#include "library.h"

void main()
{ const double a = 1;
  const double b = 8;
  const double c = 6;
  cout << "Solving " << a << "*x*x + " 
	                 << b << "*x + " 
					 << c << " = 0\n";
  const double x1 = (-b + sqrt(b*b - 4*a*c)) / (2*a);
  const double x2 = (-b - sqrt(b*b - 4*a*c)) / (2*a);
  cout << "solution 1: x = " << x1 << "\n";
  cout << "Solution 2: x = " << x2 << "\n";
  cout << a*x1*x1 + b*x1 + c << " should be zero\n";
  cout << a*x2*x2 + b*x2 + c << " should be zero\n"; }