[求助]：rtos的消零问题

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请教：
在我的CAD中，当我在VLISP控制台中输入
(rtos 17.50 2 3)
求值后为什么返回值却是"17.5"，而不是"17.500"呢？
请问是哪里出错了？

Underway

system var.  Dimzin

Type: Integer
Saved in: Drawing
Initial value: 0

Controls the suppression of zeros in the primary unit value. DIMZIN stores this value when you enter it on the command line or set it under Primary Units in the Annotation dialog box. DIMZIN values 0–3 affect feet-and-inch dimensions only.


0 Suppresses zero feet and precisely zero inches

1 Includes zero feet and precisely zero inches

2 Includes zero feet and suppresses zero inches

3 Includes zero inches and suppresses zero feet

4 Suppresses leading zeros in decimal dimensions (for example, 0.5000 becomes .5000)

8 Suppresses trailing zeros in decimal dimensions (for example, 12.5000 becomes 12.5)

12 Suppresses both leading and trailing zeros (for example, 0.5000 becomes .5)


DIMZIN also affects real-to-string conversions performed by the AutoLISP rtos and angtos functions.