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Ingy döt Net 2013-06-05 21:47:54 +00:00
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Task/Fibonacci-sequence/Prolog/fibonacci-sequence-9.pro Normal file
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% Fibonacci sequence generator
fib(C, [P,S], C, N) :- N is P + S.
fib(C, [P,S], Cv, V) :- succ(C, Cn), N is P + S, !, fib(Cn, [S,N], Cv, V).
fib(0, 0).
fib(1, 1).
fib(C, N) :- fib(2, [0,1], C, N). % Generate from 3rd sequence on