tennis([court, singles, doubles, outdoor, ball, racket]).
games([tennis, diving, soccer]). /* A list of games */
game_detail(tennis, [[court, 'two for doubles'], [singles, 'one for singles']]).
我正在制作一个游戏，prolog程序回答提问者的问题。 首先，我向提问者提供所有可用选项的列表，提问者可以询问带有查询的程序（X）。
我为每场比赛做了选择（奥运会为Q＆amp; A比赛）。 但是，如何让程序回答相应选项的详细信息？ 在这里，第二个元素（字符串）在另一个列表的列表中。
感谢您的帮助。
到目前为止我写的整个代码如下。
/* Game database */
tennis([court, singles, doubles, outdoor, ball, racket]).
diving([pool, singles, jump]).
soccer([ball, number, field]).
basketball([ball, number, field, foul]).
baseball([ball, number, field]).
fencing([number, field, foul]).
games([tennis, diving, soccer]). /* A list of games */
game_detail(tennis, [[court, 'two for doubles'], [singles, 'one for singles']]).
game_detail(diving, [[pool, '50m pool'], [singles, 'one swims 50m']]).
game_detail(soccer, [[ball, 'designated ball'], [number, '11 players']]).
/* Calling the corresponding answer for valid options */
detail(Game,[Option|Rest]).
detail(X,Y) :- game_detail(X,Options) .
Options = [[court, 'two'], [singles, 'one for']].
/* Random game selection */
rand(X) :- games(Y), random_member(X,Y), assert(selected(X)).
:- dynamic selected/1.
game_init :-
retract(selected(Y)),
retract(all_options(Z)),
all_options.
/* Counter */
:- dynamic counter/1.
counter(0). /* Initialize counter as 0 */
increment :- /* Set counter increment as 1 */
retract(counter(C)),
succ(C, C1),
assertz(counter(C1)).
cnt_init :- /* Initialize counter as 0 for next game */
retract(counter(C)),
assertz(counter(0)).
/* Showing all options of randomly selected game */
:- dynamic all_options/1.
all_options :- rand(X), call(X,Z), write(Z), assert(all_options(Z)).
/* Pop up the option from questioner */
delMember(_, [], []).
delMember(X, [X|Xs], Y) :-
delMember(X, Xs, Y).
delMember(X, [T|Xs], [T|Y]) :-
dif(X, T),
delMember(X, Xs, Y).
/* Answering has(X) query */
has(X) :- counter(C), all_options(Y),
( C=10 ->
write('Guess the game')
; C<10, member(X,Y) ->
write('Yes'), increment,
delMember(X,Y,Z),
retract(all_options(Y)), assert(all_options(Z))
; C<10, not(member(X,Y)) ->
write('No'), increment
; write('Invalid options')).
/* Answering is(X) query */
is(X) :- selected(Y), counter(C),
(X=Y ->
write('successful guess'), cnt_init, game_init
; C=10, not(X=Y) ->
write('unsuccessful guess'), cnt_init, game_init
; C<10, not(X=Y) ->
write('unsuccessful guess'), increment
).
/* Initialize program settings */
:- initialization(all_options).