is there a utility class to store unlimited floating point number?

[derek.ldn]

'double' data type can only represent 1.79769e+308 by maximum on a 32
bit machine. Is there a utility class somewhere to store unlimited
floating point number?

Thanks,
Derek

[Salt_Peter]

On Aug 16, 4:26 pm, [e-mail] wrote:

'double' data type can only represent 1.79769e+308 by maximum on a 32
bit machine. Is there a utility class somewhere to store unlimited
floating point number?

Thanks,
Derek

Thats incorrect, the range of a double is roughly double that
(negative range).
2.2e–308 to 1.8e308
Do you realize what 1.8e308 is? One trillion is 1.0e12.

[Kai-Uwe Bux]

de*******@googlemail.com wrote:

'double' data type can only represent 1.79769e+308 by maximum on a 32
bit machine.

Maybe on your 32 bit machine. The standard remains largely silent about this
issue.

Is there a utility class somewhere to store unlimited floating point
number?

Not in the standard. There are, however, third party libraries. A google
search should help.
Best

Kai-Uwe Bux

[Juha Nieminen]

de*******@googlemail.com wrote:

'double' data type can only represent 1.79769e+308 by maximum on a 32
bit machine.

You mean the range is different in a 64-bit machine?

Is there a utility class somewhere to store unlimited
floating point number?

http://gmplib.org/

[Przemyslaw Koprowski]

On Sat, 16 Aug 2008 13:26:26 -0700, derek.ldn wrote:

'double' data type can only represent 1.79769e+308 by maximum on a 32
bit machine. Is there a utility class somewhere to store unlimited
floating point number?

Look at the links at the end of this page:
http://en.wikipedia.org/wiki/Arbitra...ion_arithmetic

P.

[derekli.uk]

* You mean the range is different in a 64-bit machine?

It's implementation dependent, isn't it?

http://en.wikipedia.org/wiki/Arbitra...ion_arithmetic

which one would you recommend?

[Juha Nieminen]

de********@gmail.com wrote:

> You mean the range is different in a 64-bit machine?

It's implementation dependent, isn't it?

Strictly speaking, yes. In practice, however, in most desktop computer
systems (and most server systems) a double will be an IEEE 64-bit
floating point number.

>http://en.wikipedia.org/wiki/Arbitra...ion_arithmetic

which one would you recommend?

If you are not afraid of C, the GMP library seems rather popular and
efficient. (Although I believe there's a C++ wrapper for GMP. Never
tried it, though.)