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From: smk@cbnews.ATT.COM (Stephen M. Kennedy)
Newsgroups: comp.lang.c
Subject: Re: This one bit me today
Message-ID: <9999@cbnews.ATT.COM>
Date: 6 Oct 89 13:23:22 GMT
References: <832@crdos1.crd.ge.COM>
Reply-To: smk@cbnews.ATT.COM (Stephen M. Kennedy,59443,cb,1K232,6148607133)
Organization: AT&T Bell Laboratories
Lines: 15

In article <832@crdos1.crd.ge.COM> davidsen@crdos1.UUCP (bill davidsen) writes:
>  This is a good example, and I thank you. I have added something
>similar to my list of things to think about in the pointers section of
>my C course notes.
>  It pops up in macros from time to time. Consider:
>	#define xavg(m) (sum+3)/m
Why did you put this in the pointers section?  This is just a poorly
parenthesized macro.  Consider "y = 1 / xavag(10);" or "xavg(n * 10)".

p.s. In another article, did someone say it was ok to define an abs macro as
     -(x)?  What about "y = -abs(x);"?
---
Steve Kennedy
att!cbosgd!smk
"I love you, Kate"