mptest-5.c
上传用户:lyxiangda
上传日期:2007-01-12
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文件大小:3k
- /*
- * Simple test driver for MPI library
- *
- * Test 5: Other number theoretic functions
- *
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the MPI Arbitrary Precision Integer Arithmetic
- * library.
- *
- * The Initial Developer of the Original Code is Michael J. Fromberger.
- * Portions created by Michael J. Fromberger are
- * Copyright (C) 1998, 1999, 2000 Michael J. Fromberger.
- * All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the GPL.
- *
- * $Id: mptest-5.c,v 1.2 2000/08/09 20:46:59 nelsonb%netscape.com Exp $
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
- #include <limits.h>
- #include "mpi.h"
- int main(int argc, char *argv[])
- {
- mp_int a, b, c, x, y;
- if(argc < 3) {
- fprintf(stderr, "Usage: %s <a> <b>n", argv[0]);
- return 1;
- }
- printf("Test 5: Number theoretic functionsnn");
- mp_init(&a);
- mp_init(&b);
- mp_read_radix(&a, argv[1], 10);
- mp_read_radix(&b, argv[2], 10);
- printf("a = "); mp_print(&a, stdout); fputc('n', stdout);
- printf("b = "); mp_print(&b, stdout); fputc('n', stdout);
-
- mp_init(&c);
- printf("nc = (a, b)n");
- mp_gcd(&a, &b, &c);
- printf("Euclid: c = "); mp_print(&c, stdout); fputc('n', stdout);
- /*
- mp_bgcd(&a, &b, &c);
- printf("Binary: c = "); mp_print(&c, stdout); fputc('n', stdout);
- */
- mp_init(&x);
- mp_init(&y);
- printf("nc = (a, b) = ax + byn");
- mp_xgcd(&a, &b, &c, &x, &y);
- printf("c = "); mp_print(&c, stdout); fputc('n', stdout);
- printf("x = "); mp_print(&x, stdout); fputc('n', stdout);
- printf("y = "); mp_print(&y, stdout); fputc('n', stdout);
- printf("nc = a^-1 (mod b)n");
- if(mp_invmod(&a, &b, &c) == MP_UNDEF) {
- printf("a has no inverse mod bn");
- } else {
- printf("c = "); mp_print(&c, stdout); fputc('n', stdout);
- }
- mp_clear(&y);
- mp_clear(&x);
- mp_clear(&c);
- mp_clear(&b);
- mp_clear(&a);
- return 0;
- }