int main() { sf::Clock clock; sf::RenderWindow window(sf::VideoMode(1000, 701), "Game"); GameSystem sys = GameSystem(&window, clock); while (window.isOpen()) { sf::Event evt; while (window.pollEvent(evt)) { if (evt.type == sf::Event::Closed) { window.close(); } } window.clear(); sys.Update(1e-2f); sys.Draw(); window.display(); } return 0; }