On Thursday 28 February 2002 08:35, Cal Evans wrote: > Hmmmmm...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... > <?PHP > srand ((double) microtime() * 1000000); > #### 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() * 1000000); > #### 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 > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- Dr. Roy F. Cabaniss Associate Professor of Business University of Arkansas Monticello http://cabanisspc.uamont.edu/~rcaban -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
