测验应用：验证正确的答案

Question

我正在构建测验应用程序，但无法验证用户答案是否正确。测验包含10个问题，并使用单选按钮从用户那里获得答案。对于某些问题，没有一个答案注册为正确，而对于其他一些问题，所有答案都注册为正确。

每个问题都有自己的'questionClass'，如下所示：

function questionClass (q, a1, a2, a3, a4, n, c) {
this.question = q;
this.answer1 = a1;
this.answer2 = a2;
this.answer3 = a3;
this.answer4 = a4;
this.number = n;
this.correct = c;

每个问题类都使用以下公式创建：

var questionOne = new questionClass("quotation to be analyzed", 'answer1','answer2','answer3','answer4', number, 'correct');
questions.push(questionOne);

验证用户是否得到正确答案的功能如下：

    this.checkAnswer=checkAnswer;
    function checkAnswer() {

    if ($('input:radio[name=" ' + this.number + ' "]:checked').val() == this.correct) {
        score++;
    }
    else if ($('input:radio[name=" ' + this.number + ' "]:checked').val() == this.correct) {
        score++;
    }
    else if ($('input[id=" ' + this.answer3 + ' "]:checked') && (this.answer3 == this.correct)) {
        score++;
    }
    else if ($('input[id=" ' + this.answer4 + ' "]:checked') && (this.answer4 == this.correct)) {
        score++;
    }
    else {
        console.log("you got the wrong answer");
    }

}

在问题之间移动的功能如下：

$("#continue").click(function(){
    counter++;

    if (counter == 1) {
        questions[x].display();
    }
    else if ((counter >= 1) && (counter <= 10)) {
        if (questions[x].isSelected()) {
            $('.warning').html("");
            questions[x].checkAnswer();
            $('.score').html("<p>Your score is " + score + " out of 10</p>");
            x++;
                if (x < 10){
                    questions[x].display();
                }
        }
    }
    else if ((counter >= 11) && (!questions[x].isSelected())) {
        return;
    }
    else {
        $('.warning').html("");
        questions[x].checkAnswer();
        $('.score').empty();
        $('#container').html('<h1>You scored ' + score + ' out of 10.</h1></br>');
        $('#container').append('<input type="button" id="tryAgain" value="Try Again!">');

    }
});

可以在以下链接查看该应用程序：

http://dl.dropboxusercontent.com/u/91499081/QuizApp/quizApp.html

小提琴http://jsfiddle.net/MCjna/