C/C++11 – 获取系统当前时间 std::chrono::system_clock

简介

C++11中获取系统当前时间

个人使用

auto nowTime = chrono::system_clock::now();
auto tt = chrono::system_clock::to_time_t(nowTime);
std::cout << "[JcSmartDevice]::WaitDevLinked sInfo is true:" << ctime(&tt) << std::endl;

官方例子

// system_clock example
#include <iostream>
#include <ctime>
#include <ratio>
#include <chrono>

int main ()
{
  using std::chrono::system_clock;

  std::chrono::duration<int,std::ratio<60*60*24> > one_day (1);

  system_clock::time_point today = system_clock::now();
  system_clock::time_point tomorrow = today + one_day;

  std::time_t tt;

  tt = system_clock::to_time_t ( today );
  std::cout << "today is: " << ctime(&tt);

  tt = system_clock::to_time_t ( tomorrow );
  std::cout << "tomorrow will be: " << ctime(&tt);

  return 0;
}


//Output
today is: Wed May 30 12:25:03 2012
tomorrow will be: Thu May 31 12:25:03 2012

原文链接: https://www.cnblogs.com/citrus/p/16453367.html

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