True, it's not a Perl issue (I've been able to duplicate the problem in C,
and Scheme), but I'm looking for a Perl solution. Math::BigFloat seems to
work well enough.
Thanks,
Peter
|---------+---------------------------->
| | "Levon Barker" |
| | <[EMAIL PROTECTED]> |
| | |
| | 08/21/2003 03:09 |
| | PM |
| | |
|---------+---------------------------->
>--------------------------------------------------------------------------------------------------------------|
|
|
| To: [EMAIL PROTECTED], [EMAIL PROTECTED]
|
| cc:
|
| Subject: RE: trouble with math... driving me nuts.
|
>--------------------------------------------------------------------------------------------------------------|
Hi Peter,
This is a floating point issue. It is a general computing problem and not
just subject to Perl. In decimal form the result
is -0.0000000000000017763568.
Generally thats usually acurate enough. Otherwise you could truncate it or
round it to the nearest quadrabillionth.
Cheers,
Levon Barker
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Sent: Thursday, August 21, 2003 3:06 PM
> To: [EMAIL PROTECTED]
> Subject: trouble with math... driving me nuts.
>
>
> Luckily I was easily able to recreate the problem. See code below:
>
> print 37.75 - 33.67 - 4.08 ;
> <STDIN>;
>
> I find these things all the time. Is there a particular module I can use
> to fix these things?
>
> Output is
>
> -1.77635683940025e-015
>
> Should be 0
>
> Running on Win2000 / Intel P3
>
> -Peter
>
>
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