#include <bits/stdc++.h>
using namespace std;
double f(double x){return x*x*x - 4;}
int main(){
    double x1=1,x2=3,x0,f1,f2,f0,E=1e-8;
    f1=f(x1); f2=f(x2);
    cout<<"Iter\t x1\t\t x2\t\t x0\t\t f1\t\t f2\t\t f0\n";
    for(int i=1;i<=3;i++){
        x0=x1-(f1*(x2-x1))/(f2-f1); f0=f(x0);
        cout<<i<<"\t"<<x1<<"\t"<<x2<<"\t"<<x0<<"\t"<<f1<<"\t"<<f2<<"\t"<<f0<<"\n";
        if(f1*f0<0) x2=x0; else x1=x0;
        f1=f(x1); f2=f(x2);
    }
}

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MwotNg==

3
-6