How Do I Get the Current Date and Time in C ?

How to Obtain the Current Time and Date in C

In C , there's a platform-independent approach to retrieving the current date and time:

std::chrono::system_clock::now()

Introduced in C 11, this function provides a portable method to access the system clock's current time. Here's an example adapted from en.cppreference.com:

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

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

This code will output a timestamp similar to:

Finished computation at Mon Oct  2 00:59:08 2017
Elapsed time: 1.88232s

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