//GAME..H
    #ifndef GAME_H
    #define GAME_H
    #include <SFML/Graphics.hpp>

    class Game
    {

    public:
        Game();
        void run();

    private:
        void processEvents();
        void update();
        void render();
        void handlePlayerInput(sf::Keyboard::Key key, bool isPressed);
    private:
        sf::RenderWindow mWindow;
        sf::CircleShape mCircle;
        bool mIsMovingUp;
    };


    #endif


    // END GAME.H


    //GAME.CPP
    #include "Book/Games.h"
    Game::Game()
    :mWindow(sf::VideoMode(640,480), "SFML PROGRAM")
    ,mCircle()
    ,mIsMovingUp(false)
    {
        mCircle.setRadius(40.f);
        mCircle.setPosition(100.f, 100.f);
        mCircle.setFillColor(sf::Color::Red);


    }

    void Game::run()
    {
        while (mWindow.isOpen())
        {
            processEvents();
            update();
            render();

        }


    }

    void Game::handlePlayerInput(sf::Keyboard::Key key, bool isPressed)
    {
        if (key ==  sf::Keyboard::W)
            mIsMovingUp = isPressed;
    }

    void Game::processEvents()
    {

        sf::Event event;
            while (mWindow.pollEvent(event))
            {
                switch (event.type)
                {
                case sf::Event::KeyPressed:
                    handlePlayerInput(event.key.code, true);
                    break;
                case sf::Event::KeyReleased:
                    handlePlayerInput(event.key.code, false);
                    break;
                case sf::Event::Closed:
                    mWindow.close();
                    break;
                }
            }

    }

    void Game::render()
    {
        mWindow.clear();
        mWindow.draw(mCircle);
        mWindow.display();
    }

    void Game::update()
    {
        sf::Vector2f movement(0.f, 0.f);
        if (mIsMovingUp)
            movement.y -= 1.f;
        mCircle.move(movement);

    }


    //END GAME.CPP



    //MAIN.CPP

    #include "Book/Games.h"


    int main()
    {
        Game game;
        game.run();
    }


    // END MAIN.CPP