// double precision floating point numbers
#include <iostream>
#include <math.h>
using namespace std;
double x1, x2, x3, x4, x5, x6;

int main()
{
  x1 = 6.022e23; // floating point constant assigned to x1
  x2 = 1.e300 * 1.e100; // overflow -> Nan, inf, etc.
  x3 = 1.e-300 / 1.e100; // underflow -> 0
  x4 = 1. + 1e-8; // -> 1.00000001 but will be displayed as 1
  x5 = (1. + 1e-8) -1.; // -> 1e-8, as expected
  x6 = (1. + 1e-16) -1.; // -> 0, due to machine precision error

  cout << x1 << ' ' << x2 << ' ' << x3  << ' ';
  cout << x4 << ' ' << x5 << ' ' << x6  << endl;
}