二分法求一元二次方程的根

//二分法求方程的根#include<iostream>#include<cmath>double EPS=1e-6;double f(double x){ return  x*x*x-5*x*x+10*x-80; }int main(){double root,x1=0,x2=100,y;root=x1+(x2-x1)/2;int triedTimes =1;y=f(root);while(fabs(y)>EPS){if(y>0) x2=root;else    x1=root;root=x1+(x2-x1)/2;y=f(root);triedTimes ++;}printf("%.8f\n",root);printf("%d",triedTimes);return 0;}