AutoLisp英寸转米

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(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)
)