class Student
{
public:
   void GradeReport() const;	// print the header info
};

class Grad : public Student
{
public:
   void GradeReport() const;	// print the FULL report

};

class Undergrad : public Student
{
public:
   void GradeReport() const;

};

--------------------------

void Student::GradeReport() const
{
   // print header info -- name, address, ssn, etc.
}

void Grad::GradeReport() const
{
   Student::GradeReport();	// do common work -- report header outputs
   // print things that are specific to grad students (thesis, etc)
}

void Undergrad::GradeReport() const
{
   Student::GradeReport();	// do common work -- report header outputs
   // print things that are specific to undergrad students (like general studies requirements)
}