【C++ 入门】Mojave 风格随时间变化的壁纸

源码

#include<iostream>

#include<thread>
#include<chrono>

#include<direct.h>

#include<map>

#include<Windows.h>
#pragma comment(lib, "user32.lib")

using namespace std;


int main() {

  // constants
  char cwd[0xff];
  getcwd(cwd, 0xff);

  const pair<unsigned short, char> hourMap[] {
    {20, '2'}, {19, '8'}, 
    {18, '1'}, {16, '7'}, 
    {13, '6'}, {10, '5'}, 
    {8 , '4'}, {5 , '3'}, 
    {0 , '2'}
  };


  // variables
  SYSTEMTIME time;
  unsigned short hour{0};
  char cImgId{'2'};
  char cLastImgId{'0'};


  // main
  thread t([&]() {while(true) {

    // 计算现在小时数对应的图片
    GetLocalTime(&time);
    hour = time.wHour;
    for(const auto& kv: hourMap){ if(hour>=kv.first) {

      cImgId = kv.second;
      break;

    }}

    // 如果图片序号变化就改变壁纸
    if(cImgId!=cLastImgId) {

      string str = string(cwd) + "\\res\\Catalina_" + cImgId + ".jpg";
      SystemParametersInfoA(SPI_SETDESKWALLPAPER, 0, (PVOID)str.c_str(), SPIF_SENDCHANGE);
      cLastImgId = cImgId;

    }

    // 刷新频率
    this_thread::sleep_for(chrono::minutes(10));

  }});

  t.join();

  return 0;

}

壁纸结构