Xref: utzoo comp.arch:4950 comp.lang.c:10339
Path: utzoo!attcan!uunet!husc6!bloom-beacon!tut.cis.ohio-state.edu!mailrus!ames!pasteur!ucbvax!unisoft!paul
From: paul@unisoft.UUCP (n)
Newsgroups: comp.arch,comp.lang.c
Subject: Re: negative addresses
Message-ID: <959@unisoft.UUCP>
Date: 23 May 88 15:02:49 GMT
References: <2393@uvacs.CS.VIRGINIA.EDU> <21541@amdcad.AMD.COM> <10001@tekecs.TEK.COM> <206@proxftl.UUCP>
Reply-To: paul@unisoft.UUCP (Paul Campbell)
Lines: 33

In article <206@proxftl.UUCP> bill@proxftl.UUCP (T. William Wells) writes:
>>
>>               if (tbuf->c_ptr == NULL)
>
>ANSI says that the two are equivalent.  Actually, ANSI says
>(about `if'): "...  the first substatement is executed if the
>expression compares unequal to 0.  ...".  This means that you can
>think of the statement `if (x)' as `if (x != 0)'.
>

Correct me if I'm wrong .....

			   if (x) ...

	really means 	   if (x != 0) ....
	which really means if ((x != 0) != 0) ...
	which really means if (((x != 0) != 0) != 0) ...
	which really means if ((((x != 0) != 0) != 0) != 0) ...

				etc etc


hence the need for all these new super optimising compilers .....


		Paul

	
-- 
Paul Campbell, UniSoft Corp. 6121 Hollis, Emeryville, Ca
	E-mail:		..!{ucbvax,hoptoad}!unisoft!paul  
Nothing here represents the opinions of UniSoft or its employees (except me)
"Nuclear war doesn't prove who's Right, just who's Left" (ABC news 10/13/87)