#include <iostream>
using namespace std; 
 
class A 
{
    int roll;
    public:
    void getroll()
    {cout<<"\n enter roll number: ";
    cin >> roll;
    }
};
class B : public A 
{
    int sub1, sub2;
    public :
    void getmarks()
    {
        cout<<"\n enter marks of sub1 sub 2:";
        cin>> sub1>> sub2;
 
        void getmarks()
 
            {cout<<"\n enter marks1 =:"<<sub1
        <<"\n marks2=:" <<sub2;
            }
    }
};
class c : public B 
int total;
public:
void getsptm()
{cout<<"\n enter sptm:";
cin>> sptm
}
void total()
{
put roll();
put marks();
c or <<"\n total marks="<<sub1 + sub2 + sptm;
};
 
int main()
{ 
    c o;
 
    o.getroll()
    o.getmarks()
    o.getsptm()
    o.total()
 
    return 0;
}
 

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