二分法的基本思想是通过计算隔根区间的中点，逐步缩小隔根区间，从而可以得到方程的近似值-The basic idea of dichotomy is separated by calculating the midpoint of the root zone, gradually narrowing the range across the root, so you can get an approximation of equation

里面有各种查找 顺序查找 二分法 分块查找-Find sub-block difference