#include <iostream>
#include <cmath>
#include <iomanip>

using namespace std;

long double fun(long double count, long double epsilon, long &interation)
{
    long i = 1;
    long double result = 0;
    while (true)
    {
        //long double temp = (pow(-1.0, i + 1) * pow(count, i - 1)) / pow(3.0, 1.0 / (i + 1));
        long double temp = ((i % 2 ? 1 : -1) * pow(count, i - 1)) / pow(3.0, 1.0 / (i + 1));
        i++;
        //temp += (pow(-1.0, i + 1) * pow(count, i - 1)) / pow(3.0, 1.0 / (i + 1));
        temp += ((i % 2 ? 1 : -1) * pow(count, i - 1)) / pow(3.0, 1.0 / (i + 1));
        if (abs(temp) < abs(epsilon))
            break;
        else
            result += temp;
        i++;
    }
    interation = i / 2 - 1;
    return result;
}

void view_top(int wight)
{
    cout << setfill('-') << right;
    wight++;
    cout << "*" << setw(wight) << "*" << setw(wight) << "*" << setw(wight) << "*" << endl;
}

void view_middle(int wight)
{
    cout << setfill('-') << right;
    wight++;
    cout << "*" << setw(wight) << "*" << setw(wight) << "*" << setw(wight) << "*" << endl;
}

void view_bottom(int wight)
{
    cout << setfill('-') << right;
    wight++;
    cout << "*" << setw(wight) << "*" << setw(wight) << "*" << setw(wight) << "*" << endl;
}

void view_field(int wight, const char field1[], const char field2[], const char field3[])
{
    cout << setfill(' ') << left;
    cout << "|" << setw(wight) << field1 << "|" << setw(wight) << field2 << "|" << setw(wight) << field3 << "|" << endl;
}

void view_field(int wight, long double field1, long double field2, long double field3)
{
    cout << fixed << setfill(' ') << left;
    cout << "|" << setw(wight) << field1 << "|" << setw(wight) << field2 << "|" << setw(wight) << field3 << "|" << endl;
}

int main()
{
    setlocale(LC_ALL, "Russian");
    const int str_wight = 16;
    long double StartBoard, FinishBoard, Step, Epsilon;
    cout << "Введите начало промежутка: ";
    cin >> StartBoard;
    cout << "Введите конец промежутка: ";
    cin >> FinishBoard;
    cout << "Введите шаг: ";
    cin >> Step;
    cout << "Введите Эпсилон: ";
    cin >> Epsilon;
    view_top(str_wight);
    view_field(str_wight,"Значение","Глубина итерации","Результат");
    view_middle(str_wight);
    for (long double count = StartBoard; count <= FinishBoard; count += Step)
    {
        long itr;
        long double temp = fun(count, Epsilon, itr);
        view_field(str_wight, count, itr, temp);
        //view_middle(str_wight);
    }
    view_bottom(str_wight);
    return 0;
}