Re: // how can I access A::a?

        /* multi_level_inheritance.cpp */
        struct A
        {
            int a;
        };

        struct B1 : public A
        {
            int a;
        };

        struct B2 : public A
        {
            int a;
        };

        struct C : public B1, public B2
        {
            int a;
        };

        int main()
        {
            C ccc;

            ccc.a=123;

            ccc.B1::a=456;

/* 0030 */ ccc.B1::A::a=789;

        }

// c++ multi_level_inheritance.cpp
// multi_level_inheritance.cpp: In function int main():
// multi_level_inheritance.cpp:30: error: A is an ambiguous base of C

// how can I access A::a?