一个异质链表的实现 请大家帮我看一下

[lzokwlz]

# include <iostream>
#include<string>

using namespace std;

//类和继承类

class people //基类
{
private:
int number,age;
string name;
public:
int getnum(){return number;}
people(int num, string s,int i):number(num),name(s),age(i){}
virtual void addnode()
{int num,i;
string s;
cout<<"please input the number of the person：\n";
cin>>num;
cout<<"please input the name of the person：\n";
cin>>s;
cout<<"please input the age of the person：\n";
cin>>i;
}
virtual void print()
{

cout << "\nnumber:" <<number
<< "\nName:" << name
<< "\nage:"<< age ;

}

};


class doctor: public people //docter中增加部门
{int d;
public:
doctor(int num,string s,int i, string d):people(num,s,i),department(d){}

void addnode()
{
people::addnode();
cout<<"please input the department of the doctor：\n";
cin>>d;
}

void print()
{
people::print();
cout<<"\ndepartment: "<<department<<endl;
}



private:
string department;
};



class student: public people //student中增加分数
{int sc;
public:
student(int num,string s,int i,int sc):people(num,s,i),scores(sc){}
void addnode()
{
people::addnode();
cout<<"please input the scores of the student：\n";
cin>>sc;
scores=sc;
}
void print()
{
people::print();
cout<<"\nscores: "<<scores<<endl;
}
private:
int scores;
};


class worker: public people //worker中增加工资
{int sa;
public:
worker(int num,string s, int i,int sa):people(num,s,i){}
void addnode()
{
people::addnode();
cout<<"please input the salary of the worker：\n";
cin>>sa;
salary=sa;
}
void print()
{
people::print();
cout<<"\nsalary: "<<salary<<endl;
}
private:
int salary;
};


class List
{
public:
List(people* q):po(q),pnext(0){}
people* po; //指向对象
List* pnext; //指向结点
};



class Listoperate
{
private:
List * pfirst; //链首结点指针
public:
Listoperate():pfirst(0){}
//void Creat(people*); //建立初始节点
void Delete(int); //删除结点
void Insert(people*); //插入结点
void Find(int); //寻找结点
void Pri(); //输出链表
};

void Listoperate::Creat(people* pn) //建立初始节点
{

List* n= new List(pn);

if (!pfirst) pfirst = n;

else

{

n->pnext = pfirst;

pfirst = n;

}
}



void Listoperate::Insert(people* pn) //插入结点

{ //int x,z,k;
char m;
string y,i;
doctor* q;
student* p;
worker* w;


cout<<"\n\n1.doctor 2.worker 3.student "<<endl;
cout<<"\n\nplease input the kind of the people that you want to insert:"<<endl;
cin>>m;
if(m=='1')
{
pn=p;
pn->addnode();
}

else
if(m=='2')
{
pn=w;
pn->addnode();
}
else
{
pn=q;
pn->addnode();
}


doctor doc();
worker wor();
student stu();
//Listop.Insert((people*)&doc);
//Listop.Insert((people*)&wor);
//Listop.Insert((people*)&stu);

List* n= new List(pn);

if (!pfirst) pfirst = n;

else

{

n->pnext = pfirst;

pfirst = n;

}
}



void Listoperate::Delete(int nu) //删除结点t
{
List* p=pfirst;
if(pfirst->po->getnum()==nu)
{
pfirst=p->pnext;
delete p;

}
else
{
for(List* p=pfirst; p->pnext;p=p->pnext)
if(p->pnext->po->getnum()==nu)
{
List*q=p->pnext;
p->pnext=p->pnext->pnext;
break;
delete q;
}
}


}



void Listoperate:: Find(int nu) //寻找编号为nu的结点并输出
{

for(List* p=pfirst;p;p=p->pnext)

if(p->po->getnum()==nu)
{
p->po->print();
}
}



void Listoperate:: Pri() //输出链表
{
List*p=pfirst;
while(p)
{
p->po->print();
p=p->pnext;
}
}



int main()
{
int n,d;
char g;
people* pn;
doctor doc(1, "张三",28,"内科");
student stu(2,"李四", 21,90);
worker wor(3,"王五",40,5000);
Listoperate Listop;
Listop.Creat((people*)&wor);
Listop.Creat((people*)&stu);
Listop.Creat((people*)&doc);

cout <<"The people list:" <<endl;
Listop.Pri();
//cout <<"Do you want to add some information?('Y'/'N')" <<endl;
//cin>>g;
//if(g=='Y')

