calling base class function from derived class object

1#include <iostream>
2#include <string>
3
4using namespace std;
5
6class Person{
7public:
8    void introduce(){
9    cout <<"hey from person"<<endl;
10    }
11};
12
13class Student : public Person{
14public:
15    void introduce(){
16    cout <<"hey from student"<<endl;
17    }
18};
19
20void whosThis(Person &p){
21p.introduce();
22}
23
24int main()
25{
26    Student anil;
27    anil.introduce();
28    whosThis(anil);
29    return 0;
30}
31
32