Newton-iteration-method.rar_newton

#include <iostream> #include "Newton_iteration.h" using namespace std; double fun(double x); double dfun(double x); int main(int argc, char** argv) { Result result; result = NewtonIterative(fun, dfun, 2.8, 20000, 1e-6); if (result.flag == true) cout << "迭代成功，结果为" << '\t' << result.x << endl; else cout << "迭代失败" <<endl; return 0; } double fun(double x)//solve "f(x)=0" { return x*x-7*x+12; } double dfun(double x)//f'(x) { return 2*x-7; }