Java实现约瑟夫环

什么是约瑟夫环呢?
　　约瑟夫环是一个数学的应用问题：已知n个人(以编号1，2，3...n分别表示)围坐在一张圆桌周围。从编号为k的人开始报数，数到m的那个人出列;他的下一个人又从1开始报数，数到m的那个人又出列;依此规律重复下去，直到圆桌周围的人全部出列。
　　我们用程序说话，实现约瑟夫环：eclipse jdk1.6

package code;

import java.awt.PointerInfo;
import java.util.Random;
import java.util.Scanner;

public class Josephus {
    private static class Node{
        public int no;
        public Node next;
        
        public Node(int no){
            this.no = no;
            this.next =null;
        }
    }
    public static void main(String[] args){
        /*
        Scanner input = new Scanner(System.in);
        System.out.println("taotal nums");
        int totalNum = input.nextInt();
        System.out.println("size");
        int cycleNum = input.nextInt();*/
        
        
        Random rand = new Random();
        int totalNum = rand.nextInt(30);
        int cycleNum =rand.nextInt(5);
        if(cycleNum <=1 || cycleNum >= totalNum){
            System.out.println("error");
            return ;
        }
        Node header = new Node(1);
        Node pointer = header;
        for(int i = 2 ;i<= totalNum ;i++){
            pointer.next = new Node(i);
            pointer = pointer.next;
        }
        pointer.next = header ;
        
        System.out.println(totalNum +" " + cycleNum); 
        System.out.println("order output");
        while(pointer != pointer.next){
            for ( int i =1 ;i <cycleNum ;i++){
                pointer =pointer.next;
            }
            System.out.println(pointer.next.no);
            pointer.next = pointer.next.next;
        }
        System.out.println(pointer.next.no);
    }
}

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