#include "library.h"

double ask(const string question)
{ print(question);
  return read_double(); }

void main()
{ const double A = ask("Enter A: ");
  const double B = ask("Enter B: ");
  const double C = ask("Enter C: ");

  const double disc = B*B - 4*A*C;

  if (disc < 0)
    print("There is no solution\n");

  if (disc == 0)
  { const double x = -B / (2*A);
    print("x = ");
    print(x);
    new_line();
    
    print("This should be almost zero: ");
    print(A*x*x + B*x + C);
    new_line(); }

  if (disc > 0)
  { const double x1 = (-B - sqrt(disc)) / (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(disc)) / (2*A);
    print("x2 = ");
    print(x2);
    new_line();

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