#41106 [NEW]: Simple Expression But Doing Wrong Calculation
| From: | neel dot basu dot z at gmail dot net | Date: | Mon, 16 Apr 2007 18:03:16 +0000 |
| Subject: | #41106 [NEW]: Simple Expression But Doing Wrong Calculation | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-111557@lists.php.net to get a copy of this message | ||
From: neel dot basu dot z at gmail dot net
Operating system: Windows
PHP version: 5.2.1
PHP Bug Type: Math related
Bug description: Simple Expression But Doing Wrong Calculation
Description:
------------
Simple Expression but wrong output.
Reproduce code:
---------------
<?php
$res1 = (1.2-0.1)-1.1;// = 1.1-1.1 -> Evaluates to Zero
$res2 = (2.2-0.1)-2.1;// = 2.1-2.1 -> Also Evaluates to Zero
echo $res1."\t".gettype($res1);
echo "\n";
echo $res2."\t".gettype($res2);
?>
Expected result:
----------------
0 double
0 double
Actual result:
--------------
-2.22044604925E-016 double
0 double
--
Edit bug report at http://bugs.php.net/?id=41106&edit=1
--
Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=41106&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=41106&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=41106&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=41106&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=41106&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=41106&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=41106&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=41106&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=41106&r=support
Expected behavior: http://bugs.php.net/fix.php?id=41106&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=41106&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=41106&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=41106&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=41106&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=41106&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=41106&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=41106&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=41106&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=41106&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=41106&r=mysqlcfg