lab3_n1.2

#include<math.h>
#include<iostream>
#define pi acos(-1.0)
using namespace std;
int main()
{
    setlocale(LC_ALL, "RUS");
    double x, s, y, a, b, h, i, d, f, comp, g;
    cout << "x="; cin >> x;
    b = pi;
    h = pi / 25;
    a = pi / 5;
    y = ((x * x) - ((pi * pi) / 3));
    i = 1;
    s = 0;
    while(i<999)
    {
        s += (pow(-1, i) * cos(i * x)) / (i * i);
        i++;
    }
    comp = 1;
    d = s;
    f = 1;
    g = 1;
    while (d != 0 and f != 0)
    {
        d = fmod(d, 1);
        f = fmod(d, 1);
        d = f * 10;
        g = int(d);
        comp *= g;
    }
    if (comp < 0)
    {
        comp *= -1;
    }
    cout << "Произведение цифр числа=" << comp<<"\n";
    cout << "d=" << d << "\n";
    cout << "s=" << s;
    return 0;
}