ros小海龟模拟器问题

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

int main()
{
    sf::RenderWindow window(sf::VideoMode(800, 600), "Turtle Simulator");

    // 创建两个小海龟
    sf::CircleShape turtle1(10.f);
    turtle1.setFillColor(sf::Color::Red);
    turtle1.setPosition(100.f, 100.f);

    sf::CircleShape turtle2(10.f);
    turtle2.setFillColor(sf::Color::Green);
    turtle2.setPosition(400.f, 300.f);

    sf::Clock clock;

    while (window.isOpen())
    {
        sf::Event event;

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

        // 获取两个小海龟的实时坐标和速度
        sf::Vector2f turtle1Pos = turtle1.getPosition();
        sf::Vector2f turtle2Pos = turtle2.getPosition();

        sf::Time elapsedTime = clock.getElapsedTime();
        float turtle1Speed = std::sqrt(std::pow(turtle1Pos.x - 400.f, 2) + std::pow(turtle1Pos.y - 300.f, 2)) / elapsedTime.asSeconds();
        float turtle2Speed = std::sqrt(std::pow(turtle2Pos.x - 100.f, 2) + std::pow(turtle2Pos.y - 100.f, 2)) / elapsedTime.asSeconds();

        clock.restart();

        // 绘制两个小海龟的位置和速度信息
        std::cout << "Turtle1 Position: (" << turtle1Pos.x << ", " << turtle1Pos.y << ")" << std::endl;
        std::cout << "Turtle1 Speed: " << turtle1Speed << std::endl;

        std::cout << "Turtle2 Position: (" << turtle2Pos.x << ", " << turtle2Pos.y << ")" << std::endl;
        std::cout << "Turtle2 Speed: " << turtle2Speed << std::endl;

        window.clear();

        // 绘制六角星
        sf::CircleShape star1(100.f, 6);
        star1.setPosition(400.f, 300.f);
        star1.setOutlineThickness(2.f);
        star1.setOutlineColor(sf::Color::White);
        star1.setFillColor(sf::Color::Transparent);

        // 绘制五角星
        sf::ConvexShape star2;
        star2.setPointCount(5);
        star2.setFillColor(sf::Color::Blue);
        star2.setOutlineThickness(2.f);
        star2.setOutlineColor(sf::Color::White);

        // 设置五角星的位置
        star2.setPosition(100.f, 100.f);

        // 绘制五角星的每一个顶点
        float angle = 0.f;
        float rotationSpeed = 50.f;
        float radius = 50.f;

        for (int i = 0; i < 5; ++i)
        {
            float x = std::cos(angle * M_PI / 180.f) * radius;
            float y = std::sin(angle * M_PI / 180.f) * radius;

            star2.setPoint(i, sf::Vector2f(x, y));

            angle += 72.f;
            radius /= 1.618f;
        }

        window.draw(star1);
        window.draw(star2);
        window.draw(turtle1);
        window.draw(turtle2);

        window.display();
    }

    return 0;
}