Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!ginosko!uunet!virtech!cpcahil
From: cpcahil@virtech.UUCP (Conor P. Cahill)
Newsgroups: comp.lang.c
Subject: Re: This one bit me today
Message-ID: <1243@virtech.UUCP>
Date: 7 Oct 89 12:19:26 GMT
References: <2432@hub.UUCP> <832@crdos1.crd.ge.COM> <1067@polari.UUCP>
Organization: Virtual Technologies Inc
Lines: 17

In article <1067@polari.UUCP>, 6sigma@polari.UUCP (Brian Matthews) writes:
> 
> That's why anyone who knows what they're doing will parenthesize each
> argument in the expansion of the macro and use liberal whitespace, thusly:
> 
> #define xavg(m)	(sum + 3) / (m)

And they will also parenthesize the entire expression:

#define xavg(m)		((sum + 3) / (m))

to ensure that there are no problems with evaluation order.
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