如何使用Javascript计算正确答案的数量? [英] How to count the number of correct answers using Javascript?
问题描述
我正在尝试创建一个简单的网站，以计算我举起的手指的数量(随机数).但是，我想在网站上添加一些其他内容.我正在尝试在容器的侧面创建一个计数器，用于计算正确答案的数量，并且每当用户错误地收到问题时，该计数器就会降为零.这是我的网站代码...
I'm trying to create a simple website about counting the number of fingers I'm putting up (random number). However, I want to add something extra to the website. I'm trying to create a counter on the side of the container that counts the number of correct answers, and drops down to zero whenever the user get a question incorrectly. Here is my code for the site...
<!doctype html>
<html>
<head>
<title>Changing Website Content</title>
<link href='http://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>
<style type="text/css">
body {
background-image: url(nyc.jpg);
width:100%;
font-family: 'Open Sans', sans-serif;
}
#main {
margin: 100px;
background-color: #ede1e1;
padding: 50px;
position: relative;
top: 50px;
}
</style>
</head>
<body>
<div id="main">
<p>How many fingers am I holding up? Pick a number 1 - 5.</p>
<input id="fingers" type="text">
<button type="submit" id="fingerChecker">Guess?</button>
</div>
<script type="text/javascript">
document.getElementById("fingerChecker").onclick = function() {
var fingers = document.getElementById("fingers").value;
var random1 = (Math.floor((Math.random() * 5) + 1))
if (fingers == (random1)) {
alert("Yes, you are correct!")
} else {
alert("Nope! I had " + random1);
}
}
</script>
</body>
</html>
欢迎任何帮助.(这是我的第一篇文章，所以请原谅我可能犯的任何错误！)
Any help is welcomed. (This is my fist post so excuse any mistakes I may have made!)
推荐答案
您应该创建一个得分变量，如果答案正确，则增加得分并将其设置为得分元素的 innerHTML .如果用户输入的答案有误，请将分数重置为0.
You should create a score variable and if the answer is correct increase the score and set it to the innerHTML of a score element. If the user gets an incorrect answer reset the score to 0.
var score = 0;
document.getElementById("fingerChecker").onclick = function() {
var fingers = document.getElementById("fingers").value;
var random1 = (Math.floor((Math.random() * 2) + 1))
if (fingers == (random1)) {
alert("Yes, you are correct!");
score++;
} else {
alert("Nope! I had " + random1);
score = 0;
}
document.getElementById("score").innerHTML = score;
}<div id="main">
<p>How many fingers am I holding up? Pick a number 1 - 5.</p>
<input id="fingers" type="text">
<button type="submit" id="fingerChecker">Guess?</button>
</div>
<div id="score">0</div>这篇关于如何使用Javascript计算正确答案的数量?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
