On Nov 15, 2007 3:42 PM, debasish deka <[EMAIL PROTECTED]> wrote:
> #define P 1 or 2 etc
> so that while writing the associated handlers I can just write COM##P which
> would be understood by the preprocessor as COM1 or COM2 etc. and implemented
> accordingly in the program. So thats all. Instead of modifying at many
> parts of the program we just change the number 'n'.
#define MKPORT (P) COM##P
so MKPORT(1) will get replaced with COM1
COM1 should be either another macro (which will require a re-scan of
the preprocessor when compiling) or a valid identifier (variable or
constant).
I don't think the token pasting operator can be used outside of a
macro definition, i.e.,
switch(com) {
case COM##P: ...
}
-- Brett
------------------------------------------------------------
"In the rhythm of music a secret is hidden;
If I were to divulge it, it would overturn the world."
-- Jelaleddin Rumi
