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来源：2-11 自由编程

weixin_慕莱坞5067944

2023-01-13 07:36:00

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../lib/vue.js"></script>
</head>
<body>
    <div id="app">
        <input type="text" v-model="num1">
        <select v-model="opt">
            <option value="+">+</option>
            <option value="-">-</option>
            <option value="*">*</option>
            <option value="/">/</option>
        </select>
        <input type="text" v-model="num2">
        <button @click = "cal">=</button>
        <span>{{result}}</span>
    </div>
    <script>
        const app = {
            data(){
                return{
                    result:''
                }
            },
            methods:{
                cal(){
                    switch(this.opt){
                        case '+':
                            this.result = parseFloat(this.num1) + parseFloat(this.num2);
                            break;
                        case '-':
                            this.result = parseFloat(this.num1) - parseFloat(this.num2);
                            break;
                        case '*':
                            this.result = parseFloat(this.num1) * parseFloat(this.num2);
                            break;
                        case '/':
                            this.result = parseFloat(this.num1) / parseFloat(this.num2);
                            break;
                    }
                }
            }
        }
        Vue.createApp(app).mount('#app');
    </script>
</body>
</html>

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