Question

I have an operator stored in a variable Op and two integers are stored in X and Y. Now, I want to do something like (Z is X Op Y), but this syntax seems not to be correct.

Does anybody know if there is a way to do this in Prolog?

Thanks for your answers

Answer 1

you can do it by building the predicate using the =.. operator.

try it like:

compute(X,Y,Op,Z) :-
   Eq=..[Op, X, Y],
   Z is Eq.

An operator is really just like any other functor.