我正在尝试根据基于两个字段的比较器对 CLIPS 中的事实集合进行排序......
不幸的是，我无法理解为什么如果传递的两个事实中第一个字段相同，则比较器（显然是正确的）会打印 2。
我的比较器：
(deffunction MAIN::rating-sort (?f1 ?f2)
(printout t ?f1 crlf)
(printout t ?f2 crlf)
(printout t "f1-SC " (fact-slot-value ?f1 sum-certainties) crlf)
(printout t "f2-SC " (fact-slot-value ?f2 sum-certainties) crlf)
(printout t "f1-TP " (fact-slot-value ?f1 total-price) crlf)
(printout t "f2-TP " (fact-slot-value ?f2 total-price) crlf)
(if (< (fact-slot-value ?f1 sum-certainties) (fact-slot-value ?f2 sum-certainties)) then (printout t "1" crlf) return TRUE
else (if (> (fact-slot-value ?f1 sum-certainties) (fact-slot-value ?f2 sum-certainties)) then (printout t "2" crlf) return FALSE
else (if (> (fact-slot-value ?f1 total-price) (fact-slot-value ?f2 total-price)) then (printout t "3" crlf) return TRUE
else (if (< (fact-slot-value ?f1 total-price) (fact-slot-value ?f2 total-price)) then (printout t "4" crlf) return FALSE
else (printout t "5" crlf) return FALSE)))))
WM 的事实：
f-64 (alternative (hotels hotel4 hotel3 hotel2 hotel1) (times 1 0 0 0) (total-price 75.0) (certainty 14.0 -0.001 -0.001 -0.001) (sum-certainties 13.997) (flag TRUE))
f-66 (alternative (hotels hotel4 hotel3 hotel2 hotel1) (times 0 1 0 0) (total-price 100.0) (certainty -0.001 14.0 -0.001 -0.001) (sum-certainties 13.997) (flag TRUE))
f-68 (alternative (hotels hotel4 hotel3 hotel2 hotel1) (times 0 0 1 0) (total-price 75.0) (certainty -0.001 -0.001 14.0 -0.001) (sum-certainties 13.997) (flag TRUE))
f-70 (alternative (hotels hotel4 hotel3 hotel2 hotel1) (times 0 0 0 1) (total-price 100.0) (certainty -0.001 -0.001 -0.001 14.0) (sum-certainties 13.997) (flag TRUE))
我的比较器输出：
<Fact-64>
<Fact-66>
f1-SC 13.997
f2-SC 13.997
f1-TP 75.0
f2-TP 100.0
4
<Fact-68>
<Fact-70>
f1-SC 13.997
f2-SC 13.997
f1-TP 75.0
f2-TP 100.0
4
<Fact-64>
<Fact-68>
f1-SC 13.997
f2-SC 13.997
f1-TP 75.0
f2-TP 75.0
2
<Fact-66>
<Fact-68>
f1-SC 13.997
f2-SC 13.997
f1-TP 100.0
f2-TP 75.0
2
我不明白 13.997 怎么会大于 13.997。
谢谢大家。
你需要使用（返回真） and （返回假）在你的功能中而不是返回真 and 返回假，但即使进行此更改，代码也能正常工作。比较器从不打印 2。
CLIPS (6.31 6/12/19)
CLIPS>
(deffunction rating-sort (?f1 ?f2)
(printout t ?f1 crlf)
(printout t ?f2 crlf)
(printout t "f1-SC " (fact-slot-value ?f1 sum-certainties) crlf)
(printout t "f2-SC " (fact-slot-value ?f2 sum-certainties) crlf)
(printout t "f1-TP " (fact-slot-value ?f1 total-price) crlf)
(printout t "f2-TP " (fact-slot-value ?f2 total-price) crlf)
(if (< (fact-slot-value ?f1 sum-certainties) (fact-slot-value ?f2 sum-certainties))
then
(printout t "1" crlf) return TRUE
else
(if (> (fact-slot-value ?f1 sum-certainties) (fact-slot-value ?f2 sum-certainties))
then (printout t "2" crlf) return FALSE
else
(if (> (fact-slot-value ?f1 total-price) (fact-slot-value ?f2 total-price))
then (printout t "3" crlf) return TRUE
else
(if (< (fact-slot-value ?f1 total-price) (fact-slot-value ?f2 total-price))
then (printout t "4" crlf) return FALSE
else (printout t "5" crlf) return FALSE)))))
CLIPS>
(deftemplate alternative
(multislot hotels)
(multislot times)
(slot total-price)
(multislot certainty)
(slot sum-certainties)
(slot flag))
CLIPS>
(deffacts alternatives
(alternative (hotels hotel4 hotel3 hotel2 hotel1) (times 1 0 0 0)
(total-price 75.0) (certainty 14.0 -0.001 -0.001 -0.001)
(sum-certainties 13.997) (flag TRUE))
(alternative (hotels hotel4 hotel3 hotel2 hotel1) (times 0 1 0 0)
(total-price 100.0) (certainty -0.001 14.0 -0.001 -0.001)
(sum-certainties 13.997) (flag TRUE))
(alternative (hotels hotel4 hotel3 hotel2 hotel1) (times 0 0 1 0)
(total-price 75.0) (certainty -0.001 -0.001 14.0 -0.001)
(sum-certainties 13.997) (flag TRUE))
(alternative (hotels hotel4 hotel3 hotel2 hotel1) (times 0 0 0 1)
(total-price 100.0) (certainty -0.001 -0.001 -0.001 14.0)
(sum-certainties 13.997) (flag TRUE)))
CLIPS> (reset)
CLIPS> (sort rating-sort (find-all-facts ((?f alternative)) TRUE))
<Fact-1>
<Fact-2>
f1-SC 13.997
f2-SC 13.997
f1-TP 75.0
f2-TP 100.0
4
<Fact-3>
<Fact-4>
f1-SC 13.997
f2-SC 13.997
f1-TP 75.0
f2-TP 100.0
4
<Fact-1>
<Fact-3>
f1-SC 13.997
f2-SC 13.997
f1-TP 75.0
f2-TP 75.0
5
<Fact-2>
<Fact-3>
f1-SC 13.997
f2-SC 13.997
f1-TP 100.0
f2-TP 75.0
3
<Fact-2>
<Fact-4>
f1-SC 13.997
f2-SC 13.997
f1-TP 100.0
f2-TP 100.0
5
(<Fact-1> <Fact-3> <Fact-2> <Fact-4>)
CLIPS>
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系:hwhale#tublm.com(使用前将#替换为@)
