<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>計算器</title>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<input type="text" v-model="n1">
<select v-model="opt">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type="text" v-model="n2">
<input type="button" value="=" @click="calc">
<input type="text" v-model="result">
</div>
<script>
new Vue({
el: '#app',
data: {
n1: 0,
n2: 0,
result: 0,
opt: '+'
},
methods: {
calc() {
switch (this.opt) {
case "+":
this.result = parseInt(this.n1) + parseInt(this.n2);
break;
case "-":
this.result = parseInt(this.n1) - parseInt(this.n2);
break;
case "*":
this.result = parseInt(this.n1) * parseInt(this.n2);
break;
case "/":
this.result = parseInt(this.n1) / parseInt(this.n2);
break;
}
}
}
})
</script>
</body>
</html>
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