javascript中的错误总数

Question

I am trying to prepare online exam page using html and JavaScript where you can see code below : I have 2 problems: Problem 1: I want show the Timer to this online exam page code is below: a) where exam should complete on fixed time .If examiner is not able to complete the exam in time then he should get alert message about Time up and must show the last page of total for the problem 2 code which below of this Timer code. 我正在尝试使用html和JavaScript准备在线考试页面，您可以在下面看到代码：我有2个问题：问题1：我要在下面显示此在线考试页面代码的计时器：a）考试应在固定时间完成如果考官无法及时完成考试，则他应收到有关时间到的警告消息，并且必须显示此计时器代码下方的问题2代码的总计最后一页。

Timer Code:
var tim;
       var showscore=Math.round(correct/questions.length*100);
        var min = 1;
        var sec = 60;
        var f = new Date();
        function starttime() {
            showtime();
            document.getElementById("starttime").innerHTML = "<h4>You started your Exam at " + f.getHours() + ":" + f.getMinutes()+"</h4>"; 
        }
        function showtime() {
            if (parseInt(sec) > 0) {
                sec = parseInt(sec) - 1;
                document.getElementById("showtime").innerHTML = "Your Left Time is :"+min+" Minutes :" + sec+" Seconds";
                tim = setTimeout("showtime()", 1000);
            }
            else {
                if (parseInt(sec) == 0) {
                    min = parseInt(min) - 1;
            document.getElementById("showtime").innerHTML = "Your Left Time is :"+min+" Minutes :" + sec+" Seconds";
                    if (parseInt(min) == 0) {
                        clearTimeout(tim);
            alert("Time Up");


            /*_("test_status").innerHTML = "Test Completed";
            test.innerHTML = "<h2>You got "+correct+" of "+questions.length+" questions correct</h2>";
            test.innerHTML = "<h2>You got "+showscore +"% out of "+questions.length+"</h2>";
            test.innerHTML = "<button onclick='EndExam()'>End the Exam</button>";
            pos = 0;
            correct = 0;
            clearTimeout(tim);
            document.getElementById("endtime").innerHTML = "You Finished exam at Time is :"+min+" Minutes :" + sec+" Seconds";
            document.getElementById("starttime").style.display += 'none';
            document.getElementById("showtime").style.display += 'none';
            //document.getElementById("showtime").style.display += 'block';
            return false;*/

                        window.location.href = "Loginpage.htm";
                    }
                    else {
                        sec = 60;
                        document.getElementById("showtime").innerHTML = "Your Left Time is :" + min + " Minutes :" + sec + " Seconds";
                        tim = setTimeout("showtime()", 1000);
                    }
                }

            }
        }

Problem 2: But there is problem in count, when i am trying answer 2 questions and leaving next 2 questions without marking or selecting the radio option out 4 total questions then it show wrong total . 问题2：但是在计数方面存在问题，当我尝试回答2个问题，而接下来的2个问题却未标记或选择单选选项时，总共显示了4个问题，那么总数显示是错误的。

**wrong answer :You got 3 of 4 questions correct
correct answer: You got 2 of 4 questions correct**


<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
div#test{ border:#000 1px solid; padding:10px 40px 40px 40px; }
</style>
</head>
<body>
<h2 id="test_status"></h2>
<div id="test"></div>
<script>
var pos = 0, test, test_status, questions, choice, choices, chA, chB, chC, correct = 0;
var questions = [
    [ "What is 10 + 4?", "12", "14", "16", "B" ],
    [ "What is 20 - 9?", "7", "13", "11", "C" ],
    [ "What is 7 x 3?", "21", "24", "25", "A" ],
    [ "What is 8 / 2?", "10", "2", "4", "C" ]
];
function _(x){
    return document.getElementById(x);
}
function renderQuestion(){
    test = _("test");
    if(pos >= questions.length){
        test.innerHTML = "<h2>You got "+correct+" of "+questions.length+" questions correct</h2>";
        _("test_status").innerHTML = "Test Completed";
        pos = 0;
        correct = 0;
        return false;
    }
    _("test_status").innerHTML = "Question "+(pos+1)+" of "+questions.length;
    question = questions[pos][0];
    chA = questions[pos][1];
    chB = questions[pos][2];
    chC = questions[pos][3];
    test.innerHTML = "<h3>"+question+"</h3>";
    test.innerHTML += "<input type='radio' name='choices' value='A'> "+chA+"<br>";
    test.innerHTML += "<input type='radio' name='choices' value='B'> "+chB+"<br>";
    test.innerHTML += "<input type='radio' name='choices' value='C'> "+chC+"<br><br>";
    test.innerHTML += "<button onclick='checkAnswer()'>Submit Answer</button>";
}
function checkAnswer(){
    choices = document.getElementsByName("choices");
    for(var i=0; i<choices.length; i++){
        if(choices[i].checked){
            choice = choices[i].value;
        }
    }
    if(choice == questions[pos][4]){
        correct++;
    }
    pos++;
    renderQuestion();
}
window.addEventListener("load", renderQuestion, false);
</script>

</body>
</html>

can anyone help to fix the problem of timer ? 谁能帮助解决计时器问题？

Answer 1

This answers one of the 2 questions. 这回答了两个问题之一。 I claim the answer choice after question 2 was not reset, so it also got credit for the answer for question 4. This should fix it: 我声称问题2未重设后选择答案，因此它也为问题4的答案赢得赞誉。这应该可以解决：

function checkAnswer(){
    choices = document.getElementsByName("choices");
    choice='Z'; //here is the new code, avoid matches based on earlier
    for(var i=0; i<choices.length; i++){
        if(choices[i].checked){
            choice = choices[i].value;
        }
    }
    if(choice == questions[pos][4]){
        correct++;
    }
    pos++;
    renderQuestion();
}

javascript中的错误总数

问题描述

1 个解决方案

解决方案1
0 2016-08-08 05:09:45

javascript中的错误总数

问题描述

1 个解决方案

解决方案1 0 2016-08-08 05:09:45

解决方案1
0 2016-08-08 05:09:45