std :: put_time格式 [英] std::put_time formats

问题描述

我想了解如何使用std :: put_time，以及如何以YYYY / MM / DD HH：MM：SS格式获取日期戳。现在我写这样的东西：

  std :: chrono :: time_point< std :: chrono :: system_clock> now = std :: chrono :: system_clock :: now（）; 
 std :: time_t now_c = std :: chrono :: system_clock :: to_time_t（now  -  std :: chrono :: hours（24））; 
 std :: cout<< std :: put_time（std :: localtime（& now_c），％F％T）< '\\\
'; 
  

并输出为2011-10-25 12:00:08，如何获取日期正在提及的1小时前 stackoverflow.com/a/12346532/777186\">在这里，cppreference有很好的文档： http://en.cppreference.com/w/cpp/io/manip/put_time

具体来说，您可以使用以下方式获取您所述的格式格式字符串：

  std :: cout< std :: put_time（std :: localtime（& now_c），％Y /％m /％d％T）
  

I want understand how to work std::put_time, and how can I get date stamp in "YYYY/MM/DD HH:MM:SS" format. Now I write somthing like this:

std::chrono::time_point<std::chrono::system_clock> now = std::chrono::system_clock::now();
        std::time_t now_c = std::chrono::system_clock::to_time_t(now - std::chrono::hours(24));
        std::cout  << std::put_time(std::localtime(&now_c), "%F %T") << '\n';

and output is 2011-10-25 12:00:08, how can I get the date as 2011/10/25 12:00:08.

解决方案

As mentioned 1 hour ago here, cppreference has good documentation on this: http://en.cppreference.com/w/cpp/io/manip/put_time

Specifically, you can get the format you described using the following format string:

std::cout  << std::put_time(std::localtime(&now_c), "%Y/%m/%d %T")

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