Re: Need more precision.

[Tux]

As nobody mentioned this so far, I'll bite on "perl has not and my compiler has" part. Perl by default configures/compiles to "normal" doubles, but it has an option to use long doubles for NV types.

Configure your perl with -Duselongdouble

$ perl -V:uselongdouble\|nvsize
nvsize='16';
uselongdouble='define';
$ perl -MData::Dumper -wE'say Dumper cos 1'
$VAR1 = '0.540302305868139717';

$ perl5.10.1 -V:uselongdouble\|nvsize
nvsize='8';
uselongdouble='undef';
$ perl5.10.1 -MData::Dumper -wE'say Dumper cos 1'
$VAR1 = '0.54030230586814';
$

[syphilis]

Configure your perl with -Duselongdouble

On Windows, you can build in long double support only with perl-5.22.0 and later ... and even then only if you're using a MinGW port of the gcc compiler.

Cheers,
Rob

[BrowserUk]

My compiler (MSVC) "supports" the long double type, but "The long double type is identical to the double type."

So it does me no good at all. Thanks for the thought though :)