[LISP程序]：传两个程序上来看看，请不吝指正

KERRYWM

一个产生随机数的程序
(DEFUN RND(N1 N2)
  (SETQ RA 66791 RB 17 NN 30)
  (SETQ IMIN(EXPT 2 31) IMAX (1- IMIN))
  (IF (> N1 N2 )(SETQ N3 N1 N1 N2 N2 N3))
  (SETQ RN (ATOI (SUBSTR(RTOS (GETVAR "CDATE") 2 7)14)))
  (REPEAT NN
    (SETQ RN(+ (* RN RA) RB))
    (IF (MINUSP RN) (SETQ RN(- RN IMIN)))
    )
  (SETQ RN(REM RN IMAX))
  (SETQ RN(/ RN IMAX 1.0))
  (SETQ RN (+ (FIX (* RN (1+ (- N2 N1)))) N1))
  )
下面这个程序，那就你们自己看吧！
(DEFUN C:GEY()
  (VL-LOAD-COM)
  (SETQ ADD(VLAX-GET-ACAD-OBJECT))
  (SETQ ADT(VLA-GET-ACTIVEDOCUMENT ADD))
  (SETQ MSPACE(VLA-GET-MODELSPACE ADT))
  (SETQ BASEPNT(VLAX-3D-POINT (LIST 30 30 0)))
  (SETQ SECONDPNT(VLAX-3D-POINT (LIST 10 30 0)))
  (SETQ RAYOBJ(VLA-ADDRAY MSPACE BASEPNT SECONDPNT))
  (SETQ PNTS(VLAX-MAKE-SAFEARRAY VLAX-VBDOUBLE '(0 . 5)))
  (VLAX-SAFEARRAY-FILL PNTS '(30 70 90 20 30 50))
  (SETQ PLINEOBJ(VLA-ADDLIGHTWEIGHTPOLYLINE MSPACE PNTS))
  (VLA-PUT-CLOSED PLINEOBJ :VLAX-TRUE)
  (SETQ STARTPNT(VLAX-3D-POINT (LIST 0 0 0)))
  (SETQ ENDPNT(VLAX-3D-POINT (LIST 20 20 0)))
  (SETQ LINEOBJ(VLA-ADDLINE MSPACE STARTPNT ENDPNT))
  (SETQ CENTERPNT(VLAX-MAKE-SAFEARRAY VLAX-VBDOUBLE '(0 . 2)))
  (VLAX-SAFEARRAY-FILL CENTERPNT '(20 30 0))
  (SETQ RADIUS 30)
  (SETQ CIRCLEOBJ(VLA-ADDCIRCLE MSPACE CENTERPNT RADIUS))
  (SETQ CENTER(VLAX-MAKE-SAFEARRAY VLAX-VBDOUBLE '(0 . 2)))
  (VLAX-SAFEARRAY-FILL CENTER '(50 50 0))
  (SETQ MAJAXIS(VLAX-MAKE-SAFEARRAY VLAX-VBDOUBLE '(0 . 2)))
  (VLAX-SAFEARRAY-FILL MAJAXIS '(100 200 0))
  (SETQ RADRATIO 0.3)
  (SETQ ELLOBJ(VLA-ADDELLIPSE MSPACE CENTER MAJAXIS RADRATIO))
  (VLA-ZOOMEXTENTS ADD)
  (SETQ UTILITY(VLA-GET-UTILITY ADT))
  (SETQ CATCHIT (VL-CATCH-ALL-APPLY 'VLA-GETENTITY (LIST UTILITY 'RETURNOBJ 'BASEPNT "PLEASE SELECT AN OBJECT")))
  (IF (VL-CATCH-ALL-ERROR-P CATCHIT)
    (PROGN
      (PRINC "BYE-BYE!")
      (PRINC "GETENTITY SAMPLE")
      )
    (PROGN
      (VLA-PUT-COLOR RETURNOBJ ACRED)
      (VLA-UPDATE RETURNOBJ)
      (PRINC "OBJECT TYPE IS:")
      (PRINC (VLA-GET-OBJECTNAME RETURNOBJ))
      (PRINC "\nGETENTITY SAMPLE")
      (VLA-PUT-COLOR RETURNOBJ ACBYLAYER)
      (VLA-UPDATE RETURNOBJ))
    )
  (PRINC)
  )

zml84

不明白，第一个程序绕来绕去，而结果只是得到一个随机数，是乎不太值得。

m123456

看不懂哟

cooltl18

有点晕

mcc-penbo

晕！