Maximum Float Precision

[Mike Trader]

What is the maximum precision I can squeak out of a variable?

Is it just double precision?

I need to represent this number:

Phi = 1·61803 39887 49894 84820 45868 34365 63811 77203 09179 80576 ...

from:

Phi = (SQRT(5) + 1)/2

FYI - then I need to use Phi to find a FIB number with:

Fibn = Phi^n - (-1^n) / Phi^n / SQRT(5)


------------------
Kind Regards
Mike

[Tom Hanlin]

That goes well beyond the precision of even PowerBASIC's extended floating point types. You're going to need something like a good indefinite-precision BCD library.


------------------
Tom Hanlin
PowerBASIC Staff

[Mike Trader]

Wassat?

------------------
Kind Regards
Mike

[Lance Edmonds]

It's a fancy name for a third-party maths library that offers a very high degree of floating point precision...

Try asking over at http://www.teratech.com - they have maths packages, but I'm not sure if they deal with this level of precision.

------------------
Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Aldo Vitagliano]

Mike,
If you don't need to incorporate routines into PB but only to perform math operations with many (>2000) digits
you might try the free UBASIC interpreter:

ftp://rkmath.rikkyo.ac.jp/pub/ubibm/



------------------
Aldo Vitagliano
mailto:[email protected][email protected]</A>