水仙花数(无聊ing)

昨晚和朋友说起,刚开始学编程的时候遇到的一些感觉比较纠结的事情,想到了水仙花数 

顺手一些

 

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;

namespace Test
{
    class Program
    {
        
        static void Main(string[] args)
        {
            ShuiXian();
            Console.WriteLine("-----------------------------------------------");
            ArrayList arr = new ArrayList();
            ShuiXian(arr);
            Console.WriteLine("悲催的自己写的 差远了 哭");
            foreach (string s in arr)
            {
                Console.WriteLine("水仙花数:" + s);
            }
        } 
        
        //百度百科的答案
        public static void ShuiXian()
        {    Console.WriteLine("百度百科的答案" );
            for (int i = 100; i < 1000; i++)
            {
                int bai = 0;
                int shi = 0;
                int ge = 0;
                int baiyushu = 0;
                bai = i / 100;
                baiyushu = i % 100;
                shi = baiyushu / 10;
                ge = baiyushu % 10;
                if (i == bai * bai * bai + shi * shi * shi + ge * ge * ge)
                {
                    Console.WriteLine("水仙花数：" + i);
                }
            }
        }
        //153，370，371，407  //悲催的自己写的 差远了 哭
        public static void ShuiXian(ArrayList arr)
        {
            string str = "";

            for (int i = 1; i < 10; i++)
            {
                for (int j = 0; j < 10; j++)
                {
                    for (int k = 0; k < 10; k++)
                    {
                        if ((i != j) && (i != k))
                        {
                            if (((i * i * i) + (j * j * j) + (k * k * k)) == Convert.ToInt32((i.ToString() + j.ToString() + k.ToString())))
                            {
                                str = (i.ToString() + j.ToString() + k.ToString()).ToString();
                                arr.Add(str);
                            }
                        }
                    }
                }
            }
        }
    }
}