CODEWITHSUNDEEP
c++datetimec++11c++17c++-chrono
user14148022
user14148022

Reputation:

Is there any date-time module in c++

Is there any date time module in c++?
I researched a bit in google and came to know about <ctime> header file but it just went above my head.

Any other thing that can do my work?

Upvotes: 3

Views: 1787

Answers (1)

einpoklum
einpoklum

Reputation: 131525

In the C++ standard: <chrono>

C++11

Starting with C++11, the standard library contains date & time utilities, available in the <chrono> header, with constructs within the std::chrono namespace.

Among these you will find:

  • Clocks
  • Time points
  • Durations
  • A flexible mechanism for parsing date & time values from strings

the library is heavily templated, so that you can use a type of your choice for the raw representation (even floating-point types), and set your own resolution.

Example of use: How to get current time and date in C++?

Note that std::chrono facilities are somewhat-compatible with the old <ctime> header types. For example, the "system clock" class has methods for converting to and from the <ctime> time representation, time_t. This will be useful to you if you're combining C and C++ code, or need to expose a C interface somewhere; otherwise - try avoiding <ctime>-based code.

C++20

The new standard version approved in 2020 added:

  • Time zones
  • Calendars
  • More Duration types
  • More time point types
  • More clocks

Beyond the standard: Howard Hinnant's Date libraries

As commenters @AndyG and @doug suggest, Howard Hinnant is the "C++ date&time guy", and much of his work has actually gone into the standard - but not all of it.

Howard maintains a library/set-of-libraries of his own, named "Date".

It is based on C++11 <chrono>, but its changes are not exactly what's been added in C++20; so especially useful if you're using C++17 or earlier. It adds:

  • Timezones
  • Calendars, including Julian and Islamic
  • More Duration types
  • More time point types
  • Weeks

I'm assuming that eventually, all the good stuff from here will get standardized, but that hasn't happened yet.

Upvotes: 7

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