Modern C++ for Absolute Beginners: A Friendly Introduction to C++ Programming Language and C++11 to C++20 Standards

© Slobodan Dmitrović 2020

S. DmitrovićModern C++ for Absolute Beginnershttps://doi.org/10.1007/978-1-4842-6047-0_31

31. Organizing code

Slobodan Dmitrović¹ 

(1)

Belgrade, Serbia

 

We can split our C++ code into multiple files. By convention, there are two kinds of files into which we can store our C++ source: header files (headers) and source files.

31.1 Header and Source Files

Header files are source code files where we usually put various declarations. Header files usually have the .h (or .hpp) extension. Source files are files where we can store our definitions and the main program. They usually have the .cpp (or .cc) extension.

Then we include the header files into our source files using the #include preprocessor directive. To include a standard library ...