因为算账不好就自己写了一个 哈哈~
**```
HTML代码部分:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>计算器</title>
<link rel="stylesheet" type="text/css" href="css/index.css">
</head>
<body>
<div class="cal-box">
<div class="num-board" id="numBoard">0</div>
<table>
<tr>
7 8 9 + 4 5 6 - 1 2 3 x c 0 / =