Example SFML

#include <SFML/Graphics.hpp>
//comandos para compilar  -lsfml-graphics -lsfml-window -lsfml-system
int main()
{
    sf::RenderWindow window(sf::VideoMode(200, 200), "Hello people");
    sf::CircleShape shape(100.f);
    shape.setFillColor(sf::Color::Green);

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

        window.clear();
        window.draw(shape);
        window.display();
    }
    return 0;
}