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then i think #define is better way to write.
because it process by prepocessor and preprocessor put its value to all palces before any complition.
so at run time there is no need to substituting varible value.
i think my answer clarify u deference and help u.
There should be no difference between the variable and the enum in performance IN SOME CASES (see below for how to optimize your code), unless you are doing things with pointers that the compiler does not understand:
const int x = 5;
int* p = (int*)&x; // you shouldn't do this anyway.
The compiler will panic and not to optimizations when you pull this kind of mischief.
Merely declaring them const means that they don't change in the program. inlining them shows the compiler that in fact, they are constants and can be folded.
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