算术运算在我们普通的计算机上很容易实现！但是在我们的DSP上，由于其没有相对应的程序支持，实现就比较麻烦！那么究竟该怎么做呢！就看看吧！-The arithmetic operation is very easy on our ordinary computer to　realize!　But on ours DSP, because it has not corresponded the　procedure support, the realization quite is troublesome!　Actually　then should how do!　Has a look!