ID: 13551
Updated by: manuel
Reported By: [EMAIL PROTECTED]
Old Status: Analyzed
Status: Open
Old Bug Type: Documentation problem
Bug Type: BC math related
Operating System: Linux 2.2.18
PHP Version: 4.0.6
New Comment:
That is incorrect. BC is for arbitrary percision arithmetic. Arguments should be
strings not integers. Just change the precision argument in the example from 0 to 2
and you will see that it will consider the decimal places of the multiplication
arguments.
The problem is that the way PHP BC module is working is that it applies the decimal
places to arguments when it should only apply to the result.
bcmul('8.78','100',2) should be '878.00'
and
bcmul('8.78','100',0) should be '878' and not '800', otherwise BC PHP module is
useless because you can't perform a calculation and control the decimal places of the
result without affecting the operands.
It should work like sprintf("%.2f",$operand_1*$operand_2) where 2 is the number of
decimal places of the output and and not of the operand values because these may have
much more decimal places than the result.
Previous Comments:
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[2001-10-05 02:21:10] [EMAIL PROTECTED]
It's not a bug, but a feature (tm). BC only works with integer values, and all
arguments must be integer values.
However, the documentation is not quite clear here.
Derick
------------------------------------------------------------------------
[2001-10-04 19:49:04] [EMAIL PROTECTED]
Confirmed with latest CVS. Either the documentation is wrong or the implementation.
Both won't need rocket sience to fix ...
Btw, this seems to be true for all bc*() functions.
Probably the documentation isn't clear enough about the current behaviour. Andi?
- Markus
------------------------------------------------------------------------
[2001-10-04 19:18:17] [EMAIL PROTECTED]
BC functions apply decimal places also on arguments but it should only apply them on
the result.
For example bcmul('8.78','100',0) should return 878 and not 800 as it does now.
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Edit this bug report at http://bugs.php.net/?id=13551&edit=1
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