CReference2.cpp

/*
    CRerference2.cpp
*/

#include <iostream>

using std::cout;
using std::endl;

class Person
{
public :
    void Sleep() const
    {
        cout<<"Sleep"<<endl;
    }
};

class Student : public Person
{
public :
    void Study() const
    {
        cout<<"Study"<<endl;
    }
};

class PartTimeStd : public Student
{
public :
    void Work() const
    {
        cout<<"Work"<<endl;
    }
};

int main(void)
{
    PartTimeStd p;
    p.Sleep();
    p.Study();
    p.Work();

    Person& ref = p;
    ref.Sleep();
    //ref.Study();
    //ref.Work();

    return 0;
}