Answer Posted / ragib nasir ahmed

A virtual base class is one in which only one copy of the
base class is inherited to the derived class.
Let us consider the classes A,B,C,D
class A
{
int a;
public:
void geta(void)
{
a=10;
}
};
class B: public virtual A
{
int b;
public:
void getb(void)
{
b=20;
}
};
class C:virtual public A
{
int c;
public:
void getc(void)
{
c=30;
}
};
class D:public B,public C
{
public:
void display(void)
{
cout<<a<<b<<c<<d;
}
};

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