本程序库中的开平方算法为快速逼近算法，它能达到牛顿迭代法同样的精度，而速度加快二十倍左右，超过双字节定点除法的速度。-The libraries in the open square algorithm for rapid approximation algorithm, it can achieve the Newton iteration method the same precision, and about twenty times faster, more than double byte fixed-point division speed.