DOMAINS
unsigned,X,Y = string
PREDICATES
faktorial (unsigned,real)
CLAUSES
faktorial(1,1):-!.
faktorial(X,FaktoX):-
Y=X-1,
faktorial(Y,FaktoY),
FaktoX = X*FaktoY.
GOAL
X=3,
faktorial (X,Y).
http://img412.imageshack.us/img412/3808/image11pc0.gif
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