双向冒泡排序

#include<iostream>
using namespace std;
typedef struct node
{
    int data;
    struct node *prior, *next;
}node, *LinkList;
void Sort(LinkList &L)
{
    int exchange = 1;
    LinkList head = L;
    LinkList tail = NULL;
    while (exchange)
    {
        LinkList p = head->next;
        exchange = 0;
        while (p->next!= tail)
        {
            if (p->data > p->next->data)
            {
                LinkList temp = p->next; exchange = 1;
                p->next = temp->next;
                if (temp->next)temp->next->prior = p;
                temp->next = p; p->prior->next = temp;
                temp->prior = p->prior; p->prior = temp;
            }
            else p = p->next;
        }
        tail = p;
        p = tail->prior;
        while (exchange&&p->prior != head)
        {

            if (p->data < p->prior->data)
            {
                /*LinkList temp = p->prior; exchange = 1;
                p->prior = temp->prior; temp->prior->next = p;
                
                temp->prior = p; p->next->prior = temp;
                
                temp->next = p->next; p->next = temp;*/
                int temp;//直接交换数值
                temp = p->prior->data;
                p->prior->data = p->data;
                p->data = temp;
                exchange = 1;
            }
             p = p->prior;//直接交换数值要往后移动指针
        }
        head = p;
    }
}
void Create(LinkList &L, int n)
{
    LinkList p, rear;
    L = new node;
    L->next = NULL;
    L->prior = NULL;
    rear = L;
    while (n--)
    {
        p = new node;
        cin >> p->data;
        p->next = rear->next;
        rear->next = p;
        p->prior = rear;
        rear = p;
    }
}
void Print(LinkList &L)
{
    LinkList p = L->next;
    while (p->next)
    {
        cout << p->data << " ";
        p = p->next;
    }
    cout << p->data << endl;
}
int main()
{
    int n;
    while (true)
    {
        cin >> n;
        if (!n)break;
        else
        {
            LinkList L;
            Create(L, n);
            Sort(L);
            Print(L);
        }

    }
    return 0;
}

基于双向链表的双向冒泡排序法

 

描述

 

有n个记录存储在带头结点的双向链表中，利用双向冒泡排序法对其按上升序进行排序，请写出这种排序的算法。(注：双向冒泡排序即相邻两趟排序向相反方向冒泡)。

 

输入

多组数据，每组数据两行。第一行为序列的长度n，第二行为序列的n个元素（元素之间用空格分隔，元素都为正整数）。当n等于0时，输入结束。

输出

每组数据输出一行，为从小到大排序后的序列。每两个元素之间用空格隔开。

输入样例 1 

5
4 5 3 2 9
6
1 3 5 7 9 2
0

输出样例 1

2 3 4 5 9
1 2 3 5 7 9