首页c++迭代器输出水仙花数

c++迭代器输出水仙花数

时间: 2023-11-20 17:30:50 浏览: 79

#include <iostream> #include <cmath> using namespace std; int main() { int start, end; cout << "请输入起始数："; cin >> start; cout << "请输入结束数："; cin >> end; for(int i = start; i <= end; i++) { int num = i; int sum = 0; int count = 0; while(num > 0) { count++; num /= 10; } num = i; while(num > 0) { sum += pow(num % 10, count); num /= 10; } if(sum == i) cout << i << "是水仙花数" << endl; } return 0; }

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： ```java 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： ```java 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() + " "); } } } ```

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