Example 2: using a class pattern

In the previous example, we deliberately avoided using standard components.

However, if we're only interested in the class's functionalities, apart from output on a stream, these are provided in full by the standard set component (its use requires the inclusion of the set header file). There are several approaches to output on a stream. You can, of course, program it as and when required, each time writing a few instructions for traversing the :

It can also be used as an ordinary function, as in this example, similar...