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From: jb3o+@andrew.cmu.edu (Jon Allen Boone)
Newsgroups: comp.lang.c
Subject: Nested Macros
Message-ID: <gZO1Sce00W0JQ6AKEr@andrew.cmu.edu>
Date: 20 Nov 89 15:26:32 GMT
Organization: Class of '92, Carnegie Mellon, Pittsburgh, PA
Lines: 15

A friend is attempting to write a macro along the following lines:

#define DEBUG 1

#define DB(X) #ifdef (DEBUG) printf(X)

however, this results in an error when he attempts to compile it.

does anyone know how he would go about writing a macro that would
allow him to simply type DB(x) in his code and not have to type #ifdef
(DEBUG) printf(X) everywhere instead? Any help would be greatly
appreciated.  Please carbon copy your reply to pg0p@andrew.cmu.edu, as
well as to jb3o@andrew.cmu.edu and the board.

thank you...