我是CLIPS的新手，感谢您的帮助。问题如下：如果我有以下模板：

(deftemplate user  (slot id (type INTEGER))  (slot firstname (type STRING))  (slot lastname (type STRING))  (slot username (type STRING))  (slot average (type FLOAT))  )

我想从事实中获取用户名值，并检查是否有两个事实具有相同的用户名但不同的平均值。例如，如果我们有：

(assert user (id 1) (firstname 'Mike') (lastname 'Mikeson') (username 'mike') (average 70.00))(assert user (id 1) (firstname 'Mike') (lastname 'Mikeson') (username 'mike') (average 10.00))(assert user (id 2) (firstname 'John') (lastname 'Johnson') (username 'john') (average 90.00))

我会统计具有相同用户名的记录，比如’mike’，并检查第一个事实在平均值字段中是否与第二个事实具有相同的值。

我在网上搜索过，但关于CLIPS的信息很少

回答：

         CLIPS (6.4 2/9/21)CLIPS> (deftemplate user   (slot id (type INTEGER))   (slot firstname (type STRING))   (slot lastname (type STRING))   (slot username (type STRING))   (slot average (type FLOAT)))CLIPS>   (deffacts users   (user (id 1) (firstname "Mike") (lastname "Mikeson") (username "mike") (average 70.00))   (user (id 1) (firstname "Mike") (lastname "Mikeson") (username "mike") (average 10.00))   (user (id 2) (firstname "John") (lastname "Johnson") (username "john") (average 90.00)))CLIPS>     (defrule different-averages    (user (username ?un) (average ?avg1))    (user (username ?un) (average ?avg2&:(> ?avg2 ?avg1)))    =>    (println "User " ?un " has averages " ?avg1 " and " ?avg2 "."))CLIPS> (reset)CLIPS> (run)User mike has averages 10.0 and 70.0.CLIPS>