C++下实现同接口下多个类作为参数的调用和传参

 /*
          实现同接口下不同类的对象的转移
         定义类的接口
         定义多个继承该接口的类
         定义管理类，把接口当作类型，
         传入该接口下各种类的对象，进行操作
 */
 #include<iostream>
 #include<map>
 #include<cstdlib>
 using namespace std;
 template<typename keyType,typename valueType>
 struct Node{
     keyType key;
     valueType value;
     Node *next;
 };
 template<typename keyType,typename valueType>
 class List
 {
     public:
         List()
         {
             tail=accom=mallocmemory();//initialize head node
         }
         void Add(keyType key,valueType value){
             Node<keyType,valueType> *nd=mallocmemory();
             nd->key=key;
             nd->value=value;
             tail->next=nd;
             tail=tail->next;
         }
         valueType Get(keyType key,bool del=false)
         {
             Node<keyType,valueType> *record,*temp=accom->next;
             valueType t;
             while(temp!=NULL&&temp->key!=key)
             {
                 temp=temp->next;
             }
             t=temp->value;
             if(del)
             {
                 record=accom;
                 while(record->next!=temp)
                 record=record->next;
                 record=temp->next;
                 free(temp);
             }
             return t;
         }
         bool Exist(keyType key)
         {
             Node<keyType,valueType> *temp=accom->next;
             while(temp!=NULL&&temp->key!=key)
             {
                 temp=temp->next;
             }
             if(temp==NULL)
             return false;
             return true;
         }
         valueType RemoveById(keyType id)
         {
             return Get(id,true);
         }
     private:
         Node<keyType ,valueType> *mallocmemory(){
             Node<keyType,valueType> *nd=(Node<keyType,valueType>*)malloc(sizeof(Node<keyType,valueType>));
             nd->next=NULL;
             return nd;
         }
         Node<keyType,valueType> *accom,*tail;
 };
 class IPerson{
     public:
         virtual void SetName(string name)=;
         virtual void SetAge(int age)=;
         virtual void ShowInfo()=;
 };
 class Student:public IPerson
 {
     public:
         void SetName(string name)
         {
             Name=name;
         }
         void SetAge(int age)
         {
             Age=age;
         }
         void ShowInfo()
         {
             cout<<"学生信息："<<endl;
             cout<<"\tName: "<<Name<<endl;
             cout<<"\tAge : "<<Age<<endl;
         }
     private:
         string Name;
         int Age;
 };
 class Parent:public IPerson
 {
     public:
         void SetName(string name)
         {
             Name=name;
         }
         void SetAge(int age)
         {
             Age=age;
         }
         void ShowInfo()
         {
             cout<<"家长信息："<<endl;
             cout<<"\tName: "<<Name<<endl;
             cout<<"\tAge : "<<Age<<endl;
         }
     private:
         string Name;
         int Age;
 };
 class Teacher:public IPerson
 {
     public:
         void SetName(string name)
         {
             Name=name;
         }
         void SetAge(int age)
         {
             Age=age;
         }
         void ShowInfo()
         {
             cout<<"老师信息："<<endl;
             cout<<"\tName: "<<Name<<endl;
             cout<<"\tAge : "<<Age<<endl;
         }
     private:
         string Name;
         int Age;
 };
 class Manager{
     public:
         Manager()
         {
             curPer=NULL;
         }
         void SetName(string name)
         {
             curPer->SetName(name);
         }
         void SetAge(int age)
         {
             if(curPer==NULL)cout<<"农夫"<<endl;
             else
             curPer->SetAge(age);
         }
         void ShowInfo()
         {
             curPer->ShowInfo();
         }
         void AddPeople(int id,IPerson *person)
         {
             per.Add(id,person);
         }
         void ChangeState(int id)
         {
             if(per.Exist(id))
             curPer=per.Get(id);
             else
             cout<<"没有找到这个栈"<<endl;
         }
     private:
         List<int,IPerson*> per;
         IPerson *curPer;
 };
 int main()
 {
     Parent one;
     Student stu;
     Teacher tea;
     Manager manage;
     manage.AddPeople(,&one);
     manage.AddPeople(,&stu);
     manage.AddPeople(,&tea);

     manage.ChangeState();
     manage.SetAge();
     manage.SetName("jiazhang");

     manage.ChangeState();
     manage.SetAge();
     manage.SetName("xuesheng");

     manage.ChangeState();
     manage.SetAge();
     manage.SetName("laoshi");
     for(int i=;i>;i--) {
     manage.ChangeState(i);
     manage.ShowInfo();}

     return ;
 }