#include "library.h"

void main()
{ const double A = 1;
  const double B = -7;
  const double C = 3;

  const double x1 = (-B - sqrt(B*B - 4*A*C)) / (2*A);

  print("x1 = ");
  print(x1);
  new_line();

  print("This should be almost zero: ");
  print(A*x1*x1 + B*x1 + C);
  new_line();

  const double x2 = (-B + sqrt(B*B - 4*A*C)) / (2*A);
  print("x2 = ");
  print(x2);
  new_line();

  print("This should be almost zero: ");
  print(A*x2*x2 + B*x2 + C);
  new_line(); }