Path: utzoo!utgpu!water!watmath!clyde!att!pacbell!ames!umd5!mimsy!oddjob!kaon!arthur!paul
From: paul@arthur.uchicago.edu (Paul Burchard)
Newsgroups: comp.lang.c
Subject: Re: Unnecessary Parenthesis
Keywords: Use 'em all the time in macros...
Message-ID: <441@kaon.uchicago.edu>
Date: 21 Jul 88 13:06:09 GMT
References: <2089@ssc-vax.UUCP>
Sender: root@kaon.uchicago.edu
Reply-To: paul@zaphod.UChicago.Edu (Paul Burchard)
Organization: Dept. of Mathematics, Univ. of Chicago
Lines: 30

In article <2089@ssc-vax.UUCP> dmg@ssc-vax.UUCP (David Geary) writes:
>"Unnecessary" parenthesis are something I use all the time in macro
>definitions, also.  Consider:
>
>#define Square(x)  x*x
>#define GetNextChar(c)  c = getchar()
>
  [...]
>The above two macros should have been written like:
>
>#define Square(x)       (x)*(x)
>#define GetNextChar(c)  (c = getchar())
>
  [...]
>~ David Geary, Boeing Aerospace,               ~ 
>~ Seattle - "THE DRIZZLE CAPITAL OF THE WORLD" ~


Actually, they should have been written like

	#define Square(x)       ((x)*(x))
	#define GetNextChar(c)  ((c) = getchar())

I trust you can imagine code that requires these further parens.


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Paul Burchard	paul@zaphod.UChicago.Edu
enum Chicago_weather { roast, freeze, steam, dry, simmer } today;
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