How Can I Get the Current Time and Date in C Cross-Platform?

Getting Current Time and Date in C Cross-Platform

The C standard library now provides a convenient and portable way to retrieve the current time and date through the std::chrono::system_clock class. Introduced in C 11, this class offers a system-independent interface for accessing high-resolution timing information.

Syntax:

auto now = std::chrono::system_clock::now();

The now() function returns a time_point object representing the current moment in time. Time points can be manipulated and compared to calculate elapsed time or retrieve specific date and time components.

Example:

#include <iostream>
#include <chrono>

int main() {
  auto now = std::chrono::system_clock::now();

  std::chrono::duration<double> elapsed_seconds = now - std::chrono::system_clock::now();

  std::cout << "Current time: " << std::ctime(&now) << std::endl;
  std::cout << "Elapsed seconds: " << elapsed_seconds.count() << std::endl;
}

This example prints output similar to:

Current time: Mon Oct  2 00:59:08 2017
Elapsed seconds: 0.000372

Additionally, std::chrono provides utility functions to extract specific date and time components, such as:

• std::get(now) for seconds
• std::get(now) for minutes
• std::get(now) for hours
• std::get(now) for day of month
• std::get(now) for month

By combining std::chrono with C standard library functions, you have a comprehensive cross-platform solution for handling date and time operations in your C applications.

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