Class B

base_code/virtual_base.cpp:22–41

};

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

    void* operator new(size_t size) {
        void *p = malloc(size);
        cout << "operator new p: " << p << endl;
        return p;
    }

    void operator delete(void *ptr) {
        cout << "B::opeartor delete p: " << ptr << endl;
        free(ptr);
    }
private:
    int mb;
};


int main()