import java.util.ArrayList;
import java.util.Scanner;

/**
   A quiz contains a list of questions.
*/
public class Quiz
{
   private ArrayList<Question> questions;
   
   /**
      Constructs a quiz with no questions.
   */
   public Quiz()
   {
      questions = new ArrayList<Question>();
   }

   /**
      Adds a question to this quiz.
      @param q the question
   */
   public void addQuestion(Question q)
   {
      questions.add(q);
   }

   /**
      Presents the questions to the user and checks the response.
   */
   public void presentQuestions()
   {
      Scanner in = new Scanner(System.in);

      for (Question q : questions)
      {
         q.display();
         System.out.print("Your answer: ");
         String response = in.nextLine();
         System.out.println(q.checkAnswer(response));
      }
   }
}