/usr/share/calc/help/quomod 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 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | NAME
quomod - assign quotient and remainder to two lvalues
SYNOPSIS
quomod(x, y, Q, R [, rnd])
TYPES
x real
y real
Q null-or-real-valued lvalue with assign-to permission
R null-or-real-valued lvalue with assign-to permission
rnd nonnegative integer, defaults to config("quomod")
return 0 or 1
DESCRIPTION
If y is nonzero and x/y is an integer q, this function assigns
q to Q and zero to R, and returns zero.
If y is zero, zero is assigned to Q, x to R and 0 or 1 returned
according as x is zero or nonzero.
In the remaining case, y nonzero and x/y not an intger, there
are two pairs (q,r) for which x = q * y + r, q is an integer, and
abs(r) < abs(y). Depending on the low 5 bits of rnd, the q and r
of one of these pairs will be assigned to Q and R respectively,
and the number 1 returned. The effects of rnd can be described in
terms of the way q is related to x/y, e.g. by rounding down,
rounding towards zero, rounding to a nearest integeri, etc. or
by properties of the remainder r, e.g. positive, negative,
smallest, etc. The effects of the most commonly used values of
rnd are described in the following table:
rnd q r
0 round down. q = floor(x/y) same sign as y
1 round up, q = ceil(x/y) opposite sign to y
2 round to zero, q = int(x/y) same sign as x, r = y * frac(x/y)
3 round from zero oppsite sign to x
4 positive
5 negative
6 same sign as x/y
7 opposite sigh to x/y
8 to nearest even
9 to nearest odd
For 16 <= rnd < 32, the rounding is to the nearest integer and r
is the smallest (in absolute value) remainder except when x/y is
halfway between consecutive integers, in which case the rounding
is as given by the 4 low bits of rnd. Using rnd = 24 gives the
cpmmonly used principle of rounding: round to the nearest integer,
but take the even integer when there are two equally close integers.
For more detail on the effects of rnd for values other than those
listed above, see "help quo" and "help mod".
In all cases, the values assigned to Q and R by quomod(x, y, Q, R, rnd)
are the same as those given by Q = quo(x,y,rnd), R = mod(x,y,rnd).
If config("quo") == rnd, Q is also given by quo(x,y) or x // y.
If config("mod") == rnd, R is also given by mod(x,y) or x % y.
The rounding used by the C language for x / y and x % y corresponds
to rnd = 2.
An error values is returned and the values of Q and R are not changed
if Q and R are not both lvalues, or if the current value of any
argument is not as specified above, or if Q or R has no-assign-to
prptection, e.g. after protect(Q,1).
EXAMPLE
; global u, v;
; global mat M[2];
; print quomod(13,5,u,v), u, v, quomod(15.6,5.2,M[0],M[1]), M[0], M[1];
1 2 3 0 3 0
; A = assoc();
; print quomod(13, 5, A[1], A[2]), A[1], A[2]
; 1 2 3
; print quomod(10, -3, u, v), u, v;
1 -4 -2
; print quomod(10, -3, u, v, 0), u, v;
1 -4 -2
; print quomod(10, -3, u, v, 1), u, v;
1 -3 1
; print quomod(10, -3, u, v, 2), u, v;
1 -3 1
; print quomod(-10, -3, u, v, 2), u, v;
1 3 -1
LIMITS
rnd < 2^31
LINK LIBRARY
BOOL qquomod(NUMBER *q1, NUMBER *q2, NUMBER **quo, NUMBER **mod)
SEE ALSO
//, %, quo, mod, floor. ceil, int. frac
## 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: quomod,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/quomod,v $
##
## Under source code control: 1995/05/07 03:17:03
## File existed as early as: 1995
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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