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

Acquiring the Current Time and Date in C : A Cross-Platform Approach

Obtaining the current date and time is a common task in various programming scenarios. C offers a cross-platform solution through the C 11 standard, enabling developers to retrieve this information consistently across different operating systems.

Solution Using std::chrono::system_clock::now()

The std::chrono library, introduced in C 11, provides a standardized interface for working with time and dates. The function std::chrono::system_clock::now() returns a system_clock object representing the current system time.

Example Implementation

Below is an example code snippet demonstrating how to use std::chrono::system_clock::now():

#include <iostream>
#include <chrono>
#include <ctime>

int main()
{
    auto start = std::chrono::system_clock::now();
    // Some computation here
    auto end = std::chrono::system_clock::now();

    std::chrono::duration<double> elapsed_seconds = end - start;
    std::time_t end_time = std::chrono::system_clock::to_time_t(end);

    std::cout << "finished computation at " << std::ctime(&end_time)
              << "elapsed time: " << elapsed_seconds.count() << "s"
              << std::endl;
    return 0;
}

When you run this code, it will print the current time, followed by the duration of any computations performed between the start and end time measurements.

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