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


using namespace std;
int main()
{
    bool Jump=true;
    const float gravitation = 5;
    int GroundHeight = 499 , JumpSpeed = 30;
    sf::Vector2f Vel (sf::Vector2f (0,0));
    sf::RectangleShape rect1(sf::Vector2f(120, 50));
    rect1.setFillColor(sf::Color::Blue);
    rect1.setSize(sf::Vector2f(20, 20));
    rect1.setPosition(0,50);

    sf::RenderWindow window(sf::VideoMode(500, 500), "SFML works!");
    window.setFramerateLimit(60);
    while (window.isOpen())
    {

        Vel.x = 0;
        if(sf::Keyboard::isKeyPressed(sf::Keyboard::Space)&&rect1.getPosition().y + rect1.getSize().y == GroundHeight){
            Vel.y = -JumpSpeed;
            rect1.move(Vel.x,Vel.y);
        }else if(rect1.getPosition().y + rect1.getSize().y < GroundHeight){
            Vel.y += gravitation;
            rect1.move(0,Vel.y);
        }else{
        rect1.setPosition(rect1.getPosition().x , GroundHeight - rect1.getSize().x);
        }


        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                window.close();
        }

        window.clear(sf::Color::Black);
        window.draw(rect1);
        window.display();
    }

    return 0;
}