Random Cube Algorithm

本来我就是魔方爱好者，所有是魔友当然少不了pc端的计时器，以下是魔方打乱公式算法代码，语言：c#；

public static string rndCube( int max )； 是获取随机打算字符串的入口函数；

max就是打乱长度了。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
////
////code by:chouhom
////
namespace ConsoleApplication1
{
    class Program
    {
        static string[] rndMove = new string[] { "R", "L", "F", "B", "U", "D" };
        static List<string> arr = new List<string>();
        static string[] Arr;
        static Random r = new Random();
        /// <summary>
        /// slice
        /// </summary>
        /// <param name="move1"></param>
        /// <param name="move2"></param>
        /// <returns></returns>
        public static bool slice(string move1, string move2)
        {
            int i = Convert.ToInt32(move1);
            int k = Convert.ToInt32(move2);
            if (i / 2 == k / 2)
                return true;
            else return false;
        }
        /// <summary>
        /// random filter
        /// </summary>
        /// <param name="tmpRnd">int.tostring</param>
        /// <returns>false is yes</returns>
        public static bool checkmove(string tmpRnd)
        {
            Arr = arr.ToArray();
            if (Arr.Length > 0 && tmpRnd == Arr[Arr.Length - 1])
                return true;
            else
            {
                if (Arr.Length > 1 && tmpRnd == Arr[Arr.Length - 2] && slice(tmpRnd, Arr[Arr.Length - 1]))
                    return true;
                else return false;
            }
        }
        /// <summary>
        /// create random cube string
        /// </summary>
        /// <param name="max">length</param>
        /// <returns>randomCube string</returns>
        public static string rndCube(int max)
        {
            string move = "";
            string tmpRnd;
            max++;
            for (int i = 0; i < max; i++)
            {
                do { 
                    tmpRnd = r.Next(6).ToString(); 
                }
                while (checkmove(tmpRnd));
                arr.Add(tmpRnd);
            }
            for (int i = 0; i < Arr.Length; i++)
            {
                int tmp = r.Next(5);
                if (tmp == 4) { move += rndMove[Convert.ToInt32(Arr[i])] + "2 "; }
                else if (tmp == 2 || tmp == 3)
                { move += rndMove[Convert.ToInt32(Arr[i])] + "' "; }
                else
                { move += rndMove[Convert.ToInt32(Arr[i])] + " "; }
            }
            return move;
        }
        static void Main(string[] args)
        {
            Console.Write(rndCube(15));
            Console.ReadKey();
        }
    }
}