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.
, . animal_is it_is. , , ositive (X,Y) negative (X,Y). , , :
Does it have hair?
, .
. , :
Database
Xpositive(symbol,symbol)
Xnegative(symbol,symbol)
, , :
Xnegative(has,hair).
, , , , :
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).
³, , positive negative , , .
ask . Y, Yes, , N, - No.
ask(X,Y,yes):-!, write(X,"it",Y,'\n'),
Readln(Reply),
frontchar(Reply, 'y',_),
Remember(X,Y,yes).
ask(X,Y,no):-!, write(X,"it",Y,'\n'),
Readln(Reply),
frontchar(Reply, 'n',_),
Remember(X,Y,no).
remember(X,Y,yes):- assertr(xpositive(X,Y)).
remember(X,Y,no):- assertr(xnegative(X,Y)).
` . ϳ , , . retractall, clearfacts.
clear_facts:-
write("\n\n Please press the space bar to exit\n"),
Retractall(_, dbasedom),
