Creating constants like enum constants with a macro

[rtoe]

I'd like to have a macro to call which increments an ID. This ID is a constant, being incremented each time it is called.

Obviously, the following does not work:
#define ID 0 // initially
.. then
#define ID ID+1 // whenever I need a new ID generated.

Is there a trick, potentially with multiple macros to solve this seemingly trivial problem?

thx!

 

[Salem]

Answered already at about.com


--
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.