#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
float fun(float x, float e, int &n)
{
	float s = 0, a = (x - 1);
	n = 0;
	while (fabs(a)>=e)
	{
		s += a;
		a *= -pow(x - 1, 2) / 2;
		n++;
	}
	return s;
}
int main()
{
	float a, b, e, h, f, x;
	cout << "a="; cin >> a;
	cout << "b="; cin >> b;
	cout << "e="; cin >> e;
	cout << "h="; cin >> h;
	int n, i;
	cout << setprecision(3);
	cout << "i\t x\t f(x)\t n\n";
	for (x = a, i = 2; x <= b; x += h, i++)
	{
		f = fun(x, e, n);
		cout << i << "\t" << x << "\t" << f << "\t" << n << endl;
	}
	system("pause");
		return 0;
}