57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
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/* This is the example given and commented on the MPFR web site:
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* http://www.mpfr.org/sample.html
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*/
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/*
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Copyright 1999-2004, 2006-2016 Free Software Foundation, Inc.
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Contributed by the AriC and Caramba projects, INRIA.
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This file is part of the GNU MPFR Library.
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The GNU MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
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http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <stdio.h>
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#include <gmp.h>
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#include <mpfr.h>
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int main (void)
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{
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unsigned int i;
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mpfr_t s, t, u;
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mpfr_init2 (t, 200);
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mpfr_set_d (t, 1.0, MPFR_RNDD);
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mpfr_init2 (s, 200);
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mpfr_set_d (s, 1.0, MPFR_RNDD);
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mpfr_init2 (u, 200);
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for (i = 1; i <= 100; i++)
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{
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mpfr_mul_ui (t, t, i, MPFR_RNDU);
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mpfr_set_d (u, 1.0, MPFR_RNDD);
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mpfr_div (u, u, t, MPFR_RNDD);
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mpfr_add (s, s, u, MPFR_RNDD);
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}
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printf ("Sum is ");
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mpfr_out_str (stdout, 10, 0, s, MPFR_RNDD);
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putchar ('\n');
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mpfr_clear (s);
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mpfr_clear (t);
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mpfr_clear (u);
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return 0;
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}
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