class BaseA
{
public:
    int a;
};
 
class BaseB
{
public:
    double b;
};
 
class Derived : public BaseA, public BaseB
{
};
 
int main(int argc, char const *argv[])
{
    Derived derivd;
    Derived* pd = &derivd;
    BaseB* pb = &derivd;
    printf("pb = %p\n", pb);
    printf("pd = %p\n", pd);
    if (pb == pd)
    {
        printf("pb == pd\n");
    }
    else
    {
        printf("pb != pd\n");
    }
}