Path: utzoo!utgpu!water!watmath!clyde!bellcore!decvax!decwrl!labrea!agate!pasteur!ames!nrl-cmf!cmcl2!brl-adm!adm!jbaker@ee.UCLA.EDU
From: jbaker@ee.UCLA.EDU (Joe Baker)
Newsgroups: comp.lang.c
Subject: macros with parameters in MSC 5.0
Message-ID: <11879@brl-adm.ARPA>
Date: 18 Feb 88 00:30:53 GMT
Sender: news@brl-adm.ARPA
Lines: 37



I am a C neophyte and am looking for a solution to the following problem:

I am attempting to port the latest version of the public domain spreadsheet
calculator, sc 5.1, to an IBM PC.  I am using Microsoft C 5.0.  The
code uses the following macro to produce control characters for
comparison to input characters in case statements and the like:

#define ctl(c) ('c'&037)

This requires parameter substitution within a character constant, which
is not allowed in MSC5.0 (My reading of Kernighan & Ritchie pg. 207
seems to indicate that they don't allow it either.  However, the 
program compiles and runs on lots of systems.)

The Microsoft manual suggests use of the 'stringizing' operator, #,
but this produces a string literal instead of a character constant.

I have come up with some ugly fixes, but would like to know: what is
the Right Way to do this?

Thanks,


- Joe Baker, Dept. of Electrical Engineering
6731 Boelter Hall, UCLA, L.A., CA 90024 (213) 825-7079, 825-2327
ARPA: jbaker@ee.ucla.edu UUCP: {ihnp4|randvax|ucbvax}!ucla-cs!uclaee!jbaker

"Presumptions that the church should be trying to improve housing for the 
poor...that the church should be small and impoverished...are hidden 
presumptions that I see all the time.  Are _you_ housing the homeless in your 
home?  What's the Empire State Building doing to help the homeless...?  
Why should people just pick on the churches?  There's a fairness element here."
              - Pastor of the Fifth Avenue Presbyterian Church in NYC