// Get Programming with JavaScript

// Listings 13.03, 13.04 and 13.15

// Using the Number Generator with the quiz app

​

var getQuiz = function () {

  var qIndex = 0;

  var questions = [

    { question: "7 x 8", answer: "56" },

    { question: "12 x 12", answer: "144" },

    { question: "5 x 6", answer: "30" },

    { question: "9 x 3", answer: "27" }

  ];

  var getQuestion = function () {

    qIndex = between(0, questions.length - 1);

    return questions[qIndex].question;

  };

  var checkAnswer = function (userAnswer) {

    if (userAnswer === questions[qIndex].answer) {

      return "Correct!";

    } else {

      return "No, the answer is " + questions[qIndex].answer;

    }

};

  return {

    quizMe: getQuestion,

    submit: checkAnswer

  };

};

​

var quiz = getQuiz();

​

​

​

​

/* Further Adventures

 *

 * 1) Run the program.

 *

 * 2) Take the quiz, using the quiz.quizMe and

 *    quiz.submit methods.

 *    

 *    > quiz.quizMe()

 *      12 x 12

 *    > quiz.submit("144")

 *

 * 3) Add some more questions and answers, run the

 *    program and take the quiz again.

 *

 * 4) Update the program so that it keeps

 *    a score of correct answers.

 *

 * 5) Define a showScore function that displays

 *    the current score.

 *

 */