RosettaCodeData/Task/Subtractive-generator/Wren/subtractive-generator.wren
2023-07-01 13:44:08 -04:00

36 lines
735 B
Text

var mod = 1e9
var state = List.filled(55, 0)
var si = 0
var sj = 0
var subrand // forward declaration
var subrandSeed = Fn.new { |p|
var p2 = 1
state[0] = p % mod
var j = 21
for (i in 1..54) {
if (j >= 55) j = j - 55
state[j] = p2
p2 = p - p2
if (p2 < 0) p2 = p2 + mod
p = state[j]
j = j + 21
}
si = 0
sj = 24
for (i in 1..165) subrand.call()
}
subrand = Fn.new {
if (si == sj) subrandSeed.call(0)
si = (si == 0) ? 54 : si - 1
sj = (sj == 0) ? 54 : sj - 1
var x = state[si] - state[sj]
if (x < 0) x = x + mod
state[si] = x
return x
}
subrandSeed.call(292929)
for (i in 0..9) System.print("r[%(i+220)] = %(subrand.call())")