Introduction

Time handling in C++ can be tedious and tricky, but hopefully by the end of this blog post, you will understand how to handle time with various different methods. There are two different ways in which to handle time; using the std::chrono library from C++, or to use C-style date and time via std::time.

Time handling via std::chrono

Time handling in std::chrono is managed by 3 different parts.

Clocks

Objects that contain a starting point, which is usually the Unix epoch. The Unix epoch is considered the beginning of time for Unix computers and starts on the 1^st January, 1970. These clock objects also have a tick rate, which is usually set to 1 second. Time points

A duration of time since the epoch of a specified clock. Duration

Consists of a span of time which is made up a number of ticks of a given time unit.

Let me show you an example that uses clocks.

#include <iostream>
#include <chrono>

using namespace std::chrono;
int main(int argc, char** argv) {
    time_t a = system_clock().to_time_t(system_clock().now());
    std::cout << a << std::endl;
}

I have used a using directive here and in other examples as it will reduce typing. system_clock().now() returns

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