CLIPSjni集成java

Question

我刚开始使用与Jade agent.java集成的剪辑，我的事实和规则加载在不同的.clp文件中，我已经花了很多时间来比较我认为是数字的东西，但由于某种原因，它不起作用，尝试了许多不同的东西，没有什么东西使它工作:这里是我的事实的一部分：

(deffacts products 
        (product (name "USB Memory") (category storage) (part-number 1234) (price 9.99))
        (product (name Amplifier) (category electronics) (part-number 2341) (price 399.99))
        (product (name Speakers) (category electronics) (part-number 23241) (price 19.99))
        (product (name "iPhone 7") (category smartphone) (part-number 3412) (price 99))
        (product (name "Samsung Edge 7") (category smartphone) (part-number 34412) (price 88))
)

And here I have the rules that are not working:
(defrule my-rule14
   (not (product (category smartphone) **(price<50)**))
   =>
   (printout t "no smartphones cheaper than 50"  crlf ))


;; Defining a rule for finding smartphones cheaper than 100 dlls
(defrule my-rule15
   (product (category smartphone) (name ?nameb) **(price<100))**
   =>
   (printout t ?nameb " is cheaper than 100 dlls" crlf ))

没有一条规则起作用，我试着将比较改为{price<100}，(price< 100)，(价格< 100)，(价格?价格)(测试(<？price< 100))

谢谢。

Answer 1

基本编程指南的5.4.1.5和5.4.2节包含了所需语法的相关信息：

         CLIPS (6.4 2/9/21)
CLIPS> 
(deftemplate product
   (slot name)
   (slot category)
   (slot part-number)
   (slot price))
CLIPS>    
(deffacts products 
   (product (name "USB Memory") (category storage) (part-number 1234) (price 9.99))
   (product (name Amplifier) (category electronics) (part-number 2341) (price 399.99))
   (product (name Speakers) (category electronics) (part-number 23241) (price 19.99))
   (product (name "iPhone 7") (category smartphone) (part-number 3412) (price 99))
   (product (name "Samsung Edge 7") (category smartphone) (part-number 34412) (price 88)))
CLIPS> 
(defrule my-rule14
   (not (product (category smartphone) (price ?price&:(< ?price 50))))
   =>
   (printout t "no smartphones cheaper than 50" crlf))
CLIPS> 
(defrule my-rule15
   (product (category smartphone) (name ?nameb) (price ?price))
   (test (< ?price 100))
   =>
   (printout t ?nameb " is cheaper than 100 dlls" crlf ))
CLIPS> (reset)
CLIPS> (agenda)
0      my-rule15: f-5
0      my-rule15: f-4
0      my-rule14: *
For a total of 3 activations.
CLIPS> (run)
Samsung Edge 7 is cheaper than 100 dlls
iPhone 7 is cheaper than 100 dlls
no smartphones cheaper than 50
CLIPS>