c++分别使用枚举器、迭代器实现输出N以内所有的水仙花数

枚举器实现：

import java.util.Enumeration;
import java.util.Vector;

public class NarcissisticNumber {

    public static void main(String[] args) {
        int n = 1000; // 输出N以内的水仙花数
        Vector<Integer> v = new Vector<>();
        for (int i = 100; i <= n; i++) {
            int sum = 0;
            int temp = i;
            while (temp > 0) {
                int digit = temp % 10;
                sum += digit * digit * digit;
                temp /= 10;
            }
            if (sum == i) {
                v.add(i);
            }
        }
        Enumeration<Integer> en = v.elements();
        while (en.hasMoreElements()) {
            System.out.print(en.nextElement() + " ");
        }
    }

}

迭代器实现：

import java.util.ArrayList;
import java.util.Iterator;

public class NarcissisticNumber {

    public static void main(String[] args) {
        int n = 1000; // 输出N以内的水仙花数
        ArrayList<Integer> list = new ArrayList<>();
        for (int i = 100; i <= n; i++) {
            int sum = 0;
            int temp = i;
            while (temp > 0) {
                int digit = temp % 10;
                sum += digit * digit * digit;
                temp /= 10;
            }
            if (sum == i) {
                list.add(i);
            }
        }
        Iterator<Integer> it = list.iterator();
        while (it.hasNext()) {
            System.out.print(it.next() + " ");
        }
    }

}