On Sunday 03 November 2002 01:41 am, Michael Vanier wrote:
> I agree with your criticisms.  However, what I want is to be able to
> set the float precision on a project-wide basis.  In other words, I
> want to be able to say "all BigFloats now have 10 decimal places" and
> do some computations.  If I suspect that the results are incorrect
> due to compounding of numerical errors, I want to be able to change
> this to 100 decimal places in one place only and recompute my
> results.  It may not be thread safe or modular, but it's what I want
> to be able to do.  Having to adjust float precision in a zillion
> different places is simply unmaintainable.
>
> Mike


There are rules for when one gains and loses precision by multiplying 
/Div / Add / sub floating pt numbers together. Any good comp sci book 
on arbitrary prec floating point techniques contains them.

Why not just make and use a implementation that follows these rules? 
That way, you never have too much or too little precision... ;)

You can also set it yourself, or subclass from the arb fp class and get 
that universal precision you want...

-Daniel