#include <stdio.h>
 
class D
{
 
};
 
class C
{
public:
    char szPointerSize_0x4; // 4
};
 
class B : public C, public D // Size would only be 0x4 with 1 inherited class
{
public:
    char szPointerSize_0x8; // 8
};
 
class A : virtual public B // Size would only be 0x8 if it I removed virtual
{
public:
    char szPointerSize_0xC; // 12
};
 
int main()
{
    size_t APtr = sizeof(unsigned long(A::*)());
    size_t BPtr = sizeof(unsigned long(B::*)());
    size_t CPtr = sizeof(unsigned long(C::*)());
 
    printf("A: %d\nB: %d\nC: %d\n", APtr, BPtr, CPtr);
 
    return 0;
}

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