#include<iostream>
using namespace std;
#include<conio.h>
//class d;
class a
{private:
int c,b;
public:
a()
{
c=b=4;
}
friend class d;
};
class d
{public:
void sum(a ob)
{
int summ=ob.c+ob.b;
cout<<"sum is"<<summ;
}
};
void main()
{
a ob;
d ob1;
ob1.sum(ob);
_getch();
}
