1 //多继承语法 C++中允许一个类继承多个类

 2 #include <iostream>

 3 #include <string>

 4 using namespace std;

 5

 6 class Base1

 7 {

 8 public:

 9     Base1()

10     {

11         m_A = 100;

12     }

13     int m_A;

14 };

15

16 class Base2

17 {

18 public:

19     Base2()

20     {

21         m_A = 200;

22     }

23     int m_A;

24 };

25

26 //子类 需要继承Base1 和 Base2

27 //语法：class 子类 ：继承方式 父类1 逗号，继承方式 父类2......

28 class Son :public Base1, public Base2

29 {

30 public:

31     Son()

32     {

33         m_C = 300;

34         m_D = 400;

35     }

36     int m_C;

37     int m_D;

38 };

39

40 void test01()

41 {

42     Son s;

43     cout << "sizeof Son = " << sizeof(s) << endl;  //16

44

45     //当父类中出现同名成员 需要加作用域区分

46     cout << "Base1-m_A = " << s.Base1::m_A << endl;

47     cout << "Base2-m_A = " << s.Base2::m_A << endl;

48 }

49 int main()

50 {

51

52     test01();

53

54

55     system("pause");

56

57     return 0;

58

59 }