自编程序：将图形坐标输出到一个文件。

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为加一分，将自编程序：将图形坐标输出到一个文件的LISP程序与大家共享。
;;;                PC_PT.LSP
;;;               ----------
  
(DEFUN CC_PT()
    (SETQ OLD_O (GETVAR "OSMODE"))
    (SETVAR "OSMODE" 0)
    (SETQ FF (OPEN "FILE_PT.TXT" "w"))
    (SETQ A (GETREAL "\n 请输入图纸比例 1: "))
    (IF (/= A 1)
        (PROGN
            (SETQ B (/ 1.0 A))
            (COMMAND "SCALE" "ALL" "" '(0 0) B)
        )
    )
    (PROMPT "\n 请选择工作区域： ")
    (COMMAND "ZOOM" "D" PAUSE PAUSE PAUSE NIL )
    (SETQ BB (GETPOINT "\n 请选择工件的坐标原点："))
    (COMMAND "UCS" "O" BB)
    (COMMAND "LAYER" "N" "TEXT_PT" "S" "TEXT_PT" "C" 2 "" "")
    (COMMAND "TEXT" '(0 0) "2" "" "(0,0)")
    (SETQ FLAG (ENTLAST))
  
;;; 直线或圆弧的端点选择程序
    (SETQ I 0  N 1)
    (SETVAR "OSMODE" 1)
    (WHILE N
       (SETQ I (1+ I)   J (ITOA I))
       (SETQ PT (GETPOINT "\n 请顺序选择控制端点："))
       (SETQ TE (STRCAT "T" J ))
       (COMMAND "TEXT" PT "2" "" TE)
       (SETQ TF (STRCAT " " TE "  ---- "))
       (PRIN1 TF FF)
       (PRIN1 PT  FF )
       (PRINC "\n" FF)
       (SETQ AA (GETSTRING "\n 是否继续(Y/N) ?"))
       (IF (= (STRCASE AA) "N")
           (PROGN
               (CLOSE FF)
               (SETQ N NIL)
           )
       )
     )
  
;;; 园弧中心选择程序
     (SETQ CC (GETSTRING "\n 您是否需要园弧的中心坐标(Y/N) ?"))
     (IF (/= (STRCASE CC) "N")
         (PROGN
            (SETQ N 1  I 0)
            (SETVAR "OSMODE" 4)
            (SETQ FF (OPEN "FILE_PT.TXT" "a"))
            (PROMPT "\n 请选择工作区域")
            (COMMAND "ZOOM" "D" PAUSE PAUSE PAUSE NIL)
            (WHILE N
               (SETQ I (1+ I)  J (ITOA I))
               (SETQ PT (GETPOINT "\n 请顺序选择园弧 :"))
               (SETQ TE (STRCAT "C" J ))
               (COMMAND "TEXT" PT "2" "" TE)
               (SETQ TF (STRCAT " " TE " ---- "))
               (PRIN1 TF FF)
               (PRIN1 PT FF )
               (PRINC "\n" FF)
               (SETQ AA (GETSTRING "\n 是否继续(Y/N) ?"))
               (IF (= (STRCASE AA) "N")
                   (PROGN
                      (CLOSE FF)
                      (SETQ N NIL)
                   )
               )
             )
         )
     )
     (COMMAND "UCS" "" NIL)
     (IF (/= A 1)
         (COMMAND "SCALE" "ALL" "" '(0 0) A)
     )
     (COMMAND "ZOOM" "D" PAUSE PAUSE PAUSE NIL )
     (SETVAR "OSMODE" OLD_O)
  
;;; 标识高度改变程序
     (SETQ EE (GETSTRING "\n 您是否想改变标识的高度(Y/N) ?"))
     (IF (/= (STRCASE EE) "N")
         (PROGN
           (SETQ HH (GETREAL "\n 请输入您希望的高度:"))
           (SETQ EH (CONS 40 HH))
           (WHILE FLAG
                (SETQ ES_1 (ENTGET FLAG))
                (SETQ OLD_H (ASSOC 40 ES_1))
                (SETQ ES_2 (SUBST EH OLD_H ES_1))
                (ENTMOD ES_2)
                (SETQ FLAG (ENTNEXT FLAG))
            )
         )
     )
)

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