在前文實作單向連結清單的基本操作下,本文實作
雙向連結清單的基本操作.
雙向連結清單與單連結清單差異,是雙向連結清單結點中有前向指針和後向指針.
是以在插入和删除新結點元素時候不見要考慮後向指針還要考慮
前向指針.
以下是雙向連結清單的C代碼:
#include<stdio.h>
typedef struct node
{
int data;
struct node *next;
struct node *prior
}Node;
//連結清單的初始化
Node* InitList(int number)
{
int i;
Node *pHead=(Node *)malloc(sizeof(Node));
Node *TempHead=pHead;
Node *Head=pHead;
Head->prior=NULL;
int data;
for(i=0;i<number;i++)
{
pHead=(Node *)malloc(sizeof(Node));
printf("Please input the %dst node data:\n",i+1);
scanf("%d",&data);
pHead->data=data;
pHead->next=NULL;
pHead->prior=TempHead;
TempHead->next=pHead;
TempHead=pHead;
}
return Head;
}
//顯示連結清單
void ShowList(Node *Head)
{
Head=Head->next;
while(Head->next!=NULL)
{
printf("%d ",Head->data);
Head=Head->next;
}
printf("%d",Head->data);
printf("\n");
}
//輸對外連結表某個值的位置
int ListLocation(Node *Head,int data,int number)
{
Node *TempNode=Head;
int location=1;
TempNode=TempNode->next;
while(TempNode->next!=NULL)
{
if(TempNode->data==data)
{
return location;
}
location++;
TempNode=TempNode->next;
}
if(location>=number)
printf("Not found!");
}
//輸對外連結表某個位置的值
int ListData(Node *Head,int location,int number)
{
if(location>number)
printf("Not found!");
Node *TempNode=Head;
TempNode=TempNode->next;
int i;
for(i=1;i<=number;i++)
{
if(location==i)
return TempNode->data;
TempNode=TempNode->next;
}
}
//頭入法插入元素
void HeadInsertData(Node *Head,int data)
{
Node *InsertNode=(Node *)malloc(sizeof(Node));
InsertNode->data=data;
InsertNode->next=Head->next;
Head->next->prior=InsertNode;
Head->next=InsertNode;
InsertNode->prior=Head;
}
//尾入插入除元素
void TailInsertData(Node *Head,int data)
{
Node *TempNode=Head;
Node *DeleteNode=(Node *)malloc(sizeof(Node));
DeleteNode->data=data;
while(TempNode->next!=NULL)
TempNode=TempNode->next;
TempNode->next=DeleteNode;
DeleteNode->next=NULL;
DeleteNode->prior=TempNode;
free(DeleteNode);
}
//删除頭結點
void HeadDeleteData(Node *Head)
{
Head->next=Head->next->next;
Head->next->prior=Head;
}
//删除尾結點
void TailDeleteData(Node *Head)
{
Node *TempNode=Head;
while(Head->next->next!=NULL)
Head=Head->next;
Head->next=NULL;
Head->next->prior=NULL;
}
int main()
{
Node *Head;
int number;
printf("Please input the node number:\n");
scanf("%d",&number);
Head=InitList(number);
printf("The initital list is:\n");
ShowList(Head);
int flag;
printf("\n\n");
printf("**********************Your Choice********************\n");
printf("****************1-輸對外連結表某個值的位置***************\n");
printf("****************2-輸對外連結表某個位置的值***************\n");
printf("****************3-頭入法插入元素*********************\n");
printf("****************4-尾入法插入元素*********************\n");
printf("****************5-删除頭結點*************************\n");
printf("****************6-删除尾結點*************************\n");
printf("****************0-退出*******************************\n");
printf("\n\n");
printf("Please input flag:\n");
scanf("%d",&flag);
switch(flag)
{
case 1:
{
int data;
printf("Please input the data you want locate:\n");
scanf("%d",&data);
int location;
location=ListLocation(Head,data,number);
printf("The data's location is: %d",location);
break;
}
case 2:
{
int location;
printf("Please input the location you want data:\n");
scanf("%d",&location);
int data;
data=ListData(Head,location,number);
printf("The location's data is: %d\n",data);
break;
}
case 3:
{
int data;
printf("Please input the data you want insert in head:\n");
scanf("%d",&data);
HeadInsertData(Head,data);
ShowList(Head);
break;
}
case 4:
{
int data;
printf("Please input the data you want insert in tail:\n");
scanf("%d",&data);
TailInsertData(Head,data);
ShowList(Head);
break;
}
case 5:
{
HeadDeleteData(Head);
ShowList(Head);
break;
}
case 6:
{
TailDeleteData(Head);
ShowList(Head);
break;
}
case 7:
{
printf("You choose to exit.\n");
break;
}
}
return 0;
}
結果圖:
轉載請注明作者:小劉