5.4.19

#include <iostream>
#include <math.h>
#include <iomanip>
using namespace std;

double calc(int& n, double &xm1) {
    return (n % 2 == 0) ? -xm1 / n : xm1 / n;
}
int main() {
    setlocale(LC_ALL, "Russian");
    int n = 1, precision = 0;
    const double h = 0.1, a = 0.5, b = 1.5;
    double x = a, e = 0, fx, s = 0, xm1;
    while (e <= 0) {
        cout << "Введите значение e (e > 0): ";
        cin >> e;
    }
    precision = -((int)log10(e) - 1); // Установка точности для вывода
    e = pow(10, -precision) / 2.000000000000001; // Упрощение E (0.008 -> 0.001 -> 0.000499..9)

    cout << "  №          X           Fx   n\n";
    while (x <= b + h) {
        xm1 = x - 1;
        s = 0;
        int ns = 10;
        fx = e + 1;
        do{
            xm1 *= x - 1;
            fx = calc(ns, xm1);
            s += fx;
            ns++;
        }while (abs(fx) > e);

        cout << setw(3) << n
            << setw(11) << right << fixed << setprecision(1) << x
            << setw(13) << right << fixed << setprecision(precision) << s
            << setw(4) << ns << endl;
        x += h;
        n++;
    }
    return 0;
}