C++入门--继承

时间：2020-11-02 09:53:37 阅读：22 评论：0 收藏：0 [点我收藏+]

举例：

 1 #include <iostream>
 2 
 3 class CPerson {
 4 public:
 5     CPerson() {}
 6     ~CPerson() {}
 7     //获取性别
 8     int GetGender() {
 9         return m_nGender;
10     }
11     //设置性别
12     void SetGender(int nGender) {
13         m_nGender = nGender;
14     }
15 private:
16     char m_szName[255];
17     int m_nGender;
18 };
19 
20 class CStudent
21 {
22 public:
23     CStudent() {}
24     ~CStudent() {}
25     CPerson m_per;  //把一个类放到另一个类里做成员--组合关系
26 private:
27     int m_nStuID;
28 };
29 
30 class CTeacher
31 {
32 public:
33     CTeacher() {}
34     ~CTeacher() {}
35     CPerson m_per;
36 private:
37     int m_TeaID;
38 };
39 
40 int main()
41 {
42     CStudent stu;
43     stu.m_per.SetGender(1);
44     return 0;
45 }

在上面我们通过在学生类与教师类中包含person类，来使他们获取person的一些属性。这种关系，我们称之为组合关系

#include <iostream>

class CPerson {
public:
    CPerson() {}
    ~CPerson() {}

    int GetGender() {
        return m_nGender;
    }

    void SetGender(int nGender) {
        m_nGender = nGender;
    }
private:
    char m_szName[255];
    int m_nGender;
};

class CStudent:public CPerson
{
public:
    CStudent() {}
    ~CStudent() {}
private:
    int m_nStuID;
};

class CTeacher:public CPerson
{
public:
    CTeacher() {}
    ~CTeacher() {}
private:
    int m_TeaID;
};

int main()
{
    CStudent stu;
    stu.SetGender(1);
    return 0;
}