这是我正在构建的一个数学练习游戏，它使用随机函数来更改数学问题的数字。用户将答案输入文本框，然后通过单击“检查”按钮检查答案。 fillElements() 函数正在工作，但是当我单击“检查”时，我无法从程序中获得响应。到目前为止，我已经解决了很多错误，但这个问题我看不到或理解。
<body onload="fillElements()">
<form action="math.html">
<ul>
<li id="num"> </li>
<li> +</li>
<li id="num2"> </li>
<li> =</li>
<li><input type="text" name="answer" id="answer" /></li>
</ul>
<button type="button" onclick="validate()">Check</button>
</form>
<script src="javaScript/math.JS"></script>
</body>
//JavaScript
var totalCorrect= 0;
var totalIncorrect= 0;
var score = math.round(totalCorrect/totalIncorrect);
var message= 'Congrats!, you scored:' + score + 'percent';
function fillElements() {
firstNum = ['0','1','2','3','4','5','6','7','8','9'];
secondNum = ['0','1','2','3','4','5','6','7','8','9'];
var rand= Math.floor((Math.random()*9)+1);
var rand2= Math.floor((Math.random()*9)+1);
var el= document.getElementById('num');
el.textContent = firstNum[rand];
var el2= document.getElementById('num2');
el2.textContent = secondNum[rand2];
}
function validate() {
var userAnswer= number(document.getElementById('answer'));
if (num + num2 === userAnswer) {
totalCorrect++;
alert(message);
fillElements();
}
else {
totalIncorrect++;
alert(message);
}
}
最佳答案
这不是number()，而是Number()
工作代码...
HTML
<form action="math.html">
<ul>
<li id="num"></li>
<li> +</li>
<li id="num2"></li>
<li> =</li>
<li><input type="text" name="answer" id="answer" /></li>
</ul>
<button type="button" onclick="validate();">Check</button>
</form>
Javascript
window.onload = function(){
fillElements();
}
function fillElements() {
firstNum = ['0','1','2','3','4','5','6','7','8','9'];
secondNum = ['0','1','2','3','4','5','6','7','8','9'];
var rand= Math.floor((Math.random()*9)+1);
var rand2= Math.floor((Math.random()*9)+1);
var el= document.getElementById('num');
el.textContent = firstNum[rand];
var el2= document.getElementById('num2');
el2.textContent = secondNum[rand2];
}
var totalCorrect= 1;
var totalIncorrect= 1;
function validate() {
var userAnswer= Number(document.getElementById('answer').value);
var num = document.getElementById('num').textContent;
var num2 = document.getElementById('num2').textContent;
var valid = Number(num) + Number(num2);
if (valid === userAnswer) {
totalCorrect++;
var score = Math.round(totalCorrect/totalIncorrect);
var message= 'Congrats!, you scored:' + score + 'percent';
alert(message);
fillElements();
}else {
totalIncorrect++;
var score = Math.round(totalCorrect/totalIncorrect);
var message= 'Congrats!, you scored:' + score + 'percent';
alert(message);
}
}
编辑:不要使用
var totalCorrect= 0;
var totalIncorrect= 0;
因为如果你得分，那么它会打印 infinity => Math.round(1/0); try
var totalCorrect= 1;
var totalIncorrect= 1;
关于javascript - 在数学游戏中检查答案不会执行，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31363485/