3 * $Id: factorial.c,v 1.2 2001/06/16 13:22:59 mdw Exp $
5 * Example factorial computation
7 * (c) 2000 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
32 * $Log: factorial.c,v $
33 * Revision 1.2 2001/06/16 13:22:59 mdw
34 * Added command-line option to select output radix.
36 * Revision 1.1 2000/07/09 21:30:49 mdw
37 * Demo program to compute factorials.
41 /*----- Header files ------------------------------------------------------*/
46 #include <mLib/mdwopt.h>
47 #include <mLib/quis.h>
48 #include <mLib/report.h>
52 /*----- Main code ---------------------------------------------------------*/
54 int main(int argc
, char *argv
[])
64 static const struct option opt
[] = {
65 { "radix", OPTF_ARGREQ
, 0, 'r' },
68 int i
= mdwopt(argc
, argv
, "r:", opt
, 0, 0, 0);
75 die(EXIT_FAILURE
, "bad radix `%s'", optarg
);
82 if (optind
+ 1 != argc
) {
83 pquis(stderr
, "Usage: $ [-r radix] integer\n");
86 x
= strtoul(argv
[optind
], &p
, 0);
88 die(EXIT_FAILURE
, "bad integer `%s'", argv
[optind
]);
90 mp_writefile(f
, stdout
, r
);
96 /*----- That's all, folks -------------------------------------------------*/