(1)基类的静态成员函数和静态数据成员都可以被继承。
1 #include <iostream>
2 #include <string>
3
4 using namespace std;
5
6 class People
7 {
8 public:
9 People() {}
10 ~People() {}
11 static void show(void);
12 static int tall;
13 };
14
15 void People::show(void)
16 {cout << "The peole!" << endl;}
17
18 int People::tall = 170;
19
20 class Student : public People
21 {
22 public:
23 void gotoSchool(void) {cout << "Go to school!" << endl;}
24 };
25
26 int main(int argc, char *argv[])
27 {
28 Student Jack;
29 Jack.gotoSchool();
30 Student::show();
31 cout << Student::tall << endl;
32
33 return 0;
34 }
(2)友元函数不可以被继承。
1 #include <iostream>
2 #include <string>
3
4 using namespace std;
5
6 class People
7 {
8 public:
9 People() : tall(0) {}
10 ~People() {}
11
12 friend void showInfo(const People& p)
13 {cout << "The tall: " << p.tall << endl;}
14 static void show(void);
15 private:
16 int tall;
17 };
18
19 class Student : public People
20 {};
21
22 int main(int argc, char *argv[])
23 {
24 Student Jack;
25 showInfo(Jack); // 这里友元函数访问了派生类对象
26
27 return 0;
28 }
(3)友元类可以不被继承
原文链接: https://www.cnblogs.com/Robotke1/archive/2013/04/27/3046142.html
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