html javascript css写简易计算器

来源：互联网发布：js 两个数组对比去重编辑：程序博客网时间：2024/05/18 11:27

<html>
<head>
<title>计算器</title>
<style>
li{list-style:none;}
body,*{margin:0px;padding:0px;}
#menu{width:300px;height:330px;margin:30px auto;border:1px solid red;border-radius:10px}
#biaoqian{width:100px;height:20px;margin:10px 5px;border:1px solid red;border-radius:10px}
#xianshi{width:265px;height:50px;margin:10px auto;border:1px solid red;border-radius:10px;line-height:40px;text-align:center;font-size:24px;}
#yunsuan{width:265px;height:210px;margin:5px auto;border:1px solid red;border-radius:10px}
li{float:left;width:60px;height:40px;margin:5px 2px;border:1px solid red;border-radius:10px;line-height:40px;text-align:center;font-size:24px;}
</style>
<script>
var sum=0;
function shuzi(n){
var zhi=document.getElementById("xianshi").innerHTML;
document.getElementById("xianshi").innerHTML=zhi+n;
}
var firstnum="";
var ysf="";
function suanfa(m) {a=1;
firstnum=document.getElementById("xianshi").innerHTML;//点击运算符保存第一个数值
//然后在输入第二个值,输入之前先把文本框中第一个值清除
document.getElementById("xianshi").innerHTML="";
//输入第二个值……
ysf=m;
}
function jieguo() {
switch(ysf){
case "+":sum=parseFloat(firstnum)+parseFloat(document.getElementById("xianshi").innerHTML);
break;
case "-":sum=parseFloat(firstnum)-parseFloat(document.getElementById("xianshi").innerHTML);
break;
case "*":sum=parseFloat(firstnum)*parseFloat(document.getElementById("xianshi").innerHTML);
break;
case "/":sum=parseFloat(firstnum)/parseFloat(document.getElementById("xianshi").innerHTML);
break;
case "C": sum=0;
break;
}
document.getElementById("xianshi").innerHTML=sum;
}

</script>

</head>

<body>
<div id="menu">
<div id="biaoqian">斌哥牌计算机</div>
<div id="xianshi"></div>
<div id="yunsuan">
<ul>
<li><a id="d1" name="number" onclick="shuzi(7)">7</a></li>
<li><a id="d1" name="number" onclick="shuzi(8)">8</a></li>
<li><a id="d1" name="number" onclick="shuzi(9)">9</a></li>
<li><a id="d1" name="number" onclick="suanfa('+')">+</a></li><br>
<li><a id="d1" name="number" onclick="shuzi(4)">4</a></li>
<li><a id="d1" name="number" onclick="shuzi(5)">5</a></li>
<li><a id="d1" name="number" onclick="shuzi(6)">6</a></li>
<li><a id="d1" name="number" onclick="suanfa('-')">-</a></li><br>
<li><a id="d1" name="number" onclick="shuzi(1)">1</a></li>
<li><a id="d1" name="number" onclick="shuzi(2)">2</a></li>
<li><a id="d1" name="number" onclick="shuzi(3)">3</a></li>
<li><a id="d1" name="number" onclick="suanfa('*')">×</a></li><br>
<li><a id="d1" name="number" onclick="shuzi(0)">0</a></li>
<li><a id="d1" name="number" onclick="suanfa('C')">C</a></li>
<li><a id="d1" name="number" onclick="suanfa('/')">/</a></li>
<li><a id="d1" name="number" onclick="jieguo()">=</li><br>
</ul>

</div>
</div>
</body>
<script>
/*
var a=document.getElementsByName("number");
for(var i=0;i<a.length;i++){
a[i].onclick=function(){
//alert(this.innerHTML);
document.getElementById("xianshi").innerHTML=this.innerHTML;
}
}
*/
</script>

</html>

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