判断一个三位数是否是水仙花数（如：153 = 1^3 + 5^3 + 3^3，那么153就是水仙花数， 水仙花数只有四个： 153，370，371，407）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
var num = prompt('请输入一个数');
var bai = num / 100;
bai = parseInt(bai)
console.log(bai)
var shi = num / 10 % 10
shi = parseInt(shi)
console.log(shi)
var ge = num % 10;
ge = parseInt(ge)
console.log(ge)
if (num == bai *bai * bai + shi *shi *shi + ge *ge *ge) {
console.log(num + '是水仙花数')
} else {
console.log(num + '不是水仙花数')
}
</script>
</body>
</html>
