内存偏移

 1 #include "stdafx.h"
 2 
 3 class A
 4 {
 5 public:
 6     A(){m_a = 1; m_b = 2;}
 7     void fun(){printf("%d %d\n", m_a, m_b);}
 8 private:
 9     int m_a;
10     int m_b;
11 };
12 
13 class C
14 {
15 public:
16     C(){m_c = 3;}
17     void fun(){printf("%d\n", m_c);}
18 private:
19     int m_c;
20 };
21 
22 int _tmain(int argc, _TCHAR* argv[])
23 {
24     A a;    
25     C c;
26     printf("0x%p\n", &a);
27     printf("0x%p\n", &c);
28     
29     C *pc = (C *)&a;
30     printf("0x%p\n", pc);
31 
32     pc->fun();
33 
34     return 0;
35 }