算法之水仙花数（Java语言）

             1
            /**
             2
             * A Narcissistic number is a number that is the sum of its own digits each

             3
             * raised to the power of the number of digits. E.g., 0, 1, 2, 3, 4, 5, 6, 7, 8,

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             * 9, 153, 370, 371, 407, 1634, 8208, 9474.

             5
            */
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            public
            class
             NarcissisticNumberExample {

             7
            //
            判断value是否为水仙花数
             8
            public
            static
            boolean isNarcissisticNumber(int value) {
 9int temp = value;
10int digits = 0;
11//判断value有几位数，保存在digits12while (temp > 0) {
13             digits++;
14             temp /= 10;
15        }
16         temp = value;
17int sum = 0;
18while (temp > 0) {
19             sum += Math.pow(temp % 10, digits);
20             temp /= 10;
21        }
22return sum == value;
23    }
2425//开始数和结束数26publicstaticvoid printNarcissistics(int from, int to) {
27int which=0;
28for (int i = from; i <= to; i++)
29if (isNarcissisticNumber(i)){
30                 which++;
31                 System.out.println("第"+which+"个水仙数是："+i);
32            }
333435    }
3637//1000里有几个水仙数38publicstaticvoid main(String[] args) {
39         printNarcissistics(0,1000);
40    }
4142 }