How do you use 'Pi' and 'e' with GMP?
Marc Glisse
marc.glisse at inria.fr
Wed Mar 1 23:52:04 UTC 2017
On Wed, 1 Mar 2017, Chris Shreve wrote:
> Hello,
>
> I've just started using GMP (and have looked through at least half the
> archives) and
> was wondering: how do you use Pi and e in GMP. Are pi and e defined as
> constants somewhere? Or are there functions that return these values to an
> arbitrary precision?
>
> For example how would I represent/printout the first 1000 digits of
> pi^(2*e). Moreover,
> how would I store and use it? I assume mpf_t?
Let me save you time: do not use mpf_t from GMP, go look at MPFR (it is
based on GMP) instead, which is more recent and much more complete. It has
functions like mpfr_const_pi that should work for you.
--
Marc Glisse
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