On Thursday 28 February 2002 08:35, Cal Evans wrote:
> Hm...you may be on to something. If you run this code you will see that
> about 30% of the time $ns1 IS actually 1. the funny thing is that if you
> remove the doubleval calls, $ns1 purports to have a value > than 1.
>
> Interesting...
> srand ((double) microtime() * 100);
> Income statement
> $ns1 = doubleval(number_format(rand(900,1200)*1000)) ;
> $cogs1 = doubleval(number_format(rand(450,600)*1000)) ;
> $gm1 = doubleval(number_format (($ns1 - $cogs1) * 1000));
> echo '1:'.$ns1."\n";
> echo '2:'.$cogs1."\n";
> echo '3:'.$gm1."\n";
> ?>
>
It is supposed to always have a value > 1. If it did what it was supposed
to, it would always have a value between 900,000 and 1,200,000. In the
original code, it does. What I can't figure out is why, even though there is
a value > 1 for $ns1, about 70% of the time, it thinks that value is one for
the calculation of $gm1.
> *
> * Cal Evans
> * Journeyman Programmer
> * Techno-Mage
> * http://www.calevans.com
> *
>
>
> -Original Message-
> From: Roy Cabaniss [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, February 28, 2002 8:17 AM
> To: [EMAIL PROTECTED]
> Subject: [PHP] arithmatic operation inconsistant
>
>
> I have a very simple php page which I am creating an accounting tutorial
> from. I am writing all of the equations on an include file and then
> calling
> the file at the beginning of the appropriate pages
>
> My problems lie in inconsistant arithmatic operations. For some reason the
> equation for $gm1 does not always act as though $ns1 has a value. Only
> about
> 30% of the time does $gm1 give the number I expect to see. The rest of the
> time what I get is a negative (-$cogs1 +1). As if you had taken 1 and
> subtracted $cogs1. All help MUCH appreciated.
>
>
> srand ((double) microtime() * 100);
> Income statement
> $ns1=number_format(rand(900,1200)*1000) ;
> $cogs1=number_format(rand(450,600)*1000) ;
> $gm1=number_format (($ns1 - $cogs1) * 1000);
>
>
>
>
>
> Dr. Roy F. Cabaniss
> Associate Professor of Business
> University of Arkansas Monticello
> http://cabanisspc.uamont.edu/~rcaban
>
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--
Dr. Roy F. Cabaniss
Associate Professor of Business
University of Arkansas Monticello
http://cabanisspc.uamont.edu/~rcaban
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