Re: Current implementation of exp() is faulty.
Jason Gade wrote:
>
> Right. And what I was trying to say was that converting from double to string
> to double again loses information. Better to do one conversion and compare
> apples
> to apples.
>
> I think that CChris is talking about an arbitrary precision library.
The parsercan return any nmber of bits in exact mode. Otherwise, it returns as
many bits as the number of digits provided allows in a safe way.
> Doesn't
> one of those already exist in the archive?
There are some:
1/ Extended Precision Arithmetic (A. Tammer)
2/ Big Number Arithmetic (Craig Gilbert), but which is somewhat buggy.
3/ Big Math (Matt)
4/ Calculations with long numbers (D. Money)
They are more or less practical, more or less extensible.
They will cover the basic 4 operations, not sure how they extend to arbitrary
precision real computations - they don't appear to handle anything related to
fuzziness or roundoff. I haven't investigated them thoroughl - I have some
unsubmitted stuff. Still, I prefer using other languages or software to
experiment in these areas.
CChris
>
> --
> A complex system that works is invariably found to have evolved from a simple
> system that works.
> --John Gall's 15th law of Systemantics.
>
> "Premature optimization is the root of all evil in programming."
> --C.A.R. Hoare
>
> j.
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