;;###################################################
;;###################################################
;;                  RX7.CLP                        ##
;;    Mazda RX-7 rotary engine troubleshooter.     ##
;;                                                 ##
;;###################################################
;;###################################################
;;
;; Operating instructions:
;;   1.) Execute the CLIPS interpreter.
;;   2.) From the CLIPS prompt, type (load "rx7.clp").
;;   3.) Type (reset) and then (run) to execute the program.
;;
;;**********************************
;; Set up initial facts for testing.
;;**********************************
;;
(deffacts init
  (troubleshoot-mode engine)
  (menu-level engine main))
;;
;;****************************************************
;; Clear the screen and present the main menu.       *
;;                                                   *
;; Variables:                                        *
;;   ?ml - used for retracting the menu level.       *
;;   ?response - used for binding in the users input.*
;;****************************************************
;;
(defrule main-menu
  (declare (salience 500))
  (troubleshoot-mode engine)
  ?ml <- (menu-level engine main)
=>
  (retract ?ml)
;;** print 25 crlf's to clear screen **
  (printout t crlf crlf crlf)
  (printout t
  "        Choose one of the problem areas listed below" crlf
  "        by typing a letter and pressing the return key." crlf crlf
  "                  1.) Difficult starting." crlf
  "                  2.) Poor idling." crlf
  "                  3.) Insufficient power." crlf
  "                  4.) Abnormal combustion." crlf
  "                  5.) Excessive oil consumption." crlf
  "                  6.) Engine noise." crlf
  "                  7.) Quit the program." crlf crlf
  "        Choice: " )
  (bind ?response (read))
  (assert (problem-response engine ?response))
  (printout t crlf))
;;
;;
;;***************************************
;; If the user enters a response of 7   *
;;    from the main menu,               *
;; Then print ending message and clear  *
;;      the fact base.                  *
;;***************************************
(defrule user-quits
  (troubleshoot-mode engine)
  (problem-response engine 7)
=>
  (printout t "You have QUIT the program." crlf)
  (halt))
;;
;;*******************************
;; If the user selects 1        *
;; Then assert that the problem *
;;      is DIFFICULT STARTING.  *
;;                              *
;; Variables:                   *
;;   ?pr - for retracting the   *
;;         numeric problem      *
;;         response.            *
;;*******************************
(defrule difficult-starting
  (troubleshoot-mode engine)
  ?pr <- (problem-response engine 1)
=>
  (retract ?pr)
  (assert (menu-level engine possible-causes-1-1))
  (assert (problem engine difficult-starting)))
;;
;;*******************************
;; If the user selects 2        *
;; Then assert that the problem *
;;      is POOR IDLING.         *
;;                              *
;; Variables:                   *
;;   ?pr - for retracting the   *
;;         numeric problem      *
;;         response.            *
;;*******************************
(defrule poor-idling
  (troubleshoot-mode engine)
  ?pr <- (problem-response engine 2)
=>
  (retract ?pr)
  (assert (menu-level engine possible-causes-1-1))
  (assert (problem engine poor-idling)))
;;
;;*******************************
;; If the user selects 3        *
;; Then assert that the problem *
;;      is INSUFFICIENT POWER.  *
;;                              *
;; Variables:                   *
;;   ?pr - for retracting the   *
;;         numeric problem      *
;;         response.            *
;;*******************************
(defrule insufficient-power
  (troubleshoot-mode engine)
  ?pr <- (problem-response engine 3)
=>
  (retract ?pr)
  (assert (menu-level engine possible-causes-1-1))
  (assert (problem engine insufficient-power)))
;;
;;*******************************
;; If the user selects 4        *
;; Then assert that the problem *
;;      is ABNORMAL COMBUSTION. *
;;                              *
;; Variables:                   *
;;   ?pr - for retracting the   *
;;         numeric problem      *
;;         response.            *
;;*******************************
(defrule abnormal-combustion
  (troubleshoot-mode engine)
  ?pr <- (problem-response engine 4)
=>
  (retract ?pr)
  (assert (menu-level engine possible-causes-1-2))
  (assert (problem engine abnormal-combustion)))
;;
;;*************************************
;; If the user selects 5              *
;; Then assert that the problem       *
;;      is EXCESSIVE OIL CONSUMPTION. *
;;                              *
;; Variables:                   *
;;   ?pr - for retracting the   *
;;         numeric problem      *
;;         response.            *
;;*************************************
(defrule excessive-oil-consumption
  (troubleshoot-mode engine)
  ?pr <- (problem-response engine 5)
=>
  (retract ?pr)
  (assert (menu-level engine possible-causes-1-3))
  (assert (problem engine excessive-oil-consumption)))
;;
;;*******************************
;; If the user selects 6        *
;; Then assert that the problem *
;;      is ENGINE NOISE.        *
;;                              *
;; Variables:                   *
;;   ?pr - for retracting the   *
;;         numeric problem      *
;;         response.            *
;;*******************************
(defrule engine-noise
  (troubleshoot-mode engine)
  ?pr <- (problem-response engine 6)
=>
  (retract ?pr)
  (assert (menu-level engine possible-causes-1-4))
  (assert (problem engine engine-noise)))
;;
;;********************************************
;; Clear the screen and present the possible *
;; causes for DIFFICULT STARTING, or         *
;; POOR IDLING, or INSUFFICIENT POWER        *
;; depending on the variable ?problem.       *
;;                                           *
;; Variables:                                *
;;   ?problem - the problem selected by the  *
;;              user.                        *
;;   ?response - used for binding in the     *
;;               users input.                *
;;********************************************
;;
(defrule possible-causes-1-1
  (troubleshoot-mode engine)
  (menu-level engine possible-causes-1-1)
  (problem engine ?problem&difficult-starting|poor-idling|insufficient-power)
=>
  (printout t crlf crlf crlf)
  (printout t
  "        You selected " ?problem " as the problem you would" crlf
  "        like to solve.  If you change your mind and would like" crlf
  "        to review the main menu, press 0 now, otherwise select one" crlf
  "        of the possible causes of " ?problem " listed below."
