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From: guy@gorodish.UUCP
Newsgroups: news.software.b,comp.lang.c
Subject: Re: News for Xenix on PC AT ?
Message-ID: <17438@sun.uucp>
Date: Mon, 27-Apr-87 14:36:47 EDT
Article-I.D.: sun.17438
Posted: Mon Apr 27 14:36:47 1987
Date-Received: Wed, 29-Apr-87 00:47:38 EDT
References: <18346@ucbvax.BERKELEY.EDU> <145@sds.UUCP> <17005@sun.uucp> <146@sds.UUCP> <17245@sun.uucp> <889@viper.UUCP>
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Reply-To: guy@sun.UUCP (Guy Harris)
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Xref: utgpu news.software.b:534 comp.lang.c:1860

> >  The C language lacks a token like Pascal's "nil", so a
> >constant expression with the value 0 must do double duty as a
> >representation of a null pointer.  
>
>  Wrong...  Ever hear of something called "NULL"?

Wrong... Ever hear of something called a "preprocessor"?  NULL is
*not* a token defined by the language's grammar.  It's a preprocessor
definition, so it ultimately has to expand to *something*, and the
only thing it can expand to is "0".