C macro: #if check for equality

Question

Is there a way to do check for numerical equality in macros?

I want to do something like

#define choice 3

#if choice == 3
  ....
#endif

#if choice          


        

Answer 1

Indeed that should work. See http://gcc.gnu.org/onlinedocs/cpp/If.html#If

That reference is accurate, but written in "standards format":  abstractly without examples.