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fib.pl
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1992-03-25
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/* Prolog version of fib benchmark */
main :- fib(30,N), write(N), nl.
fib(N,F) :- N =< 1, F = 1.
fib(N,F) :- N > 1,
N1 is N - 1, fib(N1,F1),
N2 is N - 2, fib(N2,F2),
F is F1 + F2.