C++ //多继承语法 C++中允许一个类继承多个类

 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 }