限制跟随鼠标移动物体坐标的C#具体代码

限制跟随鼠标移动物体坐标的C代码如下：

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

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

// 初始化SDL窗口、渲染器、事件等
bool init();

// 加载媒体文件
bool loadMedia();

// 退出程序
void close();

// SDL窗口、渲染器、事件
SDL_Window* gWindow = NULL;
SDL_Renderer* gRenderer = NULL;
SDL_Event gEvent;

// 程序入口函数
int main(int argc, char* args[]) {
    // 初始化SDL
    if (!init()) {
        printf("Failed to initialize!\n");
        return -1;
    }

    // 加载媒体
    if (!loadMedia()) {
        printf("Failed to load media!\n");
        return -1;
    }

    // 指定物体起始位置
    int x = SCREEN_WIDTH / 2 - 50;
    int y = SCREEN_HEIGHT / 2 - 50;

    // 物体宽高
    const int OBJECT_WIDTH = 100;
    const int OBJECT_HEIGHT = 100;

    // 事件循环标志
    bool quit = false;

    while (!quit) {
        // 处理事件
        while (SDL_PollEvent(&gEvent) != 0) {
            // 窗口关闭事件
            if (gEvent.type == SDL_QUIT) {
                quit = true;
            }
        }

        // 获取鼠标位置
        int mouseX, mouseY;
        SDL_GetMouseState(&mouseX, &mouseY);

        // 如果鼠标位置超出边界，修正坐标
        if (mouseX < OBJECT_WIDTH / 2) {
            mouseX = OBJECT_WIDTH / 2;
        } else if (mouseX > SCREEN_WIDTH - OBJECT_WIDTH / 2) {
            mouseX = SCREEN_WIDTH - OBJECT_WIDTH / 2;
        }
        if (mouseY < OBJECT_HEIGHT / 2) {
            mouseY = OBJECT_HEIGHT / 2;
        } else if (mouseY > SCREEN_HEIGHT - OBJECT_HEIGHT / 2) {
            mouseY = SCREEN_HEIGHT - OBJECT_HEIGHT / 2;
        }

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

        // 渲染物体
        SDL_Rect objectRect = {mouseX - OBJECT_WIDTH / 2, mouseY - OBJECT_HEIGHT / 2, OBJECT_WIDTH, OBJECT_HEIGHT};
        SDL_SetRenderDrawColor(gRenderer, 0x00, 0x00, 0xFF, 0xFF);
        SDL_RenderFillRect(gRenderer, &objectRect);

        // 更新屏幕
        SDL_RenderPresent(gRenderer);
    }

    // 退出程序
    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("SDL Tutorial",
                               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() {
    // 销毁窗口、渲染器
    SDL_DestroyRenderer(gRenderer);
    SDL_DestroyWindow(gWindow);
    gWindow = NULL;
    gRenderer = NULL;

    // 退出SDL
    SDL_Quit();
}

这段代码实现了一个简单的窗口程序，能够显示一个正方形，并响应鼠标移动事件。在鼠标移动时，程序会更新正方形的位置，但是会限制正方形的位置不超出窗口边界。