Is it reasonable to use enums instead of #defines for compile-time constants in C?

Question

I\'m coming back to some C development after working in C++ for a while. I\'ve gotten it into my head that macros should be avoided when not necessary in favor of making the com

Answer 1

A const int MY_CONSTANT = 7; will take up storage; an enum or #define does not.

With a #define you can use any (integer) value, for example #define IO_PORT 0xb3

With an enum you let the compiler assign the numbers, which can be a lot easier if the values don't matter that much:

enum {
   MENU_CHOICE_START = 1,
   MENU_CHOICE_NEXT,
   ...
};