1 #include <iostream>
2 #include <string.h>
3 /* run this program using the console pauser or add your own getch, system("pause") or input loop */
4 using namespace std;
5
6 class Student
7 {
8 public:
9 Student(int n,string nam)
10 {
11 num=n;
12 name=nam;
13 }
14 void display()
15 {
16 cout<<"num:"<<num<<endl;
17 cout<<"name:"<<name<<endl;
18 }
19
20 protected:
21 int num;
22 string name;
23 };
24
25 class Student1:public Student
26 {
27 public:
28 Student1(int n,string nam,int a):Student(n,nam)
29 {
30 age=a;
31 }
32 void show()
33 {
34 display();
35 cout<<"age:"<<age<<endl;
36 }
37 private:
38 int age;
39 };
40
41 class Student2:public Student1
42 {
43 public:
44 Student2(int n,string nam,int a ,int s):Student1(n,nam,a)
45 {
46 score=s;
47 }
48 void show_all()
49 {
50 show();
51 cout<<"score:"<<score<<endl;
52 }
53 private:
54 int score;
55 };
56
57 int main(int argc, char** argv) {
58 Student2 stud(10010,"li",17,89);
59 stud.show_all();
60 return 0;
61 }
