From:	dontmailme AT iname DOT com (Steamer)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Which library is time in?
Date:	Wed, 05 Jul 2000 18:40:44 GMT
Organization:	always disorganized
Lines:	22
Message-ID:	<39638118.41303400@news.freeserve.net>
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 1000705190800 DOT 14785A-100000 AT is>
NNTP-Posting-Host:	modem-232.utah.dialup.pol.co.uk
X-Trace:	news7.svr.pol.co.uk 962822445 1878 62.137.95.232 (5 Jul 2000 18:40:45 GMT)
NNTP-Posting-Date:	5 Jul 2000 18:40:45 GMT
X-Complaints-To:	abuse AT theplanet DOT net
X-Newsreader:	Forte Free Agent 1.11/32.235
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Eli Zaretskii wrote:

> > > srand(time(NULL));
> > 
> > If the code is intended to be portable then it's probably better to do
> > 
> >     srand((unsigned)time(NULL));
> > 
> > to prevent warnings on some compilers.
> 
> What warning are those?  If you include both time.h and stdlib.h, you 
> should have no warnings, I think.

With DJGPP you won't get any warnings.  But I said "if the code is
intended to be portable".  For example, time_t might be unsigned long,
and unsigned long might be longer than unsigned int.  In this case the
compiler may warn that the conversion could lose significant digits.
But with the explicit cast it should assume you know what you're doing
and keep quiet.  (In fact I just tried this with Turbo C 3.0 and it
behaves exactly like this.)

S.

- Raw text -