AngularJS 实现简单购物车

先看看界面：

<!DOCTYPE html>

<html lang="en">
<head>
    <meta charset="UTF-8">

    <title>我的购物车</title>

//这里是自己的angular.js的路径

    <script src="angular.js"></script>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        table {
            border-collapse: collapse;
        }

        td, th {
            padding: 3px;
            height: 50px;
            width: 100px;
            border: 1px solid gainsboro;
            text-align: left;
        }

        .nav {
            width: 800px;
            text-align: right;
        }

        tbody tr td:nth-child(4) {
            width: 200px;
        }

        tbody tr td:nth-child(4) button {
            width: 30px;
            height: 30px;
        }

        tbody tr td:nth-child(4) input {
            width: 30px;
            height: 30px;
            border: 1px solid gainsboro;
            border-radius: 5px;
        }

        .nav button {
            width: 150px;
            height: 40px;
            background: red;
            color: white;
            border: 0;
            border-radius: 5px;
        }

        button {
            width: 50px;
    &n