Book Image

Modern C++ Programming Cookbook - Second Edition

By : Marius Bancila
5 (1)
Book Image

Modern C++ Programming Cookbook - Second Edition

5 (1)
By: Marius Bancila

Overview of this book

C++ has come a long way to be one of the most widely used general-purpose languages that is fast, efficient, and high-performance at its core. The updated second edition of Modern C++ Programming Cookbook addresses the latest features of C++20, such as modules, concepts, coroutines, and the many additions to the standard library, including ranges and text formatting. The book is organized in the form of practical recipes covering a wide range of problems faced by modern developers. The book also delves into the details of all the core concepts in modern C++ programming, such as functions and classes, iterators and algorithms, streams and the file system, threading and concurrency, smart pointers and move semantics, and many others. It goes into the performance aspects of programming in depth, teaching developers how to write fast and lean code with the help of best practices. Furthermore, the book explores useful patterns and delves into the implementation of many idioms, including pimpl, named parameter, and attorney-client, teaching techniques such as avoiding repetition with the factory pattern. There is also a chapter dedicated to unit testing, where you are introduced to three of the most widely used libraries for C++: Boost.Test, Google Test, and Catch2. By the end of the book, you will be able to effectively leverage the features and techniques of C++11/14/17/20 programming to enhance the performance, scalability, and efficiency of your applications.
Table of Contents (16 chapters)
13
Bibliography
14
Other Books You May Enjoy
15
Index

Expressing time intervals with chrono::duration

Working with times and dates is a common operation, regardless of the programming language. C++11 provides a flexible date and time library as part of the standard library that enables us to define time points and time intervals. This library, called chrono, is a general-purpose utility library designed to work with a timer and clocks that can be different on different systems and, therefore, be precision-neutral. The library is available in the <chrono> header in the std::chrono namespace and defines and implements several components, as follows:

  • Durations, which represent time intervals
  • Time points, which present a duration of time since the epoch of a clock
  • Clocks, which define an epoch (that is, start of time) and a tick

In this recipe, we will learn how to work with durations.

Getting ready

This recipe is not intended as a complete reference to the duration class. It is recommended...