#include <fstream>
#include <iostream>
#include <iomanip>
#include <cmath>
#include <vector>

using namespace std;

void f(float a, float b, float c)	{
	float e = 0.000001;
	ofstream out("output.txt");
	vector<float> vx, vn, vs;
	int count = 0;

	for (float x = a; x <= b; x += c)	{
		float slag = (7 * x);
		int k = 1;
		float res = slag;
		int deg = 1;
		while (abs(slag) >= e)	{
			deg = 2 * k + 1;
			slag *= -(49 * x * x);
			slag /= (deg * (deg - 1));
			k++;
			res += slag;
		}
		vx.push_back(x);
		vs.push_back(res);
		vn.push_back(k);
		count++;
	}

	//*************НАЧАЛО ВТОРОГО ЗАДАНИЯ******************

	out << "x = ";
	for (int i = 0; i < count; i++)
		out << setw(10) <<	vx[i];
	out << endl;

	out << "n = ";
	for (int i = 0; i < count; i++)
		out << setw(10) <<	vn[i];
	out << endl;

	out << "f = ";
	for (int i = 0; i < count; i++)
		out << setw(10) <<	vs[i];
	out << endl;

	vector<float> vnx, vns;

	for (int i = 0; i < count; i++)	{
		vnx.push_back(vx[i]);
		if(vx[i] != vx[count - 1])
			vnx.push_back((vx[i] + vx[i + 1]) / 2);
	}

	for (int i = 0; i < count; i++)	{
		vns.push_back(vs[i]);
		if(vs[i] != vs[count - 1])
			vns.push_back((vs[i] + vs[i + 1]) / 2);
	}
	out << "x = ";
	for (int i = 0; i < count * 2 - 1; i++)
		out << setw(10) <<	vnx[i];
	out << endl;

	out << "g1 = ";
	for (int i = 0; i < count * 2 - 1; i++)
		out << setw(10) <<	vns[i];
	out << endl;

	//**********НАЧАЛО 3 ЗАДАНИЯ*************
	vector<float> v2s;

	for (int i = 0; i < count * 2 - 1; i++)	{
		v2s.push_back(vs[i]);
		float chis = 1, znam = 1;
		float L = 0;
		if(vx[i] != vx[count - 1])	{
			for (int j = 0; j < count; j++)
				chis *= (vnx[i + 1] - vx[i]
			v2s.push_back((vx[i] + vx[i + 1]) / 2);
	}
	out.close();
}

int main()	{

	float a, b;
	float c;

	cout	<<	"a = ";
	cin	>>	a;
	cout	<<	"b = ";
	cin	>>	b;
	cout	<<	"c = ";
	cin	>>	c;

	f(a,b,c);
	system("PAUSE");
	return 0;
}