Write a program to Read & Display 4 Number in Virtual Base Class

Write a program to Read & Display 4 Number in Virtual Base Class

#include<iostream.h>
#include<conio.h>

class A
{
protected:
int a1;
};
class B1: virtual public A
{
protected:
int a2;
};
class B2: virtual public A
{
protected:
int a3;

};


class C: public B1, public B2
{
int a4;
public:
void getdata()
{
cout<<"enter four no.";
cin>>a1>>a2>>a3>>a4;
}
void putdata()
{
cout<<"a1="<<a1<<"a2="<<a2<<"a3="<<a3<<"a4="<<a4;
}
};
void main()
{
C obj;
obj.getdata();
obj.putdata();
getch();
}