判断水仙花数

public class E201_03_02判断水仙花数 { public static void main(String[] args) { System.out.println("请输入一个三位数："); Scanner scan = new Scanner(System.in); int num = scan.nextInt(); int b100 = num/100; int b10 = num%100/10; int b1 = num%10; int num1 = b100*b100*b100+b10*b10*b10+b1*b1*b1; if(num<100 || num>999){ System.out.println(num+"不是一个三位数"); return; } boolean result = b100*b100*b100+b10*b10*b10+b1*b1*b1 == num; if(result == true){ System.out.println(num+"是水仙花数"); }else{ System.out.println(num+"不是水仙花数"); } } }