prolog - Prolog 规则反映结构

Question

我需要设计一个测试贷款是否为汽车贷款的规则。

carLoan(flexiCar,minLoanAmount(20000),maxTenure(12) ).
iscarloan(X, Y, Z) :- carLoan(X, Y >= minLoanAmount(20000), Z =<(maxTenure(12)) ).
iscarloan(X, 25000, 10).

我需要根据规则内部的事实来测试 Y 和 Z 变量的结构。

如何做到这一点？

谢谢。

Answer 1

iscarloan(X, Y, Z) :-
  carLoan(X, minLoanAmount(MinLoan), maxTenure(MaxTenure)),
  Y >= MinLoan,
  Z =< MaxTenure.

这就是你的想法？

Answer 2

carLoan(flexiCar, minLoanAmount(20000), maxTenure(12)).

iscarloan(X, Y, Z) :-
    Y = minLoanAmount(MLA),
    Z = maxTenure(MT),
    MLAN is MLA,
    MTN is MT,
    MLAN >= 20000,
    MTN =< 12.

iscarloan(X, 25000, 10).