Lab6B

#include <iostream>
#include <math.h>

using namespace std;

void output(double, double, double);
double func(double);
double sum(int, double, double);



int main()
{
    double a = 0.1, b = 0.9 , eps = 0.00001;

    output(a, b, eps);

    return 0;
}

void output(double a, double b, double eps)
{
    double h = (b - a) / 10;
    int p = 0;
    for (double x = a; x < b + h / 2; x += h)
    {
        cout << "x = " <<  x  << "  "<< "func = " << func(x) << "  " << "sum = " << sum(p, x, eps) << endl;
    }
    system("pause");
}

double func(double x)
{
    return cosh(x)*cosh(x);
}

double sum(int p, double x, double eps)
{
    double sum = 0;
    double temp = 0.5;
    for (p = 1; temp >= eps; p++)
    {
        temp *= (4*x*x)/(2*p*(2*p-1));
        sum += temp;
    }
    return sum;
 }