p61

#include <cmath>
#include <iostream>
#include <iomanip>
using namespace std;

double f (double x, double eps, int& n)
{
    double step = 1;
    double s = 0;
    int k=1;
    int fact=1;
    int t = -1;
    while (fabs(step)>=eps)
    {
        s += step;
	fact *= (2*k+2)*(2*k+3);
        step *= t*x*x/fact;
        n ++;
        k ++;
        t = -t;
    }
    return s;
}

int main (void)
{
    double eps;
    double a = 0.0;
    const double b = 1.0;
    const double h = 0.1;
    cin >> eps;
    int i = 1;
    cout << "No\t x \t F(x) \t count\n";
    for (; a<= b; a += h)
    {
        int n = 0;
        double fx = f(a, eps, n);
	cout <<setw(3) << i << " \t" << setw(5) << a << "\t" << setw(10) << fx << "\t" << n << endl;
        i++;
    }
}