Listop.Insert(pn);
Listop.Pri();

cout <<"The new people list:" <<endl;
Listop.Pri();
cout<<"\n\nplease input the number of the people that you Seek:"<<endl;
cin>>n;
cout<<"\n\nfind the people:"<<endl;
Listop.Find(n);
cout<<"\n\nplease input the number of the people that you want to remove:"<<
endl;
cin>>d;
cout <<"\n\nAfter Test Remove function:" <<endl;
Listop.Delete(d);
Listop.Pri();
system("pause");
}



运行时总提示出错，应该是Insert()这个函数错了。但我不知道怎么该。哪位能帮我看看，谢谢啦！

[Longinc]

Up先

[太乙]

# include <iostream> 
#include <string> 

using namespace std; 

//类和继承类 

class people                          //基类 
{ 
private: 
	int number,age; 
	string name; 
public: 
	int getnum(){return number;} 
	people(int num, string s,int i):number(num),name(s),age(i){} 
	virtual void addnode() 
	{int num,i; 
	string s; 
	cout <<"please input the number of the person：\n"; 
	cin>>num; 
	cout <<"please input the name of the person：\n"; 
	cin>>s; 
	cout <<"please input the age of the person：\n"; 
	cin>>i; 
    } 
	virtual void print() 
	{ 
		
		cout << "\nnumber:" <<number 
			<< "\nName:" << name 
			<< "\nage:" << age ; 
		
	} 
	
};   


class doctor: public people        //docter中增加部门 
{int d; 
public: 
	doctor(int num,string s,int i, string d):people(num,s,i),department(d){} 
	
	void addnode() 
	{ 
		people::addnode(); 
		cout <<"please input the department of the doctor：\n"; 
		cin>>d; 
	} 
	
	void print() 
	{ 
		people::print(); 
		cout <<"\ndepartment: " <<department <<endl; 
	} 
	
    
	
private: 
	string department;   
}; 


class student: public people      //student中增加分数 
{int sc; 
public: 
	student(int num,string s,int i,int sc):people(num,s,i),scores(sc){} 
	void addnode() 
	{ 
		people::addnode(); 
		cout <<"please input the scores of the student：\n"; 
		cin>>sc; 
		scores=sc; 
	} 
	void print() 
	{ 
		people::print();  
		cout <<"\nscores: " <<scores <<endl; 
	} 
private: 
	int scores; 
}; 


class worker: public people      //worker中增加工资 
{int sa; 
public: 
	worker(int num,string s, int i,int sa):people(num,s,i){} 
	void addnode() 
	{ 
		people::addnode(); 
		cout <<"please input the salary of the worker：\n"; 
		cin>>sa; 
		salary=sa; 
	} 
	void print() 
	{ 
		people::print();  
		cout <<"\nsalary: " <<salary <<endl; 
	} 
private: 
	int salary; 
};     


class List 
{ 
public: 
	List(people* q):po(q),pnext(0){} 
	people* po;            //指向对象 
	List* pnext;              //指向结点 
}; 



class Listoperate 
{ 
private: 
	List * pfirst;                //链首结点指针 
public: 
	Listoperate():pfirst(0){} 
	void Creat(people*);        //建立初始节点 
	void Delete(int);              //删除结点 
	void Insert(people*);          //插入结点 
	void Find(int);                //寻找结点 
	void Pri();                  //输出链表 
}; 

void Listoperate::Creat(people* pn)      //建立初始节点 
{ 
    
	List* n= new List(pn); 
	
	if (!pfirst) pfirst = n; 
	
	else 
		
	{ 
		
		n->pnext = pfirst; 
		
		pfirst = n; 
		
