# include <iostream>
# include <fstream>
# include <sstream>
# include <string>
# include <istream>
# include <stdio.h>
# include <math.h>
# include <stdlib.h>

using namespace std;

float funzi (float x) {

return (sin(x)+2);

int main();
 {
	float x,xp;
	float fprec;
	fprec = 0.01;
	cout<<"inserisci il valore iniziale di x"<<endl;
	cin>>x;
	do {
	   xp=x;
	   x=funzi (xp);
	   cout<<x<<endl;

 }
    while (fabs((x*xp)/xp)<fprec);
	cout<<x;
	cout<<"il valore di precisione è questo"<<endl;
	return (0);}
}