PROGRAM FOR MULTILEVEL INHERITANCE

//program for multilevel inheritance
#include<iostream.h>
#include<conio.h>
class student
{
  protected:
   int rollno;
  public:
void getdata(int rn)
{
  rollno=rn;
}
void putdata()
{
  cout<<"rollno="<<rollno<<endl;
}
};
class test:public student
{
  protected:
   float sub1;
   float sub2;
  public:
void getm(float s1,float s2)
{
   sub1=s1;
   sub2=s2;
}
void putm()
{
  cout<<"marks in sub1:"<<sub1<<endl;
  cout<<"marks in sub2:"<<sub2<<endl;
}
};
class result:public test
{
   float total;
   public:
 void display();
};
void result::display()
{
  total=sub1+sub2;
  putdata();
  putm();
  cout<<"total:"<<total<<endl;
}
void main()
{
  result r;
  clrscr();
  r.getdata(111);
  r.getm(75.0,59.5);
  r.display();
  getch();
}