Any fundamental difference between source and header files in C?

Question

I don\'t quite understand how things should be separated in C\'s source and header files. I often see many projects with two sets of files with the same name (sans the exten

Answer 1

Usually, header files contain declarations, source files contain code.

So, if in source file A.c you need a function implemented in source file B.c, you just include B.h to have its declaration.