Is it possible for C preprocessor macros to contain preprocessor directives?

Question

I would like to do the equivalent of the following:

#define print_max(TYPE) \\
#  ifdef TYPE##_MAX \\
     printf(\"%lld\\n\", TYPE##_MAX); \\
#  endif

prin         


        

Answer 1

I don't think it's a case of the ## operator not being allowed in an #ifdef. I tried this:

#define _print_max(TYPE) \
#ifdef TYPE \
printf("%lld\n", _TYPE); \
#endif

#define print_max(TYPE) _print_max(MAX##_TYPE)


void main() 
{
    print_max(INT)
}

and it still didn't work (it didn't like #ifdef TYPE). The problem is that #ifdef will only accept #defined symbols, not #define arguments. Those are two different things.