/usr/share/calc/help/perm is in apcalc-common 2.12.4.4-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | NAME
perm - permutation number
SYNOPSIS
perm(x, y)
TYPES
x int
y int
return int
DESCRIPTION
Return the permutation number P(x,y) which is defined as:
x!
--------
(x-y)!
This function computes the number of permutations in which y things
may be chosen from x items where order in which they are chosen matters.
EXAMPLE
; print perm(7,3), perm(7,4), perm(7,5), perm(3,0), perm(0,0)
210 840 2520 3 0
; print perm(2^31+1,3)
9903520314283042197045510144
LIMITS
x >= y >= 0
y < 2^24
LINK LIBRARY
void zperm(NUMBER x, y, *ret)
SEE ALSO
comb, fact, randperm
## Copyright (C) 1999-2006 Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc 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.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL. You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
##
## @(#) $Revision: 30.1 $
## @(#) $Id: perm,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/perm,v $
##
## Under source code control: 1994/10/20 04:03:02
## File existed as early as: 1994
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
|