Vector of object pointers and virtual methods

Vector of object pointers and virtual methods

First of all sorry if i've chosen wrong title, but wasn't sure how to name
it.
Code structure first:
//== 1st file ==
class A {
private:
int x;
public:
int GetX() { return x; }
}
//== 2nd file ==
class B {
private:
A ob1;
public:
virtual A & GetARef() { return ob1; }
}
class C : public B {
private:
A ob2;
public:
A & GetARef() { return ob2; }
}
class D : public B {
public:
// something else w/e
}
//== 3rd file ==
class E {
private:
std::map <UINT,C> m;
public:
C* GetCPtr(int idx) { retrun &m[idx]; }
}
//== 4th file ==
void foo(E & E_Obj) {
std::vector <B*> v;
v.push_back(D_Obj.GetCPtr(0));
v.push_back(/*some pointer to D class*/);
Boo(v); // FORGOT TO ADD IT ! Sorry
}
//== 5th file ==
void Boo(std::vector <B*> & v) {
std::cout << v[0]->GetARef().GetX(); // returns B::ob1 's x instead of
C::ob2 's x.
}
As wrote in comments, Boo gets wrong 'x'. I just wonder if it's because
that pointers go 'out of scope' or I misdesigned something wrong. How to
fix that, so I can get proper x (C::ob2 's one).
Sorry for kinda strange class names etc., but orginal code is much longer,
so I tried to show the situation only.
@edit Forgot to add that in Foo() it returns what i expect - C::ob2 's x.