Learning how modules work

Before C++20, there was only one way of structuring a program in parts: through the #include directive (which is resolved by the precompiler). The latest standard added another and more modern way of achieving the same result, called module. This recipe will show you how to write code using modules and the differences between #include and module.

How to do it...

In this section, we'll write a program composed of two modules. This program is an improvement of the one we developed in the Learning how Range works recipe. We'll encapsulate the temperature code in a module and use it in a client module. Let's get started:

1. Let's create a new .cpp source file called temperature...