[MPFRCPP] Re: MPFRCPP Question

[Alexey Beshenov]

On Wednesday 05 December 2007 08:52, Vladan Bozic wrote:

> I am planning on storing all constants used by my procedures in a
> separate file and this is where I encounter some problems.

> [...]

> const Real ktab19_3 =
> 0.3173792625963528200426948557929716065822159652762980415259019731018799499
>5063706220066472607895786721425182565276490599701898980808436994071610337023
>3;

> [...]

> Once ran, the main procedure outputs:
>       3.1737926259635280e-01
> which is a lot less of digits then I require.

C++ doesn't know anything about arbitrary precision numbers, so your 
definition is treated as a double precision number converted to MPFR type. 
You should store constants as strings. It's important not only for high 
precision numbers but also for non-integer numbers which are not represented 
as finite binary fractions.

-- 
Alexey Beshenov <address@hidden>
http://beshenov.ru/

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