Date、Person、Student 、Teacher完成多态和非多态的代码编写

定义生日类Date、人类Person、学生类Student 、教师类Teacher，自行设计成员函数，完成多态和非多态的代码编写；

利用组合派生即可；

#include<iostream>
#include<cstring>    
         
using namespace std;

class Date            // Date
{
    private:
        int year,month,day;
    public:
        Date(int year_ = 1,int month_ = 1,int day_ = 1):year(year_),month(month_),day(day_)    {     }
        ~Date();
        void Dateprint();
};

Date::~Date()
{
    cout<<"~ ~ ~destructor Date Year Month Day  "<<endl;
}

void Date::Dateprint()
{
    cout<<"@@Date::Dateprint@@"<<endl;
}

                        //
class Person            // Person 
{
    private:
        Date date;
        string name;
        int age;
    public:
        Person(int year_ ,int month_ ,int day_ ,string name_ = "NULL", int age_ = 0)
        :date(year_,month_,day_),name(name_),age(age_)     { }
        ~Person();
        virtual void Print();
        void Print_out();
};

Person::~Person()
{
    cout<<"~ ~ ~destructor Person Name Age  "<<endl;
}

void Person::Print()
{
    cout<<"@@virtual void Print@@"<<endl<<endl;;
}

void Person::Print_out()
{
    cout<<"@@void Print_out@@"<<endl<<endl;;
}

                                //
class Student:public Person        // Student
{
    private:
        string id;
        double avgscore;
    public:
        Student(int year_,int month_,int day_,string name_,int age_,string id_ = "NULL",double avgscore_ = 0)
        :Person(year_,month_,day_,name_,age_),id(id_),avgscore(avgscore_){    }        
        ~Student();
        virtual void Print();
        void Print_out();
};

Student::~Student()
{
    cout<<"~ ~ ~Student  Id Avgscore  "<<endl;
}

void Student::Print()
{
    cout<<"@@Student::Print@@"<<endl<<endl;
}

void Student::Print_out()
{
    cout<<"@@Student::Print_out@@"<<endl<<endl;
}

                                    //
class Teacher:public Person            // Teacher
{
    private:
        int neb_student;
    public:
        Teacher(int year_,int month_,int day_,string name_,int age_,int neb_student_ = 0)
        :Person(year_,month_,day_,name_,age_),neb_student(neb_student_)    { }
        ~Teacher();
        virtual void Print();
        void Print_out();        
};

Teacher::~Teacher()
{
    cout<<"~ ~ ~destructor Teacher neb_student "<<endl;
}

void Teacher::Print()
{
    cout<<"@@Teacher::Print@@"<<endl<<endl;
}

void Teacher::Print_out()
{
    cout<<"@@Teacher::Print_out@@"<<endl<<endl;
}


int main()
{
    string name0,id0;
    int year0,month0,day0,age0,neb_student0;
    double avgscore0;
    
    cout<<"please Student>>year>>month>>day>>name>>age>>id>>avgscore"<<endl;
    
    cin>>year0>>month0>>day0>>name0>>age0>>id0>>avgscore0;
    
    Student hujun(year0,month0,day0,name0,age0,id0,avgscore0);
    
    cout<<"please Teacher>>year>>month>>day>>name>>age>>neb_student"<<endl;
    
    cin>>year0>>month0>>day0>>name0>>age0>>id0>>neb_student0;
    
    Teacher HJ(year0,month0,day0,name0,age0,neb_student0);
    
    Person *pt1;
    
    pt1 = &hujun ;
    pt1->Print() ;
    pt1->Print_out() ;
    pt1 = &HJ;
    pt1->Print() ;
    pt1->Print_out() ;
    
    hujun.Print() ;
    hujun.Print_out() ;
    HJ.Print() ;
    HJ.Print_out() ;
    
    return 0;
}