Je fais ce système expert pour les animaux de classification en utilisant prolog et j'utilise GNU/Prolog et Debian GNU/Linux.Petit système expert en prologue
xpositive(symbol,symbol)
xnegative(symbol,symbol)
nondeterm animal_is(symbol)
nondeterm it_is(symbol)
ask(symbol,symbol,symbol)
remember(symbol,symbol,symbol)
positive(symbol,symbol)
negative(symbol,symbol)
clear_facts
run
animal_is(cheetah):-
it_is(mammal),
it_is(carnivore),
positive(has,tawny_color),
positive(has,dark_spots).
animal_is(tiger):-
it_is(mammal),
it_is(carnivore),
positive(has, tawny_color),
positive(has, black_stripes).
animal_is(giraffe):-
it_is(ungulate),
positive(has,long_neck),
positive(has,long_legs),
positive(has, dark_spots).
animal_is(zebra):-
it_is(ungulate),
positive(has,black_stripes).
animal_is(ostrich):-
it_is(bird),
negative(does,fly),
positive(has,long_neck),
positive(has,long_legs),
positive(has, black_and_white_color).
animal_is(penguin):-
it_is(bird),
negative(does,fly),
positive(does,swim),
positive(has,black_and_white_color).
animal_is(albatross):-
it_is(bird),positive(does,fly_well).
it_is(mammal):-
positive(has,hair).
it_is(mammal):-
positive(does,give_milk).
it_is(bird):-
positive(has,feathers).
it_is(bird):-
positive(does,fly),
positive(does,lay_eggs).
it_is(carnivore):-
positive(does,eat_meat).
it_is(carnivore):-
positive(has,pointed_teeth),
positive(has, claws),
positive(has,forward_eyes).
it_is(ungulate):-
it_is(mammal),
positive(has,hooves).
it_is(ungulate):-
it_is(mammal),
positive(does,chew_cud).
positive(X,Y):-
xpositive(X,Y),!.
positive(X,Y):-
not(xnegative(X,Y)),
ask(X,Y,yes).
negative(X,Y):-
xnegative(X,Y),!.
negative(X,Y):-
not(xpositive(X,Y)),
ask(X,Y,no).
ask(X,Y,yes):-
!,
write(X," it ",Y,'\n'),
readln(Reply),nl,
frontchar(Reply,'y',_),
remember(X,Y,yes).
ask(X,Y,no):-
!,
write(X," it ",Y,'\n'),
readln(Reply),nl,
frontchar(Reply,'n',_),
remember(X,Y,no).
remember(X,Y,yes):-
assertz(xpositive(X,Y)).
remember(X,Y,no):-
assertz(xnegative(X,Y)).
clear_facts:-
write("\n\nPlease press the space bar to exit\n"),
retractall(_,dbasedom),readchar(_).
run:-
animal_is(X),!,
write("\nYour animal may be a (an) ",X),
nl,nl,clear_facts.
run:-
write("\nUnable to determine what"),
write("your animal is.\n\n"),
clear_facts.
run.
J'ai un problème avec ce programme. Je compile le programme, mais je reçois un message d'erreur:
GNU Prolog 1.3.0
By Daniel Diaz
Copyright (C) 1999-2007 Daniel Diaz
| ?- [system].
compiling /root/Dokumenty/Lab/Expert/system.pl for byte code...
/root/Dokumenty/Lab/Expert/system.pl:2:1: syntax error: . or operator expected after > expression
1 error(s)
compilation failed
J'essaie de résoudre mon problème, mais je reçois toujours le message d'erreur:
xpositive(symbol,symbol).
xnegative(symbol,symbol).
nondeterm animal_is(symbol)
nondeterm it_is(symbol)
ask(symbol,symbol,symbol)
remember(symbol,symbol,symbol)
positive(symbol,symbol)
negative(symbol,symbol)
clear_facts
run
Message d'erreur:
| ?- [system].
compiling /root/Dokumenty/Lab/Expert/system.pl for byte code...
/root/Dokumenty/Lab/Expert/system.pl:4:11: syntax error: . or operator expected after expression
1 error(s)
compilation failed
Merci pour votre aide à l'avance
avez-vous manqué. (un point) après certaines de vos lignes? –