java 输入一个数判断是否为水仙花数

import java.util.Scanner;
class Test{
public static void main(String[] args){
Scanner input = new Scanner(System.in);
System.out.print("请输入一个三位数: ");
int num = input.nextInt();
int a = num % 10,
b = num / 10 % 10,
c = num / 100;
if(num == a * a * a + b * b * b + c * c * c){
System.out.println(num + “是水仙花数”);
}else{
System.out.println(num + “不是水仙花数”);
}
}
}