void Quiz::GiveQuestionTo(Student & s)
// postcondition: student s asked a question
{
  cout << endl << "Ok, " << s.Name() << " it's your turn" << endl;
  cout << "type answer after question " << endl;

  myQuestion.Create();
  if (! s.RespondTo(myQuestion))
  { cout << "try one more time" << endl;
    if (! s.RespondTo(myQuestion))
    {  cout << "correct answer is " << myQuestion.Answer() << endl;
    }
  }
}