:-main(1000). %main(A, B) :- gen(0, A, 10, As), gen(0, B, 5, Bs) , merge(As, Bs, Rs), outputln(Rs). %main(Max) :- gen(0, Max, 3, A), outputln(A). %main(A) :- ave(0, A, 0, Os), outputln(Os). main(Max) :- gen(0, Max, 10, S), ave(0, S, 0, Os), outputln(Os). outputln(Xs) :- true | output(Xs, Os), io:outstream(Os). output([P|Ps], Os) :- true | Os = [write(P), nl|Os1], output(Ps, Os1). output([] , Os) :- true | Os = []. gen(N, Max, Step, Ns) :- N=Max | Ns=[]. ave(N, [X|Xs], A, Os) :- true | Os=[As|Os1], N1:=N+1, As:=(X+A)/N1, ave(N1, Xs, As, Os1). ave(N, [] , A, Os) :- true | Os=[].