示例：将英寸转换为米（AutoLISP）

此示例演示如何使用函数将用户指定的以英寸为单位的距离转换为米。cvunit

(defun C:I2M ( / eng_len metric_len eng metric)
  (princ "\nConverting inches to meters. ")
  (setq eng_len
  (getdist "\nEnter a distance in inches: "))
  (setq metric_len (cvunit eng_len "inches" "meters"))
  (setq eng (rtos eng_len 2 4)
           metric (rtos metric_len 2 4))
  (princ
    (strcat "\n\t" eng " inches = " metric " meters."))
 (princ)
)