Function expr

[YANG Liqun]

Hi, netters.
I want a function which can evaluate an expression and return the result, like
command expr.
I cannot find such a function in libc or other lib on BSD 4.3.
Any suggestion will be appreciated.
Please reply in e-mail.
---
Yang
--
-------------------------------------------------------------------------------
|		Yang Li-qun                                                   |
|		OE, OMRON Corporation                                         |
|		20, Igadera Shimokaiinji Nagaokakyo-City                      |
|		Kyoto 617 Japan                                               |
|		Tel: 075-951-5111  Fax: 075-956-7403                          |
|  		E-mail:yang at nff.ncl.omron.co.jp                               |
-------------------------------------------------------------------------------