Created
December 5, 2014 17:33
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Sieve of Eratosthenes
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| % Author: [email protected] | |
| % Date: 12/5/2014 | |
| add(1) :- !. | |
| add(X) :- asserta(prime(X)), Y is X-1, add(Y). | |
| do_sieve(X, Y) :- ( X \== Y -> retract(prime(Y)) ; true), Z is Y + X, do_sieve(X,Z). | |
| sieve :- prime(T), do_sieve(T,T). | |
| sieve(N) :- ( add(N), sieve ); forall(prime(X), writeln(X)), true. |
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