1 #include <stdio.h> 2 #include <memory> 3 4 class Extra 5 { 6 public: 7 Extra (int in_one, int in_two) : m_extra_one(in_one), m_extra_two(in_two) {} 8 9 private: 10 int m_extra_one; 11 int m_extra_two; 12 }; 13 14 class A 15 { 16 public: 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 36 private: 37 int m_a_value; 38 std::auto_ptr<A> m_client_A; 39 }; 40 41 class B : public Extra, public virtual A 42 { 43 public: 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 49 private: 50 int m_b_value; 51 }; 52 53 static A* my_global_A_ptr; 54 55 int 56 main (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
