数值分析，利用牛顿法、插值法、二分法、弦截法、史蒂芬森法求取非线性方程的根，运行时可选择任一方法进行求解方程，验证后完全可行-Numerical analysis, using Newton' s method, interpolation, dichotomy, Secant Method, Stephenson law to strike roots of nonlinear equations, you can choose any of the methods for solvin