Interface (.hpp) versus implementation (.cpp) files (and why they exist) | Modern Cpp Series Ep. 36

Published: 07 March 2022
on channel: Mike Shah

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►Lesson Description: In this lesson I discuss the difference between an interface (.h, .hxx, or .hpp) file in c++ versus an implementation file (.cpp or .cxx). Header files (.hpp) give you a high level overview of the programming interface you have in the library. The implementation file (.cpp) however, provides the implementation (i.e. the actual details and algorithms to get work done).

In this lesson, we also discuss header guards (So you can include files safely), what happens when you include a file too many times (multiple definition error), and the purpose of why we separate our code (make project more easy to manage, and to speed up compilation).

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