#include "stdafx.h"
#include <iostream>
#include <cmath>
using namespace std;
void tabl(double *, double *, double *);
double sum(double *, double *, int *);

int main1()
{
    double a = -0.9, b = 0.9, eps = 0.0001;
    cout << "\t\t" << "x" << "\t\t" << "F(x)" << "\t\t\t" << "sum" << "\t\t\t" << "n" << endl;
    tabl(&a,&b,&eps);
    system("pause");
    return 0;
}

void tabl(double *a, double *b, double *eps)
{
    int n=0;
    for (double x = *a; x < *b; x += (*b - *a) / 10)
    {
        cout << "\t\t" << x << "\t\t" << cos(x - 4) << "\t\t" << sum(&x, eps, &n);
        cout << "\t\t" << n << endl;
    }
}

double sum(double *x, double *eps, int *n)
{
    double s = 0, chis = 1, znam = 1;
    *n = 0;
    while (fabs(chis/znam)>*eps)
    {
        s += chis / znam;
        *n += 1;
        chis *= (-(4 - *x)*(4 - *x));
        znam *= 2 * (*n)*(2 * (*n) - 1);

    }
    return s;
}