// p227.cpp - Pointer conversions, Section 7.2.4


class FString {   };

class Student {
public:
  //...
private:
  long id;
};

class GraduateStudent :public Student {
public:
  //...
private:
  FString thesisTitle;
};

void CalcTuition( Student & S )
{
  // sp is a Student or a derived object
}

void RecordThesis( GraduateStudent * p )
{
  //...
}

int main()
{

Student * sp;
GraduateStudent * gp;
//...
sp = gp;
//...
RecordThesis( (GraduateStudent *) sp );

return 0;
}