Date: Thu, 13 Jan 2000 03:02:36 -0800 From: Alfred Perlstein <bright@wintelcom.net> To: "Alexey N. Dokuchaev" <danfe@ssc.nsu.ru> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: (void)printf(); (Was: Re: simple c i/o question) Message-ID: <20000113030235.Z9397@fw.wintelcom.net> In-Reply-To: <Pine.LNX.4.10.10001131328380.22433-100000@inet.ssc.nsu.ru>; from danfe@ssc.nsu.ru on Thu, Jan 13, 2000 at 01:28:57PM %2B0600 References: <Pine.LNX.4.10.10001131328380.22433-100000@inet.ssc.nsu.ru>
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* Alexey N. Dokuchaev <danfe@ssc.nsu.ru> [000112 23:54] wrote:
> On Wed, 12 Jan 2000, Naief BinTalal wrote:
>
> > On Wed, Jan 12, 2000 at 04:28:23PM +0000, Jonathon McKitrick wrote:
> > >
> > > I'm trying to write a hello world program. What is the output file for
> > > the console currently being displayed (in other words, the screen)?
> > > I've tried printf, and fprintf to stdout and stderr.
> >
> > #include <stdio.h>
> >
> > int
> > main(void)
> > {
> > (void)fprintf(stdout,"Hello World\n");
> > return 0;
> > }
> >
>
> While browsing thru the source code of almost anything in FreeBSD, I've
> noticed that (type)function(parameters); syntax. Why not just to write
> function(paramenters). Like in the prev example, what's wrong with simple
> printf(blahblah); but (void)printf(blahblah); ?
Nothing really, it's my preference to only use void when I mean:
"i know this function returns something that may be interesting, but frankly
I don't care at this point"
using it for things like printf is a bit much, but it sort of let's the
next guy know that you didn't miss something.
I also remember hearing that older compilers had an option to complain
about code that didn't do something with return values.
-Alfred
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