C++ Flappy Bird 游戏示例：使用 SFML 库

下面是一个使用 C++ 和 SFML 库编写的简单的 Flappy Bird 游戏示例：

#include <SFML/Graphics.hpp>

const int SCREEN_WIDTH = 800;
const int SCREEN_HEIGHT = 600;
const int PIPE_WIDTH = 100;
const int PIPE_HEIGHT = 400;
const int PIPE_GAP = 200;
const float GRAVITY = 0.5f;
const float JUMP_FORCE = 10.0f;

class Bird {
public:
    Bird(float x, float y) {
        shape.setPosition(x, y);
        shape.setRadius(20);
        shape.setFillColor(sf::Color::Yellow);
    }

    void update() {
        velocity += GRAVITY;
        shape.move(0, velocity);
    }

    void jump() {
        velocity = -JUMP_FORCE;
    }

    sf::CircleShape shape;
    float velocity = 0;
};

class Pipe {
public:
    Pipe(float x, float y) {
        topPipe.setPosition(x, y - PIPE_HEIGHT);
        topPipe.setSize(sf::Vector2f(PIPE_WIDTH, PIPE_HEIGHT));
        topPipe.setFillColor(sf::Color::Green);

        bottomPipe.setPosition(x, y + PIPE_GAP);
        bottomPipe.setSize(sf::Vector2f(PIPE_WIDTH, PIPE_HEIGHT));
        bottomPipe.setFillColor(sf::Color::Green);
    }

    void update() {
        topPipe.move(-2, 0);
        bottomPipe.move(-2, 0);
    }

    sf::RectangleShape topPipe;
    sf::RectangleShape bottomPipe;
};

int main() {
    sf::RenderWindow window(sf::VideoMode(SCREEN_WIDTH, SCREEN_HEIGHT), 'Flappy Bird');

    Bird bird(100, SCREEN_HEIGHT / 2);

    std::vector<Pipe> pipes;
    pipes.push_back(Pipe(SCREEN_WIDTH, SCREEN_HEIGHT / 2));

    sf::Clock clock;
    float deltaTime = 0.0f;

    while (window.isOpen()) {
        sf::Event event;
        while (window.pollEvent(event)) {
            if (event.type == sf::Event::Closed)
                window.close();
            else if (event.type == sf::Event::KeyPressed) {
                if (event.key.code == sf::Keyboard::Space)
                    bird.jump();
            }
        }

        deltaTime = clock.restart().asSeconds();

        bird.update();

        for (auto& pipe : pipes) {
            pipe.update();
            if (pipe.topPipe.getPosition().x < -PIPE_WIDTH) {
                pipes.erase(pipes.begin());
                pipes.push_back(Pipe(SCREEN_WIDTH, rand() % (SCREEN_HEIGHT - PIPE_HEIGHT - PIPE_GAP)));
            }
        }

        if (bird.shape.getPosition().y + bird.shape.getRadius() > SCREEN_HEIGHT || bird.shape.getPosition().y < 0) {
            // 游戏结束
            return 0;
        }

        window.clear();

        window.draw(bird.shape);

        for (auto& pipe : pipes) {
            window.draw(pipe.topPipe);
            window.draw(pipe.bottomPipe);
        }

        window.display();
    }

    return 0;
}

这只是一个简单的示例，游戏逻辑和图形都很简单。你可以根据自己的需求进行修改和扩展。