目录

一、主程序（test.c）

二、自定义头文件（DList.h）

三、函数程序（DList.c）

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一、主程序（test.c）

#define _CRT_SECURE_NO_WARNINGS 1
#include "DList.h"int main()
{//创建哨兵位及初始化ListNode* dlist = ListCreate();// 双向链表尾插ListPushBack(dlist, 1);ListPushBack(dlist, 2);ListPushBack(dlist, 3);ListPushBack(dlist, 4);ListPushBack(dlist, 5);ListPushBack(dlist, 6);//打印ListPrint(dlist);//尾删ListPopBack(dlist);ListPrint(dlist);ListPopBack(dlist);ListPrint(dlist);ListPopBack(dlist);ListPrint(dlist);//头插ListPushFront(dlist, 1);ListPrint(dlist);ListPushFront(dlist, 2);ListPrint(dlist);ListPushFront(dlist, 3);ListPrint(dlist);ListPushFront(dlist, 4);ListPrint(dlist);ListPushFront(dlist, 5);ListPrint(dlist);ListPushFront(dlist, 6);ListPrint(dlist);//头删ListPopFront(dlist);ListPopFront(dlist);ListPopFront(dlist);ListPrint(dlist);//查找ListNode* pos = ListFind(dlist, 1);//在pos前面插入xListInsert(pos, 2);ListPrint(dlist);//查找pos = ListFind(dlist, 2);// 双向链表删除pos位置的节点ListErase(pos);ListPrint(dlist);return 0;
}

二、自定义头文件（DList.h）

#pragma once
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>// 带头+双向+循环链表增删查改实现
typedef int LTDataType;
typedef struct ListNode
{LTDataType _data;struct ListNode* _next;struct ListNode* _prev;
}ListNode;// 创建返回链表的头结点.
ListNode* ListCreate();
// 双向链表销毁
void ListDestory(ListNode* pHead);
// 双向链表打印
void ListPrint(ListNode* pHead);
// 双向链表尾插
void ListPushBack(ListNode* pHead, LTDataType x);
// 双向链表尾删
void ListPopBack(ListNode* pHead);
// 双向链表头插
void ListPushFront(ListNode* pHead, LTDataType x);
// 双向链表头删
void ListPopFront(ListNode* pHead);
// 双向链表查找
ListNode* ListFind(ListNode* pHead, LTDataType x);
// 双向链表在pos的前面进行插入
void ListInsert(ListNode* pos, LTDataType x);
// 双向链表删除pos位置的节点
void ListErase(ListNode* pos);

三、函数程序（DList.c）

#define _CRT_SECURE_NO_WARNINGS 1#include "DList.h"//创建新节点及申请空间
ListNode* Buynode(LTDataType x)
{ListNode* node = (ListNode*)malloc(sizeof(ListNode));if (node == NULL){perror("node:");}else{node->_data = x;node->_next = NULL;node->_prev = NULL;}return node;
}//创建哨兵位及初始化
ListNode* ListCreate()
{ListNode* newnode = Buynode(0);newnode->_next = newnode;newnode->_prev = newnode;return newnode;
}// 双向链表尾插
void ListPushBack(ListNode* pHead, LTDataType x)
{assert(pHead);ListNode* newnode = Buynode(x);ListNode* tail = pHead->_prev;tail->_next = newnode;newnode->_prev = tail;newnode->_next = pHead;pHead->_prev = newnode;
}// 双向链表打印
void ListPrint(ListNode* pHead)
{assert(pHead);ListNode* tail = pHead->_next;printf("<= phead ");while (tail != pHead){printf("<=> %d ", tail->_data);tail = tail->_next;}printf("=>\n");
}// 双向链表尾删
void ListPopBack(ListNode* pHead)
{assert(pHead);if (pHead->_next == pHead){printf("链表为空，无法删除!!!\n");return;}ListNode* tail = pHead->_prev;ListNode* prevnode = tail->_prev;prevnode->_next = pHead;pHead->_prev = prevnode;free(tail);tail = NULL;
}// 双向链表头插
void ListPushFront(ListNode* pHead, LTDataType x)
{assert(pHead);ListNode* first = pHead->_next;ListNode* newnode = Buynode(x);newnode->_next = first;first->_prev = newnode;newnode->_prev = pHead;pHead->_next = newnode;
}// 双向链表头删
void ListPopFront(ListNode* pHead)
{assert(pHead);if (pHead->_next == pHead){printf("链表为空，无法删除!!!\n");return;}ListNode* first = pHead->_next;pHead->_next = first->_next;first->_next->_prev = pHead;free(first);first = NULL;}// 双向链表查找
ListNode* ListFind(ListNode* pHead, LTDataType x)
{assert(pHead);ListNode* scr = pHead->_next;while (scr != pHead){if (scr->_data == x){return scr;}scr = scr->_next;}return NULL;
}// 双向链表在pos的前面进行插入
void ListInsert(ListNode* pos, LTDataType x)
{assert(pos);ListNode* prev = pos->_prev;ListNode* newnode = Buynode(x);newnode->_next = pos;pos->_prev = newnode;prev->_next = newnode;newnode->_prev = prev;
}// 双向链表删除pos位置的节点
void ListErase(ListNode* pos)
{assert(pos);ListNode* prev = pos->_prev;ListNode* next = pos->_next;prev->_next = next;next->_prev = prev;free(pos);pos = NULL;
}