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/* This is the example given and commented on the MPFR web site:
* https://www.mpfr.org/sample.html
*/
/*
Copyright 1999-2004, 2006-2020 Free Software Foundation, Inc.
Contributed by the AriC and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <gmp.h>
#include <mpfr.h>
int main (void)
{
unsigned int i;
mpfr_t s, t, u;
mpfr_init2 (t, 200);
mpfr_set_d (t, 1.0, MPFR_RNDD);
mpfr_init2 (s, 200);
mpfr_set_d (s, 1.0, MPFR_RNDD);
mpfr_init2 (u, 200);
for (i = 1; i <= 100; i++)
{
mpfr_mul_ui (t, t, i, MPFR_RNDU);
mpfr_set_d (u, 1.0, MPFR_RNDD);
mpfr_div (u, u, t, MPFR_RNDD);
mpfr_add (s, s, u, MPFR_RNDD);
}
printf ("Sum is ");
mpfr_out_str (stdout, 10, 0, s, MPFR_RNDD);
putchar ('\n');
mpfr_clear (s);
mpfr_clear (t);
mpfr_clear (u);
mpfr_free_cache ();
return 0;
}
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