日记式之Html5之计算器(2018.12.5)

![在这里插入图片描述](https://img-blog.csdnimg.cn/20181206143034504.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzM1Mjk1,size_16,color_FFFFFF,t_70)
<html>
<head>
	<title>每日一练之计算器</title>
	<meta charset="utf-8"/>
</head>
<style type="text/css">
	#showdiv{
		margin:auto;
		margin-top: 100px;
		border:1px solid;
		width:300px;
		border-radius: 10px;
		background-color: whitesmoke;
	}
	input[type=text]{
		width:280px;
		height:40px;
		margin-left: 10px;
		margin-top: 10px;
	}
	input[type=button]{
		width:60px;
		height:60px;
		margin-top: 10px;
		margin-left:10px;
		margin-bottom: 10px;
		font-size:30px;
	}
</style>
<script type="text/javascript">
	function Counting(obj){
		var text = document.getElementById("tet");
		switch(obj.value){
			case "C":
			text.value="";
			break;
			case "=":
			text.value=eval(text.value);
			break;
			default:
			text.value=text.value+obj.value;
			break;
		}
	}
</script>
<body>
	<div id="showdiv">
		<input type="text" name="" id="tet" value="" /><br/>
		<input type="button" name="" id="" value="0" onclick="Counting(this)"/>
		<input type="button" name="" id="" value="1" onclick="Counting(this)"/>
		<input type ="button" name="" id="" value="2" onclick="Counting(this)"/>
		<input type="button" name="" id="" value="3" onclick="Counting(this)"/><br/>
		<input type="button" name="" id="" value="4" onclick="Counting(this)"/>
		<input type="button" name="" id="" value="5" onclick="Counting(this)"/>
		<input type="button" name="" id="" value="6" onclick="Counting(this)"/>
		<input type="button" name="" id="" value="7" onclick="Counting(this)"/><br/>
		<input type="button" name="" id="" value="8" onclick="Counting(this)"/>
		<input type="button" name="" id="" value="9"  onclick="Counting(this)">
		<input type="button" name="" id="" value="+" onclick="Counting(this)"/>
		<input type="button" name="" id="" value="-" onclick="Counting(this)"/><br/>
		<input type="button" name="" id="" value="*" onclick="Counting(this)"/ >
		<input type="button" name="" id="" value="/" onclick="Counting(this)"/>
		<input type="button" name="" id="" value="C" onclick="Counting(this)"/>
		<input type="button" name="" id="" value="=" onclick="Counting(this)"/>
	</div> 
</body>

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转载自blog.csdn.net/qq_38335295/article/details/84853170