80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
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/* Exercise mpz_fac_ui.
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Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP 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 2.1 of the License, or (at your
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option) any later version.
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The GNU MP 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 MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "tests.h"
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/* Usage: t-fac_ui [x|num]
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With no arguments testing goes up to the initial value of "limit" below.
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With a number argument tests are carried that far, or with a literal "x"
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tests are continued without limit (this being meant only for development
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purposes). */
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int
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main (int argc, char *argv[])
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{
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unsigned long n;
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unsigned long limit = 1500;
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mpz_t f, r;
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tests_start ();
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if (argc > 1 && argv[1][0] == 'x')
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limit = ULONG_MAX;
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else if (argc > 1)
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limit = atoi (argv[1]);
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/* for small limb testing */
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limit = MIN (limit, MP_LIMB_T_MAX);
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mpz_init_set_ui (f, 1); /* 0! = 1 */
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mpz_init (r);
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for (n = 0; n < limit; n++)
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{
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mpz_fac_ui (r, n);
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MPZ_CHECK_FORMAT (r);
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if (mpz_cmp (f, r) != 0)
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{
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printf ("mpz_fac_ui(%lu) wrong\n", n);
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printf (" got "); mpz_out_str (stdout, 10, r); printf("\n");
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printf (" want "); mpz_out_str (stdout, 10, f); printf("\n");
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abort ();
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}
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mpz_mul_ui (f, f, n+1); /* (n+1)! = n! * n */
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}
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mpz_clear (f);
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mpz_clear (r);
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tests_end ();
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exit (0);
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}
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