C++: A Dialog Programming with the C++ Standard Library

Definitions

A class is a user-defined type.^[2]

^[2] Please note that the terms class and storage class have nothing to do with one another. This is another case where C++ reuses the same word for different concepts, although at least “storage class” isn't a keyword. We should be grateful for such small favors.

A class interface tells the compiler what facilities the class provides. This interface is usually found in a header file, which by convention has the extension .h.^[3]

^[3] At least, that is the convention for classes created by “normal” programmers, like you and me. The header files that define the classes in the C++ standard library have no extensions and in fact may not even be stored in normal files. An example is the <string> header file ...