Question about Virtual Inheritance hierarchy
- by Summer_More_More_Tea
Hi there:
I encounter this problem when tackling with virtual inheritance. I remember that in a non-virtual inheritance hierarchy, object of sub-class hold an object of its direct super-class. What about virtual inheritance? In this situation, does object of sub-class hold an object of its super-class directly or just hold a pointer pointing to an object of its super-class?
By the way, why the output of the following code is:
sizeof(A): 8
sizeof(B): 20
sizeof(C): 20
sizeof(C): 36
Code:
#include <iostream>
using namespace std;
class A{
char k[ 3 ];
public:
virtual void a(){};
};
class B : public virtual A{
char j[ 3 ];
public:
virtual void b(){};
};
class C : public virtual B{
char i[ 3 ];
public:
virtual void c(){};
};
class D : public B, public C{
char h[ 3 ];
public:
virtual void d(){};
};
int main( int argc, char *argv[] ){
cout << "sizeof(A): " << sizeof( A ) << endl;
cout << "sizeof(B): " << sizeof( B ) << endl;
cout << "sizeof(C): " << sizeof( C ) << endl;
cout << "sizeof(D): " << sizeof( D ) << endl;
return 0;
}
Thanks in advance.
Kind regards.
