#include <iostream>
#include <math.h>
#include <iomanip>
using namespace std;
typedef double(*uf)(double, double, int &);
void tabl(double, double, double, double, uf);
double y(double, double, int &);
double s(double, double, int &);
int main()
{
    cout << setw(8) << "x" << setw(15) << "y(x)" << setw(10) << "k" << endl;
    tabl(-2, 2, 0.25, 0.001, y);
    cout << endl;
    cout << setw(8) << "x" << setw(15) << "s(x)" << setw(10) << "k" << endl;
    tabl(-2, 2, 0.25, 0.001, s);
    return 0;
}
void tabl(double a, double b, double h, double eps, uf fun)
{
    int k = 0;

    double sum;
    for (double x = a; x<b + h / 2; x += h)
    {
        sum = fun(x, eps, k);
        cout << setw(8) << x << setw(15) << sum << setw(10) << k << endl;
    }
}
double y(double x, double eps, int &k)
{
    double pi = 3.14;
    return (pi*(pi - 2 * abs(x))) / 8;
}
double s(double x, double eps, int &k)
{
    double  c, sum;
    sum = c = x;
    k = 1;
    while (fabs(c) > eps)
    {

        c = cos((2 * k - 1)*x) / pow((2 * k - 1), 2);

        sum += c;
        k++;
    }
    return sum;
}