对于JavaScript:
var add = function(calculate){
var number1 = document.getElementById('number1').value;
var number2 = document.getElementById('number2').value;
document.getElementById('calculate').innerHTML= parseInt(number1) + parseInt(number2);
};
var subtraction = function(calculate){
var number1 = document.getElementById('number1').value;
var number2 = document.getElementById('number2').value;
document.getElementById('calculate').innerHTML= parseInt(number1) - parseInt(number2);
};
var multiply = function(calculate){
var number1 = document.getElementById('number1').value;
var number2 = document.getElementById('number2').value;
document.getElementById('calculate').innerHTML= parseInt(number1) * parseInt(number2);
};
var divide = function(calculate){
var number1 = document.getElementById('number1').value;
var number2 = document.getElementById('number2').value;
document.getElementById('calculate').innerHTML= parseInt(number1) / parseInt(number2);
};
对于HTML:
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="cool.css"/>
<script src="calculator.js"></script>
<body>
<div id="box" style="width: 800px; height: 400px; border: 2px solid #000;">
<div id="enter1">
<p>Number 1: <input id='number1' value="ENTER 1"type="number"></p>
</div>
<div id="enter2">
<p>Number 2: <input id='number2' type="number" value="ENTER 2"></p>
</div>
<button id="add"onclick='add()' style="font-size: 25px; background-color: #00B85C">ADD</button>
<button id="sub" onclick='subtraction()' style="font-size: 25px; background-color: #FF6600;">SUBTRACT</button>
<button id="multi"onclick='multiply()' style="font-size: 25px; background-color: #2E8AE6">MULTIPLY</buuton>
<button id="div"onclick='divide()' style="font-size: 25px; background-color: #CC6699;">DIVIDE</button>
</div>
<div id="box2" style="width: 800px; heigth: 600px; border 2px solid #000;">
<p id='calculate'>ANSWER HERE</p>
</div>
</body>
</head>
</html>
&#39;数字1&#39;和&#39; number2&#39;是HTML中输入标记的名称。我忘了插入&#39;计算&#39;作为参数;如果您认为没有必要,可以解释一下原因(这有助于我更多地了解代码;)
)
&#39;计算&#39;是我给段落标记的ID,答案将在其中显示。
我想用小数添加(不想写出其余部分)。现在,它只是添加整数。我怎么能做到这一点?
答案 0 :(得分:0)
parseInt
只返回整数值。您需要使用parseFloat
。
此外,使用parseInt
时,最好传递一个基数值(例如parseInt(text, 10);
)。 parseFloat
不需要它。