Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!linus!philabs!mcnc!ncsu!uvacs!edison!steinmetz!davidsen
From: davidsen@steinmetz.UUCP (Davidsen)
Newsgroups: net.lang.c
Subject: Re: Boolean Operators Slighted in C
Message-ID: <732@steinmetz.UUCP>
Date: Fri, 9-May-86 15:59:39 EDT
Article-I.D.: steinmet.732
Posted: Fri May  9 15:59:39 1986
Date-Received: Mon, 12-May-86 00:18:08 EDT
References: <838@ihwpt.UUCP> <778@bentley.UUCP> <210@sdchema.sdchem.UUCP>
Reply-To: davidsen@kbsvax.UUCP (Davidsen)
Organization: GE CRD, Schenectady, NY
Lines: 33

In article <210@sdchema.sdchem.UUCP> tps@sdchema.UUCP (Tom Stockfisch) writes:
>In article <778@bentley.UUCP> kwh@bentley.UUCP writes:
>>In article <838@ihwpt.UUCP> ihwpt!knudsen writes:
>>>(2) There isn't any ^^ (XOR) operator either, as in
>>
>>There is, but it's spelled "!=".  (Presumably more efficient than "^", though
>>I think either one should work with a smart compiler.)
>>
>
>Not quite the same.
>	3 ^^ 4
>would evaluate as 0,
>	3 != 4
>evaluates as 1.
>
>-- Tom Stockfisch, UCSD Chemistry


XOR can be defined as an (ugly) macro, I believe.

#define XOR(a,b) (((a) != 0) != ((b) != 0)
/* or if you like small better than readable */
#define XOR(a,b) (!!(a) != !!(b))
-- 
	-bill davidsen

	seismo!rochester!steinmetz!--\
       /                               \
ihnp4!              unirot ------------->---> crdos1!davidsen
       \                               /
        chinet! ---------------------/        (davidsen@ge-crd.ARPA)

"Stupidity, like virtue, is its own reward"