老师！请检查作业哈

来源：2-11 自由编程

和你一起终身学习

2023-01-04 23:08:00

<!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>简易计算器</title>
    <script src="../lib/vue.js"></script>
</head>
<body>
    <div id="app">
        <!-- 能够完成加减乘除运算的简易计算器 -->
        <input type="text" v-model="num1">
        <select v-model="opt">
            <option value="+">+</option>
            <option value="-">-</option>
            <option value="*">x</option>
            <option value="/">/</option>
        </select>
        <input type="text" v-model="num2">
        <button @click="cal">=</button>
        <span>{{result}}</span>
    </div>
    
    <script>
        const app = {
            data() {
                return {
                    num1:"",
                    num2:"",
                    opt:"+",
                    result:"结果"
                }
            },

            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;     
                    }
                    console.log(this.result);
                }
            },
        }


        Vue.createApp(app).mount('#app');
    </script>
</body>
</html>

写回答

1回答