            crlf crlf
  "               0.) Return to main menu." crlf
  "               1.) Insufficient compression." crlf
  "               2.) Malfunction of fuel system." crlf
  "               3.) Malfunction of electrical system." crlf crlf
  "        Choice: " )
  (bind ?response (read))
  (assert (possible-cause ?problem ?response))
  (printout t crlf))
;;
;;********************************************
;; Clear the screen and present the possible *
;; causes for ABNORMAL COMBUSTION.           *
;;                                           *
;; Variables:                                *
;;   ?response - used for binding in the     *
;;               users response.             *
;;********************************************
(defrule possible-causes-1-2
  (troubleshoot-mode engine)
  (menu-level engine possible-causes-1-2)
  (problem engine abnormal-combustion)
=>
  (printout t crlf crlf crlf)
  (printout t
  "        You selected abnormal-combustion as the problem you would" crlf
  "        like to solve.  If you change your mind and would like"    crlf
  "        to review the main menu, press 0 now, otherwise select one" crlf
  "        of the possible causes of abnormal-combustion listed below." 
  crlf crlf
  "                0.) Return to main menu." crlf
  "                1.) Malfunction in combustion chamber." crlf
  "                2.) Malfunction of fuel system." crlf
  "                3.) Malfunction of ignition system." crlf
  "        Choice: ")
  (bind ?response (read))
  (assert (possible-cause abnormal-combustion ?response))
  (printout t crlf))
;;
;;********************************************
;; Clear the screen and present the possible *
;; causes for EXCESSIVE OIL CONSUMPTION.     *
;;                                           *
;; Variables:                                *
;;   ?response - used for binding in the     *
;;               users response.             *
;;********************************************
(defrule possible-causes-1-3
  (troubleshoot-mode engine)
  (menu-level engine possible-causes-1-3)
  (problem engine excessive-oil-consumption)
=>
  (printout t crlf crlf crlf)
  (printout t
  "        You selected excessive-oil-consumption as the problem you" crlf
  "        would like to solve.  If you change your mind and would like" crlf
  "        to review the main menu, press 0 now, otherwise select one" crlf
  "        of the possible causes of excessive-oil-consumption listed below." 
  crlf crlf
  "                0.) Return to main menu." crlf
  "                1.) Leakage into combustion chamber." crlf
  "                2.) Leakage into coolant passages." crlf
  "                3.) Leakage to outside of engine." crlf
  "                4.) Malfunction of lubricating system." crlf
  "        Choice: ")
  (bind ?response (read))
  (assert (possible-cause excessive-oil-consumption ?response))
  (printout t crlf))
;;
;;********************************************
;; Clear the screen and present the possible *
;; causes for ENGINE NOISE.                  *
;;                                           *
;; Variables:                                *
;;   ?response - used for binding in the     *
;;               users response.             *
;;********************************************
(defrule possible-causes-1-4
  (troubleshoot-mode engine)
  (menu-level engine possible-causes-1-4)
  (problem engine engine-noise)
=>
  (printout t crlf crlf crlf)
  (printout t
  "        You selected engine-noise as the problem you would like" crlf
  "        to solve.  If you change your mind and would like to" crlf
  "        review the main menu, press 0 now, otherwise select one" crlf
  "        of the possible causes of engine-noise listed below." 
  crlf crlf