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Annotation of 43BSDTahoe/man/man3f/rand.3, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1983 Regents of the University of California.
                      2: .\" All rights reserved.  The Berkeley software License Agreement
                      3: .\" specifies the terms and conditions for redistribution.
                      4: .\"
                      5: .\"    @(#)rand.3f     6.1 (Berkeley) 5/15/85
                      6: .\"
                      7: .TH RAND 3F "May 15, 1985"
                      8: .UC 5
                      9: .SH NAME
                     10: rand, drand, irand \- return random values
                     11: .SH SYNOPSIS
                     12: .B function irand (iflag)
                     13: .sp 1
                     14: .B function rand (iflag)
                     15: .sp 1
                     16: .B double precision function drand (iflag)
                     17: .SH DESCRIPTION
                     18: .ft B
                     19: The newer random(3f) should be used in new applications;
                     20: rand remains for compatibilty.
                     21: .ft R
                     22: .PP
                     23: These functions use
                     24: .IR rand (3C)
                     25: to generate sequences of random numbers.
                     26: If
                     27: .I iflag
                     28: is '1', the generator is restarted and the first random value is returned.
                     29: If
                     30: .I iflag
                     31: is otherwise non-zero, it is used as a new seed for the random number
                     32: generator, and the first new random value is returned.
                     33: .PP
                     34: .I Irand
                     35: returns positive integers in the range 0 through 2147483647.
                     36: .I Rand
                     37: and
                     38: .I drand
                     39: return values in the range 0. through 1.0 .
                     40: .SH FILES
                     41: .ie \nM /usr/ucb/lib/libF77.a
                     42: .el /usr/lib/libF77.a
                     43: .SH "SEE ALSO"
                     44: random(3F), rand(3C)
                     45: .SH BUGS
                     46: The algorithm returns a 15 bit quantity on the PDP11; a 31 bit quantity
                     47: on the VAX.
                     48: .I Irand
                     49: on the PDP11 calls
                     50: .IR rand (3C)
                     51: twice to form a 31 bit quantity, but bit 15 will always be 0.

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