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From: pett@socrates.ucsf.edu.UUCP
Newsgroups: comp.sys.atari.st
Subject: Re: "file selector" blues, Megamax bug
Message-ID: <10163@cgl.ucsf.EDU>
Date: Mon, 13-Apr-87 18:01:52 EST
Article-I.D.: cgl.10163
Posted: Mon Apr 13 18:01:52 1987
Date-Received: Wed, 15-Apr-87 02:58:24 EST
References: <639@batcomputer.tn.cornell.edu> <821@viper.UUCP>
Sender: daemon@cgl.ucsf.edu
Reply-To: pett@socrates.ucsf.edu.UUCP (Eric F. Pettersen)
Organization: UCSF Computer Graphics Lab
Lines: 32
Keywords: user-friendly C sizeof

In article <821@viper.UUCP> john@viper.UUCP (John Stanley) writes:
>In article <639@batcomputer.tn.cornell.edu>
> braner@tcgould.tn.cornell.edu.UUCP (braner) writes:
> >Yet another bug in Megamax C:
> >
> >	sizeof("a string constant") always yields 4.
> >
> >	(sizeof(s) where s is of type array-of-char works fine.)
> >
> >- Moshe Braner
>
>  As I mentioned before...  This is infact the right way for sizeof to
>work.  ...

What???  I find it difficult to believe this is a subject for argument!
A string constant is a character ARRAY and therefore sizeof returns the
storage taken by the string constant.  If you have an array: int foo[10][10],
sizeof(foo) will return 100 * sizeof(int) despite the fact that foo is a
pointer.  If you don't believe me just run the following program on your
MAINFRAME yourself.

#include	<stdio.h>

main()
{
	printf("sizeof(\"abcdef\") = %d\n", sizeof("abcdef"));
}

This will return 7.

				Eric Pettersen
				pett@cgl.ucsf.edu or ucbvax!ucsfcgl!pett