Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!uunet!mcvax!hp4nl!botter!star.cs.vu.nl!maart
From: maart@cs.vu.nl (Maarten Litmaath)
Newsgroups: comp.lang.c
Subject: Re: The Dangers of sizeof
Keywords: sizeof
Message-ID: <2273@kappl.cs.vu.nl>
Date: 10 Apr 89 18:17:08 GMT
References: <9969@smoke.BRL.MIL> <3.UUL1.3#5109@pantor.UUCP> <105@servio.UUCP>
Organization: V.U. Informatica, Amsterdam, the Netherlands
Lines: 29

penneyj@servio.UUCP (D. Jason Penney) writes:
\...
\I must disagree!  There is only ONE form of sizeof -- the operator form,
\which takes an arbitrary (unevaluated) expression as its argument.

K&R seem to disagree.

\...  Trick question:  what is the value of:
\
\sizeof (char) - 1
\
\Answer:  1 -- the (char) is a cast, which is of higher precedence than
\sizeof, [...]

sizeof and casts have equal precedence.

	% cat c.c
	main()
	{
		printf("%d\n", sizeof(char) - 1);
	}
	% a.out
	0
	%

People, please CHECK things before posting.
-- 
 "If it isn't aesthetically pleasing, |Maarten Litmaath @ VU Amsterdam:
  it's probably wrong." (jim@bilpin). |maart@cs.vu.nl, mcvax!botter!maart