Can a C macro definition refer to other macros?

Question

What I\'m trying to figure out is if something such as this (written in C):

#define FOO 15
#define BAR 23
#define MEH (FOO / BAR)
         


        

Answer 1

Yes, that is supported. And used quite a lot!

One important thing to note though is to make sure you paranthesize the expression otherwise you might run into nasty issues!

#define MEH FOO/BAR

// vs

#define MEH (FOO / BAR)

// the first could be expanded in an expression like 5 * MEH to mean something 
//   completely different than the second