C++_练习—继承

C++_练习—继承_多继承

多继承

多继承：派生类继承多个基类（继承多父类特性）

语法：class <派生类名>: <继承方式1><基类名1> , <继承方式2><基类名2> , ...{
<派生类类体>;
}

 1 #include <iostream>
 2 
 3 using namespace std;
 4 
 5 class info1 {
 6 public:
 7     void setter1(int a) {
 8         num1 = a;
 9     }
10 
11 protected:
12     int num1;
13 
14 private:
15     int age1;
16 };
17 
18 class info2 {
19 public:
20     void setter2(int a) {
21         num2 = a;
22     }
23 
24 protected:
25     int num2;
26 
27 private:
28     int age2;
29 
30 };
31 
32 class info : public info1, public info2 {
33 public:
34     void fun(void) {
35         int a;
36         a = num1 + num2;
37         cout << a << endl;
38     }
39 
40 protected:
41     int num3;
42 
43 private:
44     int age3;
45 };
46 
47 
48 int main(void)
49 {
50     info text;
51 
52     /*   text.num1;   由于多继承方式为public，所以派生类不能直接访问protected与private
53          text.age2;
54     */
55 
56 
57     text.setter1(33);
58     text.setter2(44);
59     text.fun();
60 
61     return 0;
62 }