test.cc

#include <iostream>

class A {
  public:
    void method() {
	std::cout << "A::method" << std::endl;
    }
    virtual void vmethod() {
	std::cout << "A::vmethod" << std::endl;
    }
};
class B {
  public:
    void method() {
	std::cout << "B::method" << std::endl;
    }
    virtual void vmethod() {
	std::cout << "B::vmethod" << std::endl;
    }
};

class C {};

class D: public A, B, C {};

int main() {
    D d;
    std::cout << (A*)&d << std::endl;
    std::cout << (B*)&d << std::endl;
    std::cout << (C*)&d << std::endl;

    ((A*)&d)->A::method();
    ((B*)&d)->B::method();
    ((A*)&d)->method();
    ((B*)&d)->method();
    ((A*)&d)->A::vmethod();
    ((B*)&d)->B::vmethod();
    ((A*)&d)->vmethod();
    ((B*)&d)->vmethod();
    return 0;
}