ns-random.tcl

在Linux下做的QuadTree的程序

#
# Copyright (c) 1996-1997 Regents of the University of California.
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# 	This product includes software developed by the MASH Research
# 	Group at the University of California Berkeley.
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# @(#) $Header: /home/am6/jinyang/cvs/our-ns/tcl/lib/ns-random.tcl,v 1.1.1.1 2000/08/28 18:40:39 jinyang Exp $
#

#Code to generate random numbers here
proc exponential {} {
    expr - log ([uniform 0 1])
}

proc uniform {a b} {
    expr $a + (($b - $a) * ([ns-random] * 1.0 / 0x7fffffff))
}

proc integer k {
    expr [ns-random] % abs($k)
}

RNG instproc uniform {a b} {
	expr $a + (($b - $a) * ([$self next-random] * 1.0 / 0x7fffffff))
}

RNG instproc integer k {
	expr [$self next-random] % abs($k)
}

RNG instproc exponential {} {
	expr - log ([$self uniform 0 1])
}


RandomVariable instproc test count {
	for {set i 0} {$i < $count} {incr i} {
		puts stdout [$self value]
	}
}


set defaultRNG [new RNG]
$defaultRNG seed 1
$defaultRNG default