Another unavoidable use of macros is to convert symbolic names into string literals or to enable warnings for printf wrappers in a portable code. As for includ

Another unavoidable use of macros is to convert symbolic names into string literals or to enable warnings for printf wrappers in a portable code. As for include guards one has to look really hard [1] to get a compiler that does not support #pragma once. [1] - https://en.wikipedia.org/wiki/Pragma_once#Portability https://en.wikipedia.org/wiki/Pragma_once#Portability