链表_

链表头文件LinkList.h

#include <iostream>
#include <ctime>

using namespace std;

#define ERROR 0
#define OK 1

typedef int ElemType;
typedef int Status;

typedef struct Node{
	ElemType data;
	struct Node* next;
} Node;
typedef struct Node* LinkList;

void ShowMenu();

void ShowList(LinkList *head);

Status CreateWithHead(LinkList *head,int n);

Status GetMidNode(LinkList L,ElemType *e);

实现文件LinkList.cpp

#include "LinkList.h"

int main(){
	int cmd;
	ElemType e;
	LinkList head;
	ShowMenu();
	cin>>cmd;
	while(cmd){
		switch(cmd){
		case 1:
			CreateWithHead(&head,11);
			break;
		case 2:
			ShowList(&head);
			break;
		case 3:
			GetMidNode(head,&e);
			cout<<"\t\t中间节点为:"<<e<<endl;
			break;
		case 0:exit(0);break;
		default:
			exit(-1);
			break;
		}
		ShowMenu();
		cin>>cmd;
	}
	return 0;
}

void ShowMenu(){
	char *str="\t\t****************************";
	cout<<str<<endl;
	cout<<"\t\t1.头插法"<<endl;
	cout<<"\t\t2.显示列表"<<endl;
	cout<<"\t\t3.获取中点"<<endl;
	cout<<"\t\t0.退出"<<endl;
	cout<<str<<endl;
}

void ShowList(LinkList *head){
	int i=0;
	LinkList p;
	p=*head;
	while(p->next){
		if(i%5==0){
			cout<<endl;
			cout<<"\t\t";
		}
		cout<<p->data<<"  ";
		p=p->next;
		i++;
	}
	cout<<endl;
}

Status CreateWithHead(LinkList *head,int n){
	LinkList p;
	int i;
	srand(time(0));
	*head=(LinkList)malloc(sizeof(Node));
	(*head)->next=NULL;
	
	for(i=0;i<n;i++){
		p=(LinkList)malloc(sizeof(Node));
		p->data=rand()%100+1;
		p->next=*head;
		*head=p;
	}
	return OK;
}

Status GetMidNode(LinkList L,ElemType *e){
	LinkList search,mid;
	search=mid=L;

	while(search->next!=NULL){
		if(search->next->next!=NULL){
			search=search->next->next;
			mid=mid->next;
		}else{
			search=search->next;
		}
	}

	*e=mid->data;
	return OK;
}