	} 
} 



void Listoperate::Insert(people* pn)      //插入结点 

{ //int x,z,k; 
	char m; 
	string y,i; 
	doctor* q; 
	student* p; 
	worker* w; 
	
	
	cout <<"\n\n1.doctor  2.worker  3.student " <<endl; 
	cout <<"\n\nplease input the kind of the people that you want to insert:" <<endl; 
	cin>>m; 
	if(m=='1') 
	{ 
		pn=p; 
		pn->addnode(); 
	} 
	
	else 
		if(m=='2')  
		{ 
			pn=w; 
			pn->addnode(); 
		} 
		else    
		{ 
			pn=q; 
			pn->addnode(); 
		} 
		
		
		doctor doc(); 
		worker wor(); 
		student stu(); 
		//Listop.Insert((people*)&doc); 
		//Listop.Insert((people*)&wor); 
		//Listop.Insert((people*)&stu); 
		
		List* n= new List(pn); 
		
		if (!pfirst) pfirst = n; 
		
		else 
			
		{ 
			
			n->pnext = pfirst; 
			
			pfirst = n; 
			
		} 
} 



void Listoperate::Delete(int nu)            //删除结点t 
{  
	List* p=pfirst; 
	if(pfirst->po->getnum()==nu) 
	{ 
		pfirst=p->pnext; 
		delete p; 
		
	} 
	else 
	{ 
		for(List* p=pfirst; p->pnext;p=p->pnext) 
			if(p->pnext->po->getnum()==nu) 
			{ 
				List*q=p->pnext; 
				p->pnext=p->pnext->pnext; 
				break; 
				delete q; 
			} 
	} 
	
	
} 



void Listoperate:: Find(int nu)                //寻找编号为nu的结点并输出 
{ 
	
	for(List* p=pfirst;p;p=p->pnext) 
		
		if(p->po->getnum()==nu) 
		{ 
			p->po->print(); 
		} 
} 



void Listoperate:: Pri()                      //输出链表 
{ 
	List*p=pfirst; 
	while(p)    
	{ 
		p->po->print(); 
		p=p->pnext; 
	} 
} 



int  main() 
{ 
	int n,d; 
	char g; 
	people* pn;  
	doctor doc(1, "张三",28,"内科"); 
	student stu(2,"李四", 21,90); 
	worker wor(3,"王五",40,5000); 
	Listoperate Listop; 
	Listop.Creat((people*)&wor); 
	Listop.Creat((people*)&stu); 
	Listop.Creat((people*)&doc); 
	
	cout <<"The  people list:" <<endl; 
	Listop.Pri(); 
	//cout <<"Do you want to add some information?('Y'/'N')" <<endl; 
	//cin>>g; 
	//if(g=='Y') 
	
	Listop.Insert(pn); 
	Listop.Pri(); 
	
	cout <<"The new people list:" <<endl; 
	Listop.Pri(); 
	cout <<"\n\nplease input the number of the people that you Seek:" <<endl; 
	cin>>n; 
	cout <<"\n\nfind the people:" <<endl; 
	Listop.Find(n); 
	cout <<"\n\nplease input the number of the people that you want to remove:" << endl; 
	cin>>d; 
	cout <<"\n\nAfter Test Remove function:" <<endl; 
	Listop.Delete(d); 
	Listop.Pri(); 
	system("pause"); 
} 
===============================================


void Listoperate::Insert(people* pn)      //插入结点 

{ //int x,z,k; 
	char m; 
	string y,i; 
	doctor* q; 
	student* p; 
	worker* w; 
	
	
	cout <<"\n\n1.doctor  2.worker  3.student " <<endl; 
	cout <<"\n\nplease input the kind of the people that you want to insert:" <<endl; 
	cin>>m; 
	if(m=='1') 
	{ 
		pn=p; //这里，假如我进来了，那么这里的p是NULL啊，下面你又想调用NULL的成员函数，哪儿行！！！
		pn->addnode(); 
	} 
	
	else 
		if(m=='2')  
		{ 
			pn=w; 
			pn->addnode(); 
		} 
		else    
		{ 
			pn=q; 
			pn->addnode(); 
		} 
		
		
		doctor doc(); 
		worker wor(); 
		student stu(); 
		//Listop.Insert((people*)&doc); 
		//Listop.Insert((people*)&wor); 
		//Listop.Insert((people*)&stu); 
		
		List* n= new List(pn); 
		
		if (!pfirst) pfirst = n; 
		
		else 
			
		{ 
			
			n->pnext = pfirst; 
			
			pfirst = n; 
			
		} 
}