1#include <stdio.h>
2#include <memory>
3
4class Extra
5{
6public:
7  Extra (int in_one, int in_two) : m_extra_one(in_one), m_extra_two(in_two) {}
8
9private:
10  int m_extra_one;
11  int m_extra_two;
12};
13
14class A
15{
16public:
17  A(int value) : m_a_value (value) {}
18  A(int value, A* client_A) : m_a_value (value), m_client_A (client_A) {}
19
20  virtual ~A() {}
21
22  virtual void
23  doSomething (A &anotherA)
24  {
25    printf ("In A %p doing something with %d.\n", this, m_a_value);
26    int tmp_value = anotherA.Value();
27    printf ("Also have another A at %p: %d.\n", &anotherA, tmp_value); // Break here in doSomething.
28  }
29
30  int
31  Value()
32  {
33    return m_a_value;
34  }
35
36private:
37  int m_a_value;
38  std::auto_ptr<A> m_client_A;
39};
40
41class B : public Extra, public virtual A
42{
43public:
44  B (int b_value, int a_value) : Extra(b_value, a_value), A(a_value), m_b_value(b_value) {}
45  B (int b_value, int a_value, A *client_A) : Extra(b_value, a_value), A(a_value, client_A), m_b_value(b_value) {}
46
47  virtual ~B () {}
48
49private:
50  int m_b_value;
51};
52
53static A* my_global_A_ptr;
54
55int
56main (int argc, char **argv)
57{
58  my_global_A_ptr = new B (100, 200);
59  B myB (10, 20, my_global_A_ptr);
60  B *second_fake_A_ptr = new B (150, 250);
61  B otherB (300, 400, second_fake_A_ptr);
62
63  myB.doSomething(otherB); // Break here and get real addresses of myB and otherB.
64
65  A reallyA (500);
66  myB.doSomething (reallyA);  // Break here and get real address of reallyA.
67
68  return 0;
69}
70