转换句子会产生无限循环-但是如何? [英] Transforming a sentence creates an infinite loop - but how?

问题描述

我不知道哪里出了问题.请注意，我对Prolog还是陌生的，我确定我缺少什么-只是不知道那是什么.有人可以帮我吗?

I can't figure out where this is going wrong. Please note that I am very new to Prolog and I'm sure I'm missing something - just no idea what that might be. Could anyone help me out please?

谢谢，这是我的代码:

printSentence([]).   
printSentence([W|[]]) :-
    write(W),
    write('.'),
    nl.  
printSentence([W|R]) :-
    write(W),
    write(' '),
    printSentence(R).

transform([], Result).  
transform([Word|Rest], Result) :-
    replace(Word, Replacement),
    append(Result, Replacement, NewResult),
    transform(Rest, NewResult).

replace(my, your).
replace(i, you).
replace(you, me).
replace(am, are).
replace(Word, Word).

test :-
    X = [you, are, my, only, hope],
    transform(X, Result),
    printSentence(Result).

推荐答案

这应该有效.请注意，您在transform([],Result)中有一个单例.另外，append不能以您尝试使用它的方式工作，但是您通常处于正确的轨道上.

This should work. Notice you had a singleton in transform([],Result). Also, append doesn't work in the way you tried to use it, but you were on the right track generally.

transform([], []).

transform([Word|Rest], [Replacement|RestOfResult]) :-
    replace(Word, Replacement),
    transform(Rest, RestOfResult).

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