Prolog 组合规则

发布于 2024-09-11 01:55:04 字数 451 浏览 6 评论 0原文

我需要编写一条由子规则组成的规则。

知道如何实现这一目标吗？

isloanaccept(Name, LoanAmount, LoanTenure) 
:-  customer(Name, bank(_),customertype(_),
    citizen(malaysian),age(Age),credit(C),
    income(I),property(car|house)), 
    Age >= 18,
    C > 500, 
    I > (LoanAmount / LoanTenure) / 12.
lowerinterest(Senior) :- isseniorcitizen(Senior).

例如，我需要检查客户类型。如果客户类型是 VIP，则利息较低。如果年龄超过60岁，利息会降低。

请帮忙。

谢谢。

原文

i need to write a rule which consists of sub rule.

Any idea how to achieve this ?

isloanaccept(Name, LoanAmount, LoanTenure) 
:-  customer(Name, bank(_),customertype(_),
    citizen(malaysian),age(Age),credit(C),
    income(I),property(car|house)), 
    Age >= 18,
    C > 500, 
    I > (LoanAmount / LoanTenure) / 12.
lowerinterest(Senior) :- isseniorcitizen(Senior).

For instance, i need to check the customer type .
If customer type is VIP, interest lower.
If age is above 60, interest lower.

Please help.

Thanks.

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涫野音 2024-09-18 01:55:04

向 isloanaccept 添加额外的参数可能是最简单的方法。

isloanaccept(Name, LoanAmount, LoanTenure, Interest) :-
    customer(Name, bank(_), customertype(Type), citizen(malaysian), age(Age),
             credit(C), income(I), property(car|house)), 
    Age >= 18,
    C > 500,
    I > (LoanAmount / LoanTenure) / 12,
    interest(Age, Interest).

% Interest depending on age and customertype; add parameters, or pass in a list,
% to have interest determined by other factors
interest(Age,Type,Interest) :-
    (senior_citizen(Age) ->
        Interest = 0.05
    ; Type = vip ->
        Interest = 0.07
    ;
        Interest = 0.10
    ).

PS.：请尝试以这种方式格式化 Prolog 代码，这样会更容易阅读。

Adding an extra argument to isloanaccept is probably the easiest way.

isloanaccept(Name, LoanAmount, LoanTenure, Interest) :-
    customer(Name, bank(_), customertype(Type), citizen(malaysian), age(Age),
             credit(C), income(I), property(car|house)), 
    Age >= 18,
    C > 500,
    I > (LoanAmount / LoanTenure) / 12,
    interest(Age, Interest).

% Interest depending on age and customertype; add parameters, or pass in a list,
% to have interest determined by other factors
interest(Age,Type,Interest) :-
    (senior_citizen(Age) ->
        Interest = 0.05
    ; Type = vip ->
        Interest = 0.07
    ;
        Interest = 0.10
    ).

PS.: Please try to format Prolog code this way, that makes it a lot easier to read.

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记忆消瘦 2024-09-18 01:55:04

这就是我要做的：

% usage: isInterestOk(+CustomerType, +Interest)
isInterestOk('VIP', Interest) :-
    Interest =< 1000.
isInterestOk('normal', Interest) :-
    Interest =< 500.

That's what I would do:

% usage: isInterestOk(+CustomerType, +Interest)
isInterestOk('VIP', Interest) :-
    Interest =< 1000.
isInterestOk('normal', Interest) :-
    Interest =< 500.

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