7.3. Additional Class Features
The Sales_data class is pretty simple, yet it allowed us to explore quite a bit of the language support for classes. In this section, we’ll cover some additional class-related features that Sales_data doesn’t need to use. These features include type members, in-class initializers for members of class type, mutable data members, inline member functions, returning *this from a member function, more about how we define and use class types, and class friendship.
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