C# 小程序之新手练习（三）数组模拟约瑟夫环

//用数组模拟约瑟夫环
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication3
{
    class Program
    {
        /// <summary>
        /// 返回约瑟夫环出列顺序的数组
        /// </summary>
        /// <param name="total">初始全部人数</param>
        /// <param name="begin">开始编号</param>
        /// <param name="dequeue">每多少个出列一个</param>
        /// <returns></returns>
        static int[] Josephus(int total, int begin, int dequeue)
        {
            int count =0,j;//count要输出的数组的下标
            int[] iCounts = new int[total];//结果数组
            int[] preCounts = new int[total];//初始数组
            for (int i = 0; i < total; i++)//预处理初始数组
            {
                preCounts[i] = i;
            }
            for (int i = total-1; i >= 2;i-- )
            {
                begin = (begin + dequeue - 1) % i;//每次应该出列的编号
                if (begin == 0)
                {
                    begin = i;
                }
                iCounts[count] = preCounts[begin];//将要出列的编号存入结果数组
                count++;
                for (j = begin+1; j <= i; j++)
                {
                    preCounts[j - 1] = preCounts[j];//一个人出列后，它后面往前移
                }
            }
            iCounts[count] = preCounts[1];//最后一个出列的
            return iCounts;//返回结果数组
        }
        /// <summary>
        /// 主函数
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)
        {

            int[] JosArray = Josephus(8,5,2);//共有8个人，从第5个开始，数到2的那个人出列
            for (int i = 0; i < JosArray.Length - 1; i++)
            {
                Console.Write(JosArray[i] + " ");//输出出列顺序
            }
            Console.ReadLine();
        }
    }
}