用c语言写一个爱心会动的程序

以下是一个使用C语言和SDL图形库编写的爱心动画程序：

#include <SDL2/SDL.h>
#include <stdio.h>

// 窗口大小
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;

// 爱心坐标
int heart_x = 0;
int heart_y = 0;

// 爱心大小
int heart_width = 100;
int heart_height = 100;

// 爱心颜色
Uint8 heart_r = 0;
Uint8 heart_g = 0;
Uint8 heart_b = 0;

// 初始化SDL和窗口
bool init();

// 载入媒体文件
bool loadMedia();

// 释放媒体文件和SDL
void close();

// 主函数
int main(int argc, char* args[]) {
    // 初始化SDL和窗口
    if (!init()) {
        printf("Failed to initialize!\n");
        return 1;
    }

    // 载入媒体文件
    if (!loadMedia()) {
        printf("Failed to load media!\n");
        return 2;
    }

    // 循环更新爱心属性和绘制爱心
    bool quit = false;
    SDL_Event e;
    while (!quit) {
        // 处理事件
        while (SDL_PollEvent(&e) != 0) {
            if (e.type == SDL_QUIT) {
                quit = true;
            }
        }

        // 更新爱心位置
        heart_x = (heart_x + 5) % (SCREEN_WIDTH - heart_width);
        heart_y = (heart_y + 5) % (SCREEN_HEIGHT - heart_height);

        // 更新爱心大小
        heart_width = (heart_width + 1) % 200;
        heart_height = (heart_height + 1) % 200;

        // 更新爱心颜色
        heart_r = (heart_r + 1) % 256;
        heart_g = (heart_g + 2) % 256;
        heart_b = (heart_b + 3) % 256;

        // 清空屏幕
        SDL_SetRenderDrawColor(gRenderer, 0xFF, 0xFF, 0xFF, 0xFF);
        SDL_RenderClear(gRenderer);

        // 绘制爱心
        SDL_Rect heartRect = { heart_x, heart_y, heart_width, heart_height };
        SDL_SetRenderDrawColor(gRenderer, heart_r, heart_g, heart_b, 0xFF);
        SDL_RenderFillRect(gRenderer, &heartRect);

        // 更新屏幕
        SDL_RenderPresent(gRenderer);
    }

    // 释放资源
    close();

    return 0;
}

bool init() {
    // 初始化SDL
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        printf("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
        return false;
    }

    // 创建窗口
    gWindow = SDL_CreateWindow("爱心动画", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
    if (gWindow == NULL) {
        printf("Window could not be created! SDL_Error: %s\n", SDL_GetError());
        return false;
    }

    // 创建渲染器
    gRenderer = SDL_CreateRenderer(gWindow, -1, SDL_RENDERER_ACCELERATED);
    if (gRenderer == NULL) {
        printf("Renderer could not be created! SDL Error: %s\n", SDL_GetError());
        return false;
    }

    // 设置渲染器颜色
    SDL_SetRenderDrawColor(gRenderer, 0xFF, 0xFF, 0xFF, 0xFF);

    return true;
}

bool loadMedia() {
    return true;
}

void close() {
    // 销毁渲染器
    SDL_DestroyRenderer(gRenderer);
    gRenderer = NULL;

    // 销毁窗口
    SDL_DestroyWindow(gWindow);
    gWindow = NULL;

    // 退出SDL
    SDL_Quit();
}

在这个程序中，我们通过SDL图形库实现了爱心的移动、大小变化和颜色变化。具体实现方法是，在循环中不断更新爱心的属性（位置、大小、颜色）并重新绘制爱心，然后在每次循环结束后更新屏幕以显示出动画效果。