enum, #define, const

For storing integers with bitwise operands inside their declaration, which should I use? Performance wise I think that an enumeration works slightly faster, however what's the standard?

>>7
No, but you still shouldn't. People should use the pre-processor as little as possible, because

   a) it changes the lexical structure of your program and
   b) if you have an error and you go into the debugger, debugging the replaced text will be more difficult (that is, if you used a macro function).