RosettaCodeData/Task/Fusc-sequence/CLU/fusc-sequence.clu

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fusc = iter () yields (int)
q: array[int] := array[int]$[1]
yield(0)
yield(1)
while true do
x: int := array[int]$reml(q)
array[int]$addh(q,x)
yield(x)
x := x + array[int]$bottom(q)
array[int]$addh(q,x)
yield(x)
end
end fusc
longest_fusc = iter () yields (int,int)
sofar: int := 0
count: int := 0
for f: int in fusc() do
if f >= sofar then
yield (count,f)
sofar := 10*sofar
if sofar=0 then sofar:=10 end
end
count := count + 1
end
end longest_fusc
start_up = proc ()
po: stream := stream$primary_output()
stream$putl(po, "First 61:")
n: int := 0
for f: int in fusc() do
stream$puts(po, int$unparse(f) || " ")
n := n + 1
if n = 61 then break end
end
stream$putl(po, "\nLength records:")
n := 0
for i, f: int in longest_fusc() do
stream$putl(po, "fusc(" || int$unparse(i) || ") = " || int$unparse(f))
n := n + 1
if n = 5 then break end
end
end start_up