1 #include<iostream>
2 using namespace std;
3
4 class Base1
5 {
6 public:
7 Base1()
8 {
9 cout << "class Base1" << endl;
10 }
11 };
12
13 class Base2
14 {
15 public:
16 Base2()
17 {
18 cout << "class Base2" << endl;
19 }
20 };
21
22 class Level1:public Base2,virtual public Base1
23 {
24 public:
25 Level1()
26 {
27 cout << "class Level1" << endl;
28 }
29 };
30
31 class Level2:public Base2,virtual public Base1
32 {
33 public:
34 Level2()
35 {
36 cout << "class Level2" << endl;
37 }
38 };
39
40 class TopLevel:public Level1,virtual public Level2
41 {
42 public:
43 TopLevel()
44 {
45 cout << "class TopLevel" << endl;
46 }
47 };
48
49 int main()
50 {
51 TopLevel obj;
52 }
执行结果
class Base1
class Base2
class Level2
class Base2
class Level1
class TopLevel
结论：
虚基类的构造函数优先执行
