TicTacToe With Classes

I feel that I have all the parts I need and I feel very close, however I cannot get my functions to be used in void main. Any help is appreciated! Thanks!

CODE

#include<iostream>
using namespace std;


class TTTBoard {
    public:
        void PrintBoard();
        char board[9] = { '1','2','3','4','5','6','7','8','9' };
        void WhosMove(char Turn);
        void Update();
        void UserSelectASlot(int Spot);
        void WinX();
        void WinY();
    };



void TTTBoard::WinX()
{
    
    if (board[0] == board[1] && board[1] == board[2])
    {
        if (board[0] == 'X')
            goto Win;
        else
            goto NoWin;
    }

    else

        if (board[3] == board[4] && board[4] == board[5])
        {
            if (board[3] == 'X')
                goto Win;
            else
                goto NoWin;
        }

        else

            if (board[6] == board[7] && board[7] == board[8])
            {
                if (board[6] == 'X')
                    goto Win;
                else
                    goto NoWin;
            }

            else

                if (board[0] == board[3] && board[3] == board[6])
                {
                    if (board[0] == 'X')
                        goto Win;
                    else
                        goto NoWin;
                }

                else

                    if (board[1] == board[4] && board[4] == board[7])
                    {
                        if (board[1] == 'X')
                            goto Win;
                        else
                            goto NoWin;
                    }

                    else

                        if (board[2] == board[5] && board[5] == board[8])
                        {
                            if (board[2] == 'X')
                                goto Win;
                            else
                                goto NoWin;
                        }

                        else

                            if (board[0] == board[4] && board[4] == board[8])
                            {
                                if (board[0] == 'X')
                                    goto Win;
                                else
                                    goto NoWin;
                            }

                            else

                                if (board[2] == board[4] && board[4] == board[6])
                                {
                                    if (board[2] == 'X')
                                        goto Win;
                                    else
                                        goto NoWin;
                                }

                                else
                                    goto Tie;
Win:
    cout << "Congratulations! You Won!";
NoWin:
    cout << "You didnt win :(";
Tie:
    cout << "You tied with a computer?";
    
}


void TTTBoard::WinY()
{
    
    if (board[0] == board[1] && board[1] == board[2])
    {
        if (board[0] == 'Y')
            goto Win;
        else
            goto NoWin;
    }

    else

        if (board[3] == board[4] && board[4] == board[5])
        {
            if (board[3] == 'Y')
                goto Win;
            else
                goto NoWin;
        }

        else

            if (board[6] == board[7] && board[7] == board[8])
            {
                if (board[6] == 'Y')
                    goto Win;
                else
                    goto NoWin;
            }

            else

                if (board[0] == board[3] && board[3] == board[6])
                {
                    if (board[0] == 'Y')
                        goto Win;
                    else
                        goto NoWin;
                }

                else

                    if (board[1] == board[4] && board[4] == board[7])
                    {
                        if (board[1] == 'Y')
                            goto Win;
                        else
                            goto NoWin;
                    }

                    else

                        if (board[2] == board[5] && board[5] == board[8])
                        {
                            if (board[2] == 'Y')
                                goto Win;
                            else
                                goto NoWin;
                        }

                        else

                            if (board[0] == board[4] && board[4] == board[8])
                            {
                                if (board[0] == 'Y')
                                    goto Win;
                                else
                                    goto NoWin;
                            }

                            else

                                if (board[2] == board[4] && board[4] == board[6])
                                {
                                    if (board[2] == 'Y')
                                        goto Win;
                                    else
                                        goto NoWin;
                                }

                                else
                                {
                                    goto Tie;
                                }
Win:
    cout << "Sorry you lost pal!";
NoWin :
    cout << "I'll beat you next time!";
Tie:
    cout << "Your lucky we tied!";
}


void TTTBoard::UserSelectASlot(int Spot)
{
    
    cout << "\nSelect the space you would like to place your marker in\n";
    cin >> Spot;
    //All Available Options For Open Spots
    if (Spot == 1)
    {
        board[0] = Spot;
    }
    else if (Spot == 2)
    {
        board[1] = Spot;
    }
    else if (Spot == 3)
    {
        board[2] = Spot;
    }
    else if (Spot == 4)
    {
        board[3] = Spot;
    }
    else if (Spot == 5)
    {
        board[4] = Spot;
    }
    else if (Spot == 6)
    {
        board[5] = Spot;
    }
    else if (Spot == 7)
    {
        board[6] = Spot;
    }
    else if (Spot == 8)
    {
        board[7] = Spot;
    }
    else if (Spot == 9)
    {
        board[8] = Spot;
    }
}




void TTTBoard::PrintBoard()
{
    //Designing the board
    cout <<"   "<< board[0] << " | " << board[1] << " | " << board[2] << endl;
    cout << "   _ _ _ _ _ \n" << endl;
    cout <<"   "<< board[3] << " | " << board[4] << " | " << board[5] << endl;
    cout << "   _ _ _ _ _ \n" << endl;
    cout <<"   "<< board[6] << " | " << board[7] << " | " << board[8] << endl;
    }



void TTTBoard::WhosMove(char Turn) {
    //Players Turn
        if (Turn == 'X')
        {
            Turn = 'O';
            cout << "It's my turn now!";
        }
    //Computers Turn
        else if(Turn == 'O')
        {
            Turn = 'X';
            cout << "It's your turn now!";
        }
}


void TTTBoard::Update()
{
    for (int x = 0; x < 9; x++)
    {
        cout << board[x] << "\t";
        if (x == 2 || x == 5 || x == 8)
            cout << "\n";
    }
}



int main()
{
        TTTBoard game;
    cout << "You have loaded a Tic-Tac-Toe Program!";
    cout << "\nIn this program you will be playing against a computer!";
    cout << "\nThe board will be printed with a series of numbers";
    cout << "\nYou will type that number in to choose that spot...if you go first";
    cout << "\n\n##################\nLet The Game Begin\n##################\n\n";
    cout << "\nYou are X and the Computer is O\n";
    class TTTBoard
    game.PrintBoard();
    game.WhosMove(Turn);
    game.UserSelectASlot(Spot);
    game.Update();
    game.WinX();
    game.WinY();

    
}   

I have been reading for a few hours on this, and I understand I can call to the function using &? I also found out that placing my integer or char in the game.function in main just sends that to my function, if I understood that correct.

I know there may be some small errors in other places, but for the most part I feel pretty good about it. If you can help me learn what's going on I would appreciate it, Thanks!