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exSystem01.pl
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exSystem01.pl
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/* exSystem.pro
character identification game.
start with ?- go. */
go :- hypothesize(Character),
write('I guess that the character is: '),
write(Character),
nl,
undo.
/* hypotheses to be tested */
hypothesize(quico) :- quico, !.
hypothesize(chaves) :- chaves, !.
hypothesize(nhonho) :- nhonho, !.
hypothesize(senhor_barriga) :- senhor_barriga, !.
hypothesize(girafales) :- girafales, !.
hypothesize(seu_madruga) :- seu_madruga, !.
hypothesize(jaiminho) :- jaiminho, !.
hypothesize(chiquinha) :- chiquinha, !.
hypothesize(popis) :- popis, !.
hypothesize(dona_florinda) :- dona_florinda, !.
hypothesize(dona_clotilde) :- dona_clotilde, !.
hypothesize(unknown). /* no diagnosis */
/* character identification rules */
quico :- boy,
verify(has_multicolored_hat).
chaves :- boy,
verify(lives_in_a_barrel).
nhonho :- boy,
verify(is_fat). % n precisa!
senhor_barriga :- adult_man,
verify(wears_suit),
verify(is_fat).
girafales :- adult_man,
verify(wears_suit),
verify(is_a_teacher).
seu_madruga :- adult_man,
verify(does_not_pay_rent).
jaiminho :- adult_man,
verify(is_a_postman).
chiquinha :- girl,
verify(wear_glasses).
popis :- girl,
verify(holds_a_doll).
dona_florinda :- adult_woman,
verify(wears_curlers).
dona_clotilde :- adult_woman,
verify(knows_dark_magic).
/* classification rules */
child :- verify(is_child).
man :- verify(is_man).
adult_man :- not(child),
man.
adult_woman :- not(child),
not(man).
boy :- child,
man.
girl :- child,
not(man).
/* how to ask questions */
ask(Question) :-
write('Does the character have the following attribute: '),
write(Question),
write('? '),
read(Response),
nl,
( (Response == yes ; Response == y)
->
assert(yes(Question)) ;
assert(no(Question)), fail).
:- dynamic yes/1,no/1.
/* How to verify something */
verify(S) :-
(yes(S)
->
true ;
(no(S)
->
fail ;
ask(S))).
/* undo all yes/no assertions */
undo :- retract(yes(_)),fail.
undo :- retract(no(_)),fail.
undo.