lab3_n2fordima

#include<math.h>
#include<iostream>
#define pi acos(-1.0)
using namespace std;
int main()
{
    setlocale(LC_ALL, "RUS");
    double x, b, h, a, y, i, s0, s1, e, p, s, z;
    e = 0.0001;
    b = pi;
    h = pi / 25;
    a = pi / 5;
    i = 1;
    x = a;
    s = 0;
    z = 0;
    for (x = a; x <= b; x = x + h)
    {
        s = 0;
        i = 1;
        z++;
        //cout << "итерация for " << z << "\n";
        s0 = (pow(-1, i) * cos(i * x)) / (i * i);
        s1 = (pow(-1, (i + 1)) * cos((i + 1) * (x))) / ((i + 1) * (i + 1));
        while (fabs(s1-s0) >= e)
        {
            //cout << "итерация while " << i << "\n";
            s0 = (pow(-1, i) * cos(i * x)) / (i * i);
            s1 = (pow(-1, (i + 1)) * cos((i + 1) * (x))) / ((i + 1) * (i + 1));
            i++;
            //p = fabs(s0 - y);
            s = s + s0;
            //cout << "|s1-s0|=" << fabs(s1 - s0)<<"\n";
            //cout << "|s0-y|=" << p << "\n";
        }
        y = (((x * x) - ((pi * pi) / 3))/4);
        cout << "y=" << y << "   s=" << s << "\n";
        //cout << "s=" << s << "\n";

    }
    return 0;
}