Date: 18 Feb 1997 06:28:01 -0600 From: Zach Heilig <zach@blizzard.gaffaneys.com> To: John-Mark Gurney <gurney_j@resnet.uoregon.edu> Cc: Peter Mutsaers <plm@xs4all.nl>, freebsd-bugs@freefall.freebsd.org Subject: Re: bin/2752: NULL is used instead of 0 many places Message-ID: <87bu9ib8oe.fsf@murkwood.gaffaneys.com> In-Reply-To: John-Mark Gurney's message of Tue, 18 Feb 1997 00:14:59 -0800 (PST) References: <Pine.BSF.3.95q.970218001257.18336B-100000@hydrogen.nike.efn.org>
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John-Mark Gurney <jmg@nike.efn.org> writes:
> yes... but he's talking about this:
> char a = '\0';
> this way the compiler KNOWS it's a char... and that it's the nul
> char... and doesn't convert the int 0 to char 0...
But, it doesn't know that '\0' is a 'char', since it really is an
'int'. The only real reason to use '\0' instead of a plain 0 is
stylistic only. ANSI C does not have character constants, though C++
does. Check out this small program:
#include <stdio.h>
int
main(void)
{
printf("sizeof (char) is: %d\n", (int) sizeof (char));
printf("sizeof '\\0' is: %d\n", (int) sizeof '\0');
printf("sizeof (int) is: %d\n", (int) sizeof (int));
return 0;
}
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