c++继承中的对象模型

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 
 4 class father
 5 {
 6 public:
 7     int a;
 8 protected:
 9     int b;
10 private:
11     int c;
12 };
13 
14 class son1:public father
15 {
16 public:
17     int d;
18 };
19 
20 class son2:protected father
21 {
22 public:
23     int d;
24 };
25 
26 class son3:private father
27 {
28 public:
29     int d;
30 };
31 void test()
32 {
33     son1 s1;
34     cout << "size of s1 is " << sizeof(s1) << endl;
35 
36     son2 s2;
37     cout << "size of s2 is " << sizeof(s2) << endl;
38 
39     son3 s3;
40     cout << "size of s3 is " << sizeof(s3) << endl;
41 }
42 
43 int main()
44 {
45     test();
46     return 0;
47 }