井字游戏DeclareWinner (c++)

我已经制作了自己的第一款井字游戏，但我觉得有点困。我的问题:

• 如何让玩家获胜

• 如何使你不能在同一个地方输入数字两次

这是我的代码

#include "stdafx.h"
#include <iostream>
#include <iomanip>
#include <string>
void TTTBoard();
void players();
char playerX();
char playerO();
void boardWriterX(char, char);
void boardWriterO(char, char);
std::string row = "# 1 #       #       #       #";
std::string row2 = "# 2 #       #       #       #";
std::string row3 = "# 3 #       #       #       #";
bool refresh = false;
int playerTimer = 1;
int main()
{
    TTTBoard();
    return 0;
}
void TTTBoard()
{   
    do{ 
        std::cout << "#############################" << std::endl;
        std::cout << "#       1       2       3   #" << std::endl;
        std::cout << "#   #########################" << std::endl;
        std::cout << "#   #       #       #       #" << std::endl;
        std::cout << row << std::endl;
        std::cout << "#   #       #       #       #" << std::endl;
        std::cout << "#   #########################" << std::endl;
        std::cout << "#   #       #       #       #" << std::endl;
        std::cout << row2 << std::endl;
        std::cout << "#   #       #       #       #" << std::endl;
        std::cout << "#   #########################" << std::endl;
        std::cout << "#   #       #       #       #" << std::endl;
        std::cout << row3 << std::endl;
        std::cout << "#   #       #       #       #" << std::endl;
        std::cout << "#############################" << std::endl;
        refresh = false;
        } while (refresh);
    players();
}
void players()
{
    if (playerTimer % 2 == 0) 
    {
        std::cout << "its player[O] turn" << std::endl;
        std::cout << playerTimer << std::endl;
        playerTimer++;
        playerX();
    }
    else
    {
        std::cout << "its player[X] turn" << std::endl;
        std::cout << playerTimer << std::endl;
        playerTimer++;
        playerO();
    }
}
char playerX()
{
    char X, Y;
    std::cout << "Give the coordinates of you move" << std::endl;
    std::cout << "X as: ";
    std::cin >> X;
    std::cout << "Y as: ";
    std::cin >> Y;
    boardWriterX(X, Y);
    return X, Y;
}
char playerO()
{
    char X, Y;
    std::cout << "Give the coordinates of you move" << std::endl;
    std::cout << "X as: ";
    std::cin >> X; 
    std::cout << "Y as: ";
    std::cin >> Y;
    boardWriterO(X, Y);
    return X, Y;
}
void boardWriterX(char X, char Y)
{
    if (X == '1')
    {
        if (Y == '1')
        {
            row.replace(8, 1, "O");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '2')
        {
            row.replace(16, 1, "O");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '3')
        {
            row.replace(24, 1, "O");
            refresh = true;
            TTTBoard();
        }
    }
    else if (X == '2')
    {
        if (Y == '1')
        {
            row2.replace(8, 1, "O");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '2')
        {
            row2.replace(16, 1, "O");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '3')
        {
            row2.replace(24, 1, "O");
            refresh = true;
            TTTBoard();
        }
    }
    else if (X == '3')
    {
        if (Y == '1')
        {
            row3.replace(8, 1, "O");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '2')
        {
            row3.replace(16, 1, "O");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '3')
        {
            row3.replace(24, 1, "O");
            refresh = true;
            TTTBoard();
        }
    }
}
void boardWriterO(char X, char Y)
{
    if (X == '1')
    {
        if (Y == '1')
        {
            row.replace(8, 1, "X");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '2')
        {
            row.replace(16, 1, "X");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '3')
        {
            row.replace(24, 1, "X");
            refresh = true;
            TTTBoard();
        }
    }
    else if (X == '2')
    {
        if (Y == '1')
        {
            row2.replace(8, 1, "X");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '2')
        {
            row2.replace(16, 1, "X");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '3')
        {
            row2.replace(24, 1, "X");
            refresh = true;
            TTTBoard();
        }
    }
    else if (X == '3')
    {
        if (Y == '1')
        {
            row3.replace(8, 1, "X");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '2')
        {
            row3.replace(16, 1, "X");
            refresh = true;
            TTTBoard();
        }
        else if (Y == '3')
        {
            row3.replace(24, 1, "X");
            refresh = true;
            TTTBoard();
        }
    }
}