C语言之复杂链表的复制方法(图示详解)

typedef int DataType;  //数据域的类型

//复杂链表的数据结构

typedef struct ComplexNode

{

DataType _data ;      // 数据

struct ComplexNode * _next;   // 指向下个节点的指针

struct ComplexNode * _random;  // 指向随机节点（可以是链表中的任意节点 or 空）

}ComplexNode;

#ifndef __COMPLEX__NODE__H__
#define __COMPLEX__NODE__H__
 
//包含头文件
#include <stdio.h>
#include<stdlib.h>
#include <assert.h>
 
 
typedef int DataType;  //数据域的类型
 
//复杂链表的数据结构
typedef struct ComplexNode
{
DataType _data ;        // 数据
struct ComplexNode * _next;    // 指向下个节点的指针
struct ComplexNode * _random;  // 指向随机节点（可以是链表中的任意节点 or 空）
}ComplexNode;
 
//创建一个复杂链表的结点
ComplexNode * BuyComplexNode(DataType x);
 
//打印复杂的单链表
void Display(const ComplexNode * cplist);
 
//复杂链表的复制
ComplexNode * CopyComplexNode(ComplexNode * cplist);
 
#endif//__COMPLEX__NODE__H__

#include "complexnode.h"

 

//创建一个复杂链表的结点

ComplexNode * BuyComplexNode(DataType x)

{

ComplexNode *cnode = (ComplexNode *)malloc(sizeof(ComplexNode));

if(cnode == NULL)//创建失败

{

perror("BuyComplexNode()::malloc");

return NULL;

}

//创建成功

cnode->_data = x;

cnode->_next = NULL;

cnode->_random = NULL;

return cnode;

}

 

//打印复杂的单链表

void Display(const ComplexNode * cplist)

{

ComplexNode *pnode = cplist;

while (pnode)

{

printf("%d::%d -->",pnode->_data,pnode->_random->_data);

pnode = pnode->_next;

}

printf("over\n");

 

}

 

//复杂链表的复制

ComplexNode * CopyComplexNode(ComplexNode * cplist)

{

 

ComplexNode * pold = NULL;

ComplexNode * pnew = NULL;

ComplexNode * newlist = NULL;//指向新的复杂链表的头结点的指针

pold = cplist;

//创建一条新的复杂链表

while(pold != NULL)

{

ComplexNode * new_node = BuyComplexNode(pold->_data);

if(newlist == NULL)//当新的复杂链表中没有结点时

{

newlist = new_node;

}

else//当新的复杂链表有结点时

{

ComplexNode * node = newlist;

while(node->_next != NULL)//找到最后一个结点

{

node = node->_next;

}

node->_next = new_node;//插入新的结点

}

pold = pold->_next;

 

}//创建新的复杂链表结束

 

//合并两条复杂链表

pold = cplist;

pnew = newlist;

while (pold)

{

ComplexNode * curold = NULL;

ComplexNode * curnew = NULL;

curold = pold->_next;

curnew = pnew->_next;

if(pold->_next == NULL)

{

pold->_next = pnew;

pold = curold;

pnew = curnew;

break;

}

pold->_next = pnew;

pnew->_next = curold;

pold = curold;

pnew = curnew;

}//合并两条复杂链表结束

 

//让新创建的那条复杂链表上的所有结点的random指针指向相应的结点

pold = cplist;

pnew = newlist;

while (pnew)

{

pnew->_random = pold->_random->_next;

pold = pnew->_next;

if(pold == NULL)//这是pnew的_next指针已经指向空

{

break;

}

pnew = pold->_next;

}//结束

 

//分离合并后的复杂链表

pold = cplist;

pnew = newlist;

while (pold)

{

ComplexNode * curold = NULL;

ComplexNode * curnew = NULL;

if(pnew->_next == NULL)//已经分离完成

{

pold->_next = NULL;

pnew->_next = NULL;

break;

 

}

curold = pold->_next->_next;

curnew = pnew->_next->_next;

 

pold->_next = curold;

pnew->_next = curnew;

pold = curold;

pnew = curnew;

}//分离合并的复杂链表结束

 

return newlist;

}

#include "complexnode.h"

//

//复杂链表的复制。?个链表的每个节点，有?个指向next指针指向下?个节

//点，还有?个random指针指向这个链表中的?个随机节点或者NULL，现在要

//求实现复制这个链表，返回复制后的新链表。

//ps: 复杂链表的结构

 

 

 

void test()

{

ComplexNode * cplist;

ComplexNode * copylist;

ComplexNode * node1;

ComplexNode * node2;

ComplexNode * node3;

ComplexNode * node4;

cplist = BuyComplexNode(1);

node1 = BuyComplexNode(2);

node2 = BuyComplexNode(3);

node3 = BuyComplexNode(4);

node4 = BuyComplexNode(5);

cplist->_next = node1;

node1->_next = node2;

node2->_next = node3;

node3->_next = node4;

cplist->_random = node3;

node1->_random = node4;

node2->_random = cplist;

node3->_random = node1;

node4->_random = node2;

Display(cplist);

copylist = CopyComplexNode(cplist);

Display(copylist);

 

}

int main()

{

test();

return 0;

}