Code:
#include "Shapes.h"
#include "Global.h"


#include <iostream>
#include <SFML/Graphics.hpp>


Shapes::Shapes()
{
    //ctor
}


Shapes::~Shapes()
{
    //dtor
}


void Shapes::setShapes()
{
    MainButton1.setSize(sf::Vector2f(100,80));
    MainButton1.setPosition(sf::Vector2f( ScreenWidth/ 10 , ScreenHeight / 4 ));
    MainButton1.scale(2,1);
    MainButton1.setFillColor(sf::Color::White);
    MainButton1.setOutlineColor(sf::Color::Black);
    MainButton1.setOutlineThickness(3);


    MainButton2.setSize(sf::Vector2f(100,80));
    MainButton2.setPosition(sf::Vector2f( ScreenWidth/ 10 , ScreenHeight / 2.5 ));
    MainButton2.scale(2,1);
    MainButton2.setFillColor(sf::Color::White);
    MainButton2.setOutlineColor(sf::Color::Black);
    MainButton2.setOutlineThickness(3);


    MainButton1RED.setSize(sf::Vector2f(100,80));
    MainButton1RED.setPosition(sf::Vector2f( ScreenWidth/ 10 , ScreenHeight / 4 ));
    MainButton1RED.scale(2,1);
    MainButton1RED.setFillColor(sf::Color::Yellow);
    MainButton1RED.setOutlineColor(sf::Color::Black);
    MainButton1RED.setOutlineThickness(3);


    MainButton2RED.setSize(sf::Vector2f(100,80));
    MainButton2RED.setPosition(sf::Vector2f( ScreenWidth/ 10 , ScreenHeight / 2.5 ));
    MainButton2RED.scale(2,1);
    MainButton2RED.setFillColor(sf::Color::Yellow);
    MainButton2RED.setOutlineColor(sf::Color::Black);
    MainButton2RED.setOutlineThickness(3);


}


void Shapes::ChangeButtonColor( int buttonNum )
{
    if( buttonNum == 1) // this in main
    {
        buttonCOLOR = 1;
        setButtonColor(buttonCOLOR);
    }
    else if ( buttonNum == 2) // this in main
    {
        buttonCOLOR = 2;
        setButtonColor(buttonCOLOR);
    }
    else if ( buttonNum == 0) // this in main
    {
        buttonCOLOR = 0;
        setButtonColor(buttonCOLOR);
    }


}


int Shapes::setButtonColor(int buttonColor)
{
    this->buttonCOLOR = buttonCOLOR;
    return buttonCOLOR;
}


void Shapes::Draw(sf::RenderWindow &VoteApp)
{


    if( 0 == buttonCOLOR )
    {
        VoteApp.draw(MainButton1);
        VoteApp.draw(MainButton2);
        std::cout << "should paint the two buttons white" << std::endl;
    }
    else if( 1 == buttonCOLOR)
    {
        VoteApp.draw(MainButton1RED);
        VoteApp.draw(MainButton2);
        std::cout << "should paint the button 1 yellow" << std::endl;
    }
    else if( 2 == buttonCOLOR )
    {
        VoteApp.draw(MainButton2RED);
        VoteApp.draw(MainButton1);
        std::cout << "should paint the button 2 yellow" << std::endl;
    }


    std::cout << "buttonColor: " << buttonCOLOR << std::endl;
}
I don't understand why it print out buttonColor : 72, instead of the value from the Shapes::setButtonColor(int buttonCOLOR) function. How do I make the buttonCOLOR from Shapes::ChangeButtonColor(int buttonNum) to have the same value in the Shapes::raw(sf::RenderWindow &VoteApp) function?