c++2025新年烟花代码可复制

### C++代码实现新年2025烟花效果

为了创建一个模拟烟花的效果，可以利用图形库如SFML或OpenGL。下面是一个基于SFML的简单示例程序[^1]：

#include <SFML/Graphics.hpp>
#include <vector>
#include <cstdlib>
#include <ctime>

struct Firework {
    sf::CircleShape shape;
    float lifeTime;
};

int main() {
    srand(static_cast<unsigned int>(time(0)));
    
    sf::RenderWindow window(sf::VideoMode(800, 600), "New Year 2025 Fireworks");
    std::vector<Firework> fireworks;

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

        // Add new firework every few frames randomly
        if ((rand() % 100) < 3) {
            Firework fw;
            fw.shape.setRadius(rand() % 10 + 5);
            fw.shape.setPosition(rand() % 800, rand() % 600);
            fw.shape.setFillColor(sf::Color(rand() % 256, rand() % 256, rand() % 256));
            fw.lifeTime = static_cast<float>(rand() % 50) / 10.f + .5f; // Random lifetime between 0.5s and 1s
            
            fireworks.push_back(fw);
        }

        for (auto& f : fireworks) {
            f.lifeTime -= 0.02f;
            if (f.lifeTime <= 0) {
                f.shape.setScale(f.lifeTime * 2, f.lifeTime * 2); // Shrink as it fades out
            }
        }

        // Remove expired particles
        fireworks.erase(std::remove_if(fireworks.begin(), fireworks.end(),
                                       [](const Firework &fw){return fw.lifeTime <= 0;}),
                        fireworks.end());

        window.clear();

        for (auto& f : fireworks) {
            window.draw(f.shape);
        }

        window.display();
        
        sf::sleep(sf::milliseconds(20)); // Control frame rate
    }

    return 0;
}

这段代码展示了如何使用SFML绘制圆形代表烟花，并通过随机位置、颜色和大小让它们看起来像真实的烟火爆炸。随着时间推移，这些圆会逐渐缩小并消失。