Program checkwin not working

[UnclePutin]

I'm making a tic tac toe, and so far it's working pretty good (still some things to add in the future though). However, I have a checkwin function that is supposed check if either player 1 or player 2 has won, and if the function returns true, it is supposed to end the game. But it doesn't do this. Any ideas?

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <string>

using namespace std;

bool checkwin();

char player1_mark;
char player2_mark;

//********BOARDSTATUS CLASS*********
//Holds information about board.
//

class Boardstatus
{

char A1;
char A2;
char A3;
char B1;
char B2;
char B3;
char C1;
char C2;
char C3;

public:

    int setsquarestatus( string square, char status )
    {
        int squarenumber = enumerator ( square );
        switch ( squarenumber )
        {
        case 1:
            A1 = status;
            break;
        case 2:
            A2 = status;
            break;
        case 3:
            A3 = status;
            break;
        case 4:
            B1 = status;
            break;
        case 5:
            B2 = status;
            break;
        case 6:
            B3 = status;
            break;
        case 7:
            C1 = status;
            break;
        case 8:
            C2 = status;
            break;
        case 9:
            C3 = status;
            break;
        }
    }

    char getsquarestatus( string square )
    {
        int squarenumber = enumerator( square );
        switch ( squarenumber )
        {
        case 1:
            return A1;
            break;
        case 2:
            return A2;
            break;
        case 3:
            return A3;
            break;
        case 4:
            return B1;
            break;
        case 5:
            return B2;
            break;
        case 6:
            return B3;
            break;
        case 7:
            return C1;
            break;
        case 8:
            return C2;
            break;
        case 9:
            return C3;
            break;
        }
    }

    //End of public

private:

    //This function acts similar to an enumerator, but instead returns a number 1-9 based
    //on what string x is entered so that the switch cases in get and setsquarestatus will
    //function properly (they require int or char to work)
    int enumerator( string x )
    {
       if ( x == "A1" )
       {
           return 1;
       }

       else if ( x == "A2" )
       {
           return 2;
       }

       else if (x == "A3")
       {
           return 3;
       }

       else if (x == "B1")
       {
           return 4;
       }

       else if (x == "B2")
       {
           return 5;
       }

       else if (x == "B3")
       {
           return 6;
       }

       else if (x == "C1")
       {
           return 7;
       }

       else if (x == "C2")
       {
           return 8;
       }

       else if (x == "C3")
       {
           return 9;
       }
    }



};




//*********BOARDPRINT FUNCTION***********
//
//
void boardprint( Boardstatus& BSTAT)
{
	system("cls");
	cout << "\n\n\tTic Tac Toe\n\n";

	cout << "Player 1 (" << player1_mark << ")  -  Player 2 (" << player2_mark << ")" << endl << endl;
	cout << endl;
	cout << "   1     2     3" << endl;

	cout << "      |     |     " << endl;
	cout << "A  " << BSTAT.getsquarestatus("A1") << "  |  " << BSTAT.getsquarestatus("A2") << "  |  " << BSTAT.getsquarestatus("A3") << endl;

	cout << " _____|_____|_____" << endl;
	cout << "      |     |     " << endl;

	cout << "B  " << BSTAT.getsquarestatus("B1") << "  |  " << BSTAT.getsquarestatus("B2") << "  |  " << BSTAT.getsquarestatus("B3") << endl;

	cout << " _____|_____|_____" << endl;
	cout << "      |     |     " << endl;

	cout << "C  " << BSTAT.getsquarestatus("C1") << "  |  " << BSTAT.getsquarestatus("C2") << "  |  " << BSTAT.getsquarestatus("C3") << endl;

