#include "library.h"

void solve_quadratic(double a, double b, double c)
{ const double det = b*b - 4*a*c;
  if (det < 0)
    print("no solutions");
  else if (det == 0)
  { print("solution is ");
    print(-b / (2*a)); }
  else
  { const double sqrtdet = sqrt(det);
    print("solution one is ");
    print((-b - sqrtdet) / (2*a));
    new_line();
    print("solution two is ");
    print((-b + sqrtdet) / (2*a)); }
  new_line(); }

void test_once()
{ print("Enter A ");
  const double a = read_double();
  print("Enter B ");
  const double b = read_double();
  print("Enter C ");
  const double c = read_double();
  solve_quadratic(a, b, c); }

void many_tests()
{ test_once();
  print("do you want another test (y for yes)? ");
  const string reply = read_string();
  if (reply == "y")
    many_tests(); }

void main()
{ many_tests(); }