#!/usr/local/bin/tcc -run
#include <stdio.h>
#include <math.h>
#define eps 1.0e-15

double f(double x)
{
	return x*x*x-2.0*x*x+2.0;
}

int main()
{
	int n=0;
	double x0=-2.0,x1=-1.8,x2,f0,f1,diff;

	do{
		f1=f(x1);f0=f(x0);
		x2=x1-f1*(x1-x0)/(f1-f0);
		diff=fabs(f(x2));
		x0=x1; x1=x2;
		printf("%25.15e   %10.3e  \n",x1,diff);
	}while(diff>=eps);
	printf("%25.15e   %10.3e  \n",x1,diff);
}