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randbit - subtractive 100 shuffle pseudo-random number generator
SYNOPSIS
randbit([x])
TYPES
x integer
return integer
DESCRIPTION
If x > 0, randbit(x) returns a pseudo-random integer in [0, 2^x),
i.e. the same as rand(2^x). If the integer returned is
b_1 * 2^(x-1) + b_2 * 2^(x-2) + ... + b_n,
where each b_i is 0 or 1, then b_1, b_2, ..., b_n may be
considered as a sequence of x random bits.
If x <= 0, randbit(x) causes the random-number generator to skip
abs(x) bits, and returns abs(x).
If x is omitted, it is assumed to have the value of 1.
See the rand() help page for details on the subtractive 100 shuffle
pseudo-random number generator.
EXAMPLE
; print srand(0), randbit(20), randbit(20), randbit(20), randbit(20)
RAND state 817647 476130 944201 822573
; print srand(0), randbit(-20), randbit(20), randbit(-20), randbit(20)
RAND state 20 476130 20 822573
LIMITS
x != 0
LINK LIBRARY
void zrand(long cnt, ZVALUE *res)
SEE ALSO
seed, srand, randbit, isrand, random, srandom, israndom
## Copyright (C) 1999,2018,2021 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.
##
## Under source code control: 1996/01/01 03:17:22
## File existed as early as: 1996
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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