what libraries/classes to use for precision significant calculations?

[Jess]

Hello,

I'm doing some calculations with great amount of precisions required.
Can somebody please suggest some suitable libraries or classes to use?

Thanks,
Jess

 

[hbrt]

Hi!
It seems you need sometimes precise what kind of precision you
need ;-)
Try this site: http://www.oonumerics.org/oon/ . But maybe someone
could help you a little more, if you wrote what are you really doing?
You need floating point numerics or fixed point? Maybe your algorithm
needs great precision, but input and output data have lower ones? So
maybe there is a better, less-precise-greedy algorithm?
These are sugestion for going around the problem. But - try the site I
linked above.
And give us your results ;-)

Best regards,
hbrt

 

[Ondra Holub]

Hello,

I'm doing some calculations with great amount of precisions required.
Can somebody please suggest some suitable libraries or classes to use?

Thanks,
Jess

You can try http://gmplib.org/

 

[Jess]

Thanks a lot! I just got round to check out the libraries, they seem
to offer functionalities for specific purposes. I think what I'm
looking for is something more general, some kind of classes that act
like Java's BigNumber or BigDecimal. Is there anything like that in c+
+?

Thanks!
Jess

 

[Victor Bazarov]

Thanks a lot! I just got round to check out the libraries, they seem
to offer functionalities for specific purposes. I think what I'm
looking for is something more general, some kind of classes that act
like Java's BigNumber or BigDecimal. Is there anything like that in
c+ +?

Google for "arbitrary precision floating point C++" or something like
that. You will most likely find at least something, choose the most
generic and use it.

V