Modern C for Absolute Beginners: A Friendly Introduction to the C Programming Language

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2024

S. DmitrovićModern C for Absolute Beginnershttps://doi.org/10.1007/979-8-8688-0224-9_31

31. Header and Source Files

Slobodan Dmitrović¹  

(1)

Belgrade, Serbia

 

Our C source code can be divided into multiple files called header files and source files. These files are plain text files containing C source code. By convention, the header files have the .h extension, and source files have the .c extension. Other extensions are also possible.

Standard-library header files are included by surrounding the header name with angle brackets <> as in:

#include <stdio.h>

And user-defined header files are included by surrounding the header file name with double quotes:

#include ...