On 2013-09-16 11:46:43 +0200, Vincent Lefevre wrote:
> On 2013-09-15 20:37:51 -0400, Tim Prince wrote:
> > On 9/15/2013 3:42 PM, Arbol One wrote:
> > >Use a 'long long' value instead of a 'double'.
> ^^^^^^^^^
> long double
>
> > >
> > >#include <iostream>
> > >#include <math.h>
> > >
> > >using namespace std;
> > >int main() {
> > > long long temp = 0.0;
> ^^^^^^^^^
> long double
>
> > > temp = pow(2, 2000);
> > > cout << "The value of tmp is: " << temp << endl;
> > >
> > > return 0;
> > >}
> > >
> > :s/pow/powl/
> > but not all math libraries invoked by some gcc implementations will work.
>
> And on some platforms (ARM, PowerPC), "long double" has the same range
> of "double".
I forgot to say... If long double is not sufficient, you can
consider GNU MPFR. The maximum exponent is around 2^30 by default,
and it can be increased to 2^62 on 64-bit machines.
There's also DPE <https://gforge.inria.fr/projects/dpe/> but AFAIK,
it doesn't support many functions.
--
Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <http://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
