3;++r)
    {
        cout<<r;

        for(int c=0;c<3;++c)
        {
            cout<<setw(3)<<static_cast< char > (board[r][c]);

            if (c!=2)
                cout<<" |";
        }

        if(r!=2)
            cout<<"\n__|__|__\n       |   |   \n";
    }
    cout<<"\n\n";
}

void TicTacToe::makeMove()
{
    printBoard();

    while (true)
    {
        if(xoMove('X'))
            break;
        else if(xoMove('O'))
            break;
    }
}

bool TicTacToe::xoMove(int symbol)

{
    int x;
    int y;

    do
    {
        cout<<"Player"<<static_cast< char >(symbol)<<"enter move:";
        cin>>x>>y;
        cout<<"\n";
    } 
    while (!validMove(x,y));

    board[x][y]= symbol;
    printBoard();
    Status xoStatus = gameStatus();

    if (xoStatus == WIN)
    {
        cout<<"Player"<<static_cast<char>(symbol)<<"wins!\n";
            return true;
    }
    else if (xoStatus == DRAW)
    {
        cout<<"Game is a draw\n";
            return true;
    }
    else
        return false;
}

you simply Push your state into std::stack every time before user make a move and , undo
option will pop out the pervious state from the stack and it will be the current game
state.

Since you need to keep track of a whopping 8 moves, a stack seems to be overkill. Just add each move to an array.

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