class student
{ 
    public : int marks; 
 void disp() 
 { 
  cout<<”its base class”
 };
 class topper:public student
 {
  public : 
  void disp()
  { 
   cout<<”Its derived class”; 
  }
 }
 void main() { student s; topper t;
 s.disp();
 t.disp();
}