Xref:	news2.mv.net comp.os.msdos.djgpp:4632
From:	Thomas Demmer <demmer AT LSTM DOT Ruhr-UNI-Bochum DOT De>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Why doesnt this work!
Date:	Wed, 05 Jun 1996 11:31:18 +0100
Organization:	Lehrstuhl fuer Stroemungsmechanik
Lines:	36
Message-ID:	<31B561F6.59E2@LSTM.Ruhr-UNI-Bochum.De>
References:	<4p5btk$5ic AT news DOT cybermax DOT net>
NNTP-Posting-Host:	bvb.lstm.ruhr-uni-bochum.de
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

blah  (what a nick name...) wrote:
> 
> Can anyone tell me why this code doesnt work in djgpp.
> 
[...]
>    printf("The time was: %f\n", (end - start) / CLK_TCK);
[...]
> 
> When i run this after compiling in gcc it always prints 0.00000!
> I compiled it with  ->   gcc timer.c -otimer.exe
> When i compile in borland c 3.1 or microsoft c 1.0 it works fine and give the
> expected result(some floating point number - about 2.?????)

Well, you have only int operands, and the compiler sees no point why he
should change the expression to a float. So, you're giving printf an int
to print, not a float (double, actually). Just say something like
(end -start) / (float ) CLK_TCK

And remember: C isn't Pascal, there is no DIV, but / has a double meaning.
A mistake I made myself often enough....
-- 
Ciao
Tom



*************************************************************
* Thomas Demmer                                             *
* Lehrstuhl fuer Stroemungsmechanik                         *
* Ruhr-Uni-Bochum                                           *
* Universitaetsstr. 150                                     *
* D-44780  Bochum                                           *
* Tel: +49 234 700 6434                                     *
* Fax: +49 234 709 4162                                     *
* http://www.lstm.ruhr-uni-bochum.de/~demmer                *
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