Edit report at http://bugs.php.net/bug.php?id=46781&edit=1
ID: 46781
Comment by: testify4 at o2 dot pl
Reported by: preechaw at gmail dot com
Summary: BC math handles minus zero incorrectly
Status: Bogus
Type: Bug
Package: BC math related
Operating System: Windows XP
PHP Version: 5.2.7
Block user comment: N
Private report: N
New Comment:
j...@php.net, "expected result" that you got is obviously incorrect. I
am using PHP 5.3.3 and this bug still exists. Please change the bug
status. Thank you.
Reproduce code:
---------------
<?php
bcscale(2);
print bcadd('-0.0', '-0.0') . '<br>'; // prints: -0.00, should be: 0.00
print bccomp('-0.0', '0') . '<br>'; // prints: -1, should be: 0
?>
Previous Comments:
------------------------------------------------------------------------
[2009-01-21 20:01:07] j...@php.net
I get the expected result with current release. (5.2.8)
------------------------------------------------------------------------
[2008-12-06 12:39:40] preechaw at gmail dot com
Description:
------------
bcadd("-0.0", "-0.0", 1); // returns -0.0
bccomp("-0.0", "0", 1); // returns -1
I believe that the first expression should return '0.0',
and the second one should return 0.
The second expression implies that "-0.0" is mathematically less than
"0", which is incorrect.
--
I also submitted another bug related to minus zero.
echo -0.1 * 0; // returns -0
--
Reproduce code:
---------------
<?php
echo bcadd("-0.0", "-0.0", 1) . "<br>\n"; // returns -0.0
echo bccomp("-0.0", "0", 1) . "<br>\n"; // returns -1
?>
Expected result:
----------------
-0.0
-1
Actual result:
--------------
0.0
0
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=46781&edit=1
