Inheritance

#include <iostream>

using namespace std;

class Person{
protected:
    string name;
private:
    int age;
public:
    void setName(string iname){ name = iname;}
    void setAge(int iage){ age = iage;}
    Person(){
        cout << "Person constructor called!" << endl;
    }
    ~Person(){
        cout << "Person deconstructor called!"<< endl;
    }
};


class Student : public Person{
protected:
    int ID;
public:
    void setId(int iID) {ID = iID;}

    void introduce (){
    name = "John"; // derived class has access to protected stuffs from base class
    //age = 21; // but cannot access private stuffs from base class
    cout << "Hi, my name is "<< name << " and I'm " << age << endl
    << "My student ID is " << ID<<endl;
    }
    Student(){
        cout << "Student constructor called!" <<endl; // Person's constructor is executed first then Student's constructor
    }
    ~Student(){
        cout << "Student deconstructor called!" <<endl; // Student's deconstructor is executed first then Person's deconstructor
    }
};
int main()
{
    Student MK;
    MK.setName("Ken");
    MK.setAge(20);
    MK.setId(3072);

    MK.introduce(); // John

    return 0;
}