From: Dave Thomas <dave@...>
Date: 2004-05-13T02:18:01+09:00
Subject: Re: Major Addition Bug?


On May 12, 2004, at 12:07, Sean O'Dell wrote:

> On Wednesday 12 May 2004 09:53, ts wrote:
>>>>>>> "S" == Sean O'Dell <sean@celsoft.com> writes:
>>
>> S> raise "false" if ((625.91 + 900.00 + 22.00) != 1547.91)
>
>   How old is this bug?  When is it
> getting fixed?

It's about 40 years old, and unlikely to be fixed. Floating point 
numbers are not represented exactly inside computers, and so floating 
point comparisons are routinely deprecated in books on programming.  
Certain values cannot ever be expressed in floating point 
representation.

If you want exact, fractional, math, you should probably use the 
'rational' library and investigate 'mathn'.


Cheers

Dave