二分法求一个未知数方程的根f(x)=0,x属于[a,b],除了显示每次计算的小区间外，还根据给定的精度计算了所需的次数k-Dichotomy for the root of an unknown equation f (x) = 0, x belonging to [a, b], apart from showing the outline of each inter-cell calculation, but also in acco