利用javascript编写一个简单的计算器,这是一个很基础的东东,主要是考验初学者的基础
<html>
<head>
<title>计算器</title>
<script type="text/javascript">
function calc()
{
var num1 = parseInt( document.getElementById("num1").value);
var num2 = parseInt( document.getElementById("num2").value);
var op = document.getElementById("op").value;
var result = 0;
switch(op)
{
case"+" :
result = num1 + num2;
break;
case"-" :
result = num1 - num2;
break;
case"*" :
result = num1 * num2;
break;
case"/" :
result = num1 / num2;
break;
}
document.getElementById("resul").innerText = result;
document.getElementById("resul").style.border = "1px,solid,#fff";
}
</script>
<style type="text/css">
body{
background : #aaa ;
div{
width : 600px ;
height : 400px ;
text-align : center ;
background : #ccc ;
}
</style>
</head>
<body>
<div>
<input type="text" id="num1">
<select id="op">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type="text" id="num2">
<button onclick="calc()">结果</button>
<p id="resul"></p>
</div>
</body>
</html>