#include <iostream.h>
#include "student.h"

// illustrate inheritance

class DukeStudent : public Student
{
  public:
    DukeStudent(const string & name);
    virtual void Play();                // new for Duke students
    virtual void Eat();
    virtual void BeAlive();
};


DukeStudent::DukeStudent(const string & name)
  : Student(name)
{
    
}

void DukeStudent::Play()
// post: student has played, loses inergy     
{
    myEnergy -= 10;
    cout << "work hard/play hard" << endl;
}

void DukeStudent::Eat()
{
    cout << "food at Mongolian Grill?" << endl;
    Student::Eat();
}

void DukeStudent::BeAlive()
{
    Student::BeAlive();
    Play();
}


void DoSchool(Student & s)
//      
{
    while (s.IsAlive())
    {
        s.BeAlive();
        cout << endl << s.Name() << ": energy = " << s.Energy() << endl;
    }
}


int main()
{
    Student normal("Pat");
    DukeStudent super("Chris");

    DoSchool(normal);
    DoSchool(super);

    return 0;
}