#46566 [NEW]: wrong calculating
| From: | krumb at valentins dot de | Date: | Thu, 13 Nov 2008 13:36:34 +0000 |
| Subject: | #46566 [NEW]: wrong calculating | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-130941@lists.php.net to get a copy of this message | ||
From: krumb at valentins dot de
Operating system: Suse Linux
PHP version: 5.2.6
PHP Bug Type: Math related
Bug description: wrong calculating
Description:
------------
Some strange calculating mistake
It seems to happen in the second line at 7/100*100, echos zero, had to be
zero but internal it seems thats not zero
Reproduce code:
---------------
<?
$share=100;
$discount=7/100*$share;
$brutto=5.8824/100*(100+19);
$brutto=round($brutto,2);
echo $brutto."-".$discount."=";
$new=$brutto-$discount;
echo $new;
?>
Expected result:
----------------
7-7=0
Actual result:
--------------
7-7=-8.881784197E-16
--
Edit bug report at http://bugs.php.net/?id=46566&edit=1
--
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=46566&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=46566&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=46566&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=46566&r=fixedcvs
Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=46566&r=needdocs
Fixed in release: http://bugs.php.net/fix.php?id=46566&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=46566&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=46566&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=46566&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=46566&r=support
Expected behavior: http://bugs.php.net/fix.php?id=46566&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=46566&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=46566&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=46566&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46566&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=46566&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=46566&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=46566&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=46566&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=46566&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=46566&r=mysqlcfg