c语言实现烟花特效

实现烟花特效需要用到图形库，比如OpenGL或者SDL等。以下是一个基于SDL图形库的烟花特效的C语言实现代码示例：

#include <SDL2/SDL.h>
#include <stdlib.h>
#include <time.h>

// 烟花粒子结构体
typedef struct {
    double x, y; // 粒子位置
    double vx, vy; // 粒子速度
    double ax, ay; // 粒子加速度
    double radius; // 粒子半径
    double life; // 粒子寿命
    double max_life; // 粒子最大寿命
} Particle;

// 随机数生成函数
double rand_double(double min, double max) {
    return ((double)rand() / RAND_MAX) * (max - min) + min;
}

// 烟花爆炸函数
void explode(Particle particles[], int x, int y) {
    int i;
    for (i = 0; i < 100; i++) {
        particles[i].x = x;
        particles[i].y = y;
        particles[i].vx = rand_double(-200, 200);
        particles[i].vy = rand_double(-200, 200);
        particles[i].ax = 0;
        particles[i].ay = 50;
        particles[i].radius = rand_double(1, 3);
        particles[i].life = 0;
        particles[i].max_life = rand_double(0.5, 1.5);
    }
}

int main() {
    SDL_Window* window;
    SDL_Renderer* renderer;
    Particle particles[100];
    int running = 1;
    int i;

    // 初始化SDL
    SDL_Init(SDL_INIT_VIDEO);
    window = SDL_CreateWindow("Fireworks", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_SHOWN);
    renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);

    // 随机数种子初始化
    srand(time(NULL));

    while (running) {
        SDL_Event event;
        while (SDL_PollEvent(&event)) {
            if (event.type == SDL_QUIT) {
                running = 0;
            }
            if (event.type == SDL_MOUSEBUTTONDOWN) {
                explode(particles, event.button.x, event.button.y);
            }
        }

        // 清屏
        SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
        SDL_RenderClear(renderer);

        // 更新粒子状态
        for (i = 0; i < 100; i++) {
            particles[i].vx += particles[i].ax * 0.01;
            particles[i].vy += particles[i].ay * 0.01;
            particles[i].x += particles[i].vx * 0.01;
            particles[i].y += particles[i].vy * 0.01;
            particles[i].life += 0.01;
            if (particles[i].life > particles[i].max_life) {
                particles[i].radius = 0;
            }
        }

        // 绘制粒子
        for (i = 0; i < 100; i++) {
            SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255 * (1 - particles[i].life / particles[i].max_life));
            SDL_Rect rect = { particles[i].x - particles[i].radius, particles[i].y - particles[i].radius, particles[i].radius * 2, particles[i].radius * 2 };
            SDL_RenderFillRect(renderer, &rect);
        }

        // 更新屏幕
        SDL_RenderPresent(renderer);
    }

    // 释放资源
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();

    return 0;
}

该程序使用SDL库实现烟花特效，鼠标点击窗口即可触发烟花爆炸效果。在爆炸时，程序会生成100个粒子，并为每个粒子随机设置速度、加速度、大小和寿命等属性。程序主循环中，每帧更新粒子状态并重新绘制屏幕，从而实现烟花特效。