Path: utzoo!utgpu!water!watmath!clyde!burl!codas!ufcsv!gatech!bbn!bbn.com!rsalz
From: rsalz@bbn.com (Rich Salz)
Newsgroups: comp.lang.c
Subject: Re: "logical" xor
Summary: A relop B returns 0 or 1
Message-ID: <295@fig.bbn.com>
Date: 14 Jan 88 01:00:49 GMT
References: <2946@zeus.TEK.COM> <170@illusion.UUCP> <39a83409.ae48@apollo.uucp>
Organization: BBN Laboratories, Cambridge MA
Lines: 23

>Not even true yet.  All (a != 0) is guaranteed to generate (if a is
>not 0) is a non-zero value ...
Nope.  8/3/87 draft, page 43, lines 43-45
	Each of the operators [ < > >= ] shall yield 1 if the specified
	relation is true and 0 if it is false.
...page 44, lines 15-16
	[ == and != ] are analogous to the relational operators except
	for their lower precedence.
K&R, in the first sentence of the last paragraph on page 189 and in the
first paragraph of page 190 say almost the exact same thing.

In short, doing thinks like
	#define TRUE	(1 == 1)
	#define FALSE	(1 == 0)

	if ((a == b) == TRUE) ...

Is silly, and often a sign that the writer is confusing the interpretation
within conditionals with the result of relationals. :-)

	/r$
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