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我正在尝试编写一个 Prolog 应用程序,如果弓箭手将移动到相邻的正方形,该正方形在4 x 4 网格上是安全的。

例如弓箭手在方柱1行4,如果没有记录为M的怪物,他可以向上或向右移动。因此,如果第 2 列第 4 行怪物 (M)弓箭手 (A)不能移动到那里,但如果第 1 列第 3 行空的 (E),他可以移动到这里。弓箭手可以检查相邻方格是否安全,但不能比这更远。

这是我到目前为止得到的:

:- dynamic square/3.
:- dynamic show/1.

createBoard(N) :- 
    retractall(show(_)),
    assert(show([[1,1]])),
    retractall(square(_,_,_)),
    createBoard(N,N).

testBoard :-
    retractall(square(_,_,_)),
    retractall(show(_)),
    assert(show([[4,1]])),
    asserta(square(1,1,[e])),
    asserta(square(1,2,[e])),
    asserta(square(1,3,[s])),
    asserta(square(1,4,[e])),
    asserta(square(2,1,[e])),
    asserta(square(2,2,[b,s])),
    asserta(square(2,3,[m])),
    asserta(square(2,4,[g,s])),
    asserta(square(3,1,[b])),
    asserta(square(3,2,[p])),
    asserta(square(3,3,[g,b,s])),
    asserta(square(3,4,[x])),
    asserta(square(4,1,[a,e])),
    asserta(square(4,2,[b])),
    asserta(square(4,3,[e])),
    asserta(square(4,4,[g])).

% you can place a piece on a board of N size if you can generate a row
%   and column value and you can place that piece on an square empty square
place(Piece,N) :-
    Row1 is random(N),
    Col1 is random(N),
    place(Piece,Row1,Col1,N).

% you can place a pit if the square is empty at the specified
% position
place(p,Row,Col,_) :-
    square(Row,Col,[e]),
    retract(square(Row,Col,[e])),
    assert(square(Row,Col,[p])).

% Find an Item at a position R,C by
% examining the contents of the R,C, location
find(R,C,Item) :-
    square(R,C,Contents),
    member(Item,Contents).

我正在努力让弓箭手检查相邻的方格是否安全,如果是,则进入该方格。

如何才能做到这一点?

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