Modern C++ Programming Cookbook

How it works...

The std::chrono::duration class defines a number of ticks (the increment between two moments in time) over a unit of time. The default unit is the second, and for expressing other units, such as minutes or milliseconds, we need to use a ratio. For units greater than the second, the ratio is greater than one, such as ratio<60> for minutes. For units smaller than the second, the ratio is smaller than one, such as ratio<1, 1000> for milliseconds. The number of ticks can be retrieved with the count() member function.

The standard library defines several type synonyms for durations of nanoseconds, microseconds, milliseconds, seconds, minutes, and hours that we used in the first example in the previous section. The following code ...