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Oct 25, 2011 · Once you have retrieved that folder, add it to the folder that your project file is in. At the top of the C++ file that you are coding in, add the include statement #include "date/date.h". Then add using date::operations<<;. After this, you should be able to use std::cout exactly as you would expect.
The <chrono> library only deals with time and not dates, except for the system_clock which has the ability to convert its timepoints to time_t. So using <chrono> for dates will not improve things much. Hopefully we get something like chrono::date in the not too distant future. That said, you can use <chrono> in the following way:
Jan 18, 2013 · @rhalbersma: Use of auto would be fine for d, as the result of the duration_cast<ms> is ms.However for fs auto would not be appropriate because the result of t1-t0 has type high_resolution_clock::duration which is not necessarily the same type as duration<float>.
Apr 20, 2016 · using ms = std::chrono::milliseconds; To start, you're going to need a duration with a representation of float and the units of seconds. This is how you do that: using float_sec = std::chrono::duration<float>; Next you need a time_point which uses Time as the clock, and float_sec as its duration: using float_time_point = std::chrono::time_point ...
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If you have time points with a higher precision (e.g. nanoseconds) and you want to preserve all digits without truncating, but you want to convert to milliseconds, you can use duration_cast<duration<float,std::milli>(difference).count(). Using duration_cast<milliseconds>(duration).count() will truncate your digits since milliseconds is ...
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Apr 22, 2015 · There is a de-facto (unofficial) standard that std::chrono::system_clock::time_point has an epoch consistent with Unix Time. This is defined as the time duration that has elapsed since 00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970, not counting leap seconds. Fwiw, here is a date/time library which takes advantage of this ...
Sep 12, 2014 · An updated answer for C++11: Use the sleep_for and sleep_until functions: using namespace std::this_thread; // sleep_for, sleep_until. using namespace std::chrono; // nanoseconds, system_clock, seconds. sleep_for(nanoseconds(10)); sleep_until(system_clock::now() + seconds(1)); With these functions there's no longer a need to continually add new ...
Jan 11, 2018 · This is the value that that my operating system reports. With std::chrono according to the docs the minimum representable duration is high_resolution_clock::period::num / high_resolution_clock::period::den. The num and den are numerator and denominator. std::chrono::high_resolution_clock tells me the numerator is 1, and the denominator is 1 ...
