基类与派生类中有同名函数

 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,string,float);
10         void display();
11     protected:
12         int num;
13         string name;
14         float score;
15 };
16 
17 Student::Student(int n,string nam,float s)
18 {
19     num=n;
20     name=nam;
21     score=s;
22 }
23 
24 void Student::display()
25 {
26     cout<<"num:"<<num<<"
name:"<<name<<"
score:"<<score<<"

";
27 }
28 
29 class Graduate:public Student
30 {
31     public:
32         Graduate(int,string,float,float);
33         void display();
34     private:
35         float pay;
36 };
37 
38 void Graduate::display()
39 {
40     cout<<"num:"<<num<<"
name:"<<name<<"
score:"<<score<<"
pay="<<pay<<endl;
41 }
42 
43 Graduate::Graduate(int n,string nam,float s,float p):Student(n,nam,s),pay(p){
44     
45 }
46 int main(int argc, char** argv) {
47     Student stud1(1001,"li",88);
48     Graduate grad1(2001,"wang",99,555);
49     Student *pt=&stud1;
50     pt->display();
51     pt=&grad1;
52     pt->display();
53     return 0;
54 }