	cout << "      |     |     " << endl << endl;
}

bool checkwin( Boardstatus& BSTAT)
{
    //Row 'A' checkwin
    if (BSTAT.getsquarestatus("A1")==BSTAT.getsquarestatus("A2") && BSTAT.getsquarestatus("A2")==BSTAT.getsquarestatus("A3"))
    {
        return true;
    }
    //Row 'B' checkwin
    else if (BSTAT.getsquarestatus("B1")==BSTAT.getsquarestatus("B2") && BSTAT.getsquarestatus("B2")==BSTAT.getsquarestatus("B3"))
    {
        return true;
    }
    //Row 'C' checkwin
    else if (BSTAT.getsquarestatus("C1")==BSTAT.getsquarestatus("C2") && BSTAT.getsquarestatus("C2")==BSTAT.getsquarestatus("C3"))
    {
        return true;
    }
    //Column 1 checkwin
    else if (BSTAT.getsquarestatus("A1")==BSTAT.getsquarestatus("B1") && BSTAT.getsquarestatus("B1")==BSTAT.getsquarestatus("C1"))
    {
        return true;
    }
    //Column 2 checkwin
    else if (BSTAT.getsquarestatus("A2")==BSTAT.getsquarestatus("B2") && BSTAT.getsquarestatus("B2")==BSTAT.getsquarestatus("C2"))
    {
        return true;
    }
    //Column 3 checkwin
    else if (BSTAT.getsquarestatus("A3")==BSTAT.getsquarestatus("B3") && BSTAT.getsquarestatus("B3")==BSTAT.getsquarestatus("C3"))
    {
        return true;
    }
    //Diagonal upper-left->bottom-right checkwin
    else if (BSTAT.getsquarestatus("A1")==BSTAT.getsquarestatus("B2") && BSTAT.getsquarestatus("B2")==BSTAT.getsquarestatus("C3"))
    {
        return true;
    }
    //Diagonal lower-left->upper-right checkwin
    else if (BSTAT.getsquarestatus("A3")==BSTAT.getsquarestatus("B2") && BSTAT.getsquarestatus("B2")==BSTAT.getsquarestatus("C1"))
    {
        return true;
    }
    else
    {
        return false;
    }
}

void playerturn( Boardstatus& BSTAT )
{

    string squareselection;
    cout << "Player 1, enter the square you want to play.";
    cin >> squareselection;
    BSTAT.setsquarestatus ( squareselection, player1_mark );
    boardprint(BSTAT);

    checkwin(BSTAT);

//Note, the if statement below is supposed check if checkwin is false, but for some reason it only works if it checks checkwin is true. This means checkwin is returning true when it isn't supposed to.
    if (checkwin(BSTAT)==true)
    {
    cout << "Player 2, enter the square you want to play.";
    cin >> squareselection;
    BSTAT.setsquarestatus ( squareselection, player2_mark );
    boardprint(BSTAT);
    }

}


int main()
{
//Start of initializing all squares as a blank
Boardstatus BSTAT;
BSTAT.setsquarestatus( "A1", ' ' );
BSTAT.setsquarestatus( "A2", ' ' );
BSTAT.setsquarestatus( "A3", ' ' );
BSTAT.setsquarestatus( "B1", ' ' );
BSTAT.setsquarestatus( "B2", ' ' );
BSTAT.setsquarestatus( "B3", ' ' );
BSTAT.setsquarestatus( "C1", ' ' );
BSTAT.setsquarestatus( "C2", ' ' );
BSTAT.setsquarestatus( "C3", ' ' );
//End of square initialization

boardprint(BSTAT);

    do
    {
        cout << "Player 1, choose X or O: ";
        cin >> player1_mark;
        cin.clear();
        cin.sync();
        if ( player1_mark == 'X' )
        {
            player2_mark = 'O';
        }
        else if (player1_mark == 'O' )
        {
            player2_mark = 'X';
        }
        else
        {
            cout << "Invalid character. Please try again." << endl;
        }
    } while ( player1_mark != 'X' && player1_mark != 'O');

    boardprint(BSTAT);

//The do while statement needs to check if checkwin is false, not true, again showing that checkwin is returning true when it isn't supposed to.
    do
    {
    playerturn(BSTAT);
    } while (checkwin(BSTAT) == true);

    return 0;
}

[shadowCODE]

your program does not output anything on ma machine apart from an empty board. It does not check for any conditions. In fact, its infinite.
So I cant help you.

[UnclePutin]

Why would that be? It's working on my computer. You can also use the online compiler, seems to be working there too.