Access Modifiers

Access Modifiers

Public, Private, Protected are the access modifiers.

1. Public: Can access any place.

2. Private: Only in Same.

3. Protected:  In same class + Child Class.

Uses of access modifiers are as follows:

#include<iostream.h>

#include<conio.h>

//base class

class student

{

          protected:

                   int x;

          public:

                   void display()

                   {

                             cout<<” base class”;

                   }

};

class collegemember: public student

{

          public :

                   void display1()

                   {

                             x=9848;

                   }

                   cout<<x;

};

void main()

{

          clrscr();

          collegemember   y;

          y.display();

          y.display1();

          getch();

}

Inheritance and Constructor :

Constructor caliing : top to bottom.

 At first will call base class constructor, then will call child class constructor.

Inheritance and method :

Method calling : bottom to top.

E.g.:

#include<iostream.h>

#include<conio.h>

class a

{

          public :

                   a()

                   {

                             cout<<”base class constructor”;

                   }

                   void display()

                   {

                                      cout<<”hello base class”;

                   }

};

class b : public a

{

public:

          b()

          {

                   cout<<”child class”;

          }

          void display()

          {

                   cout<<”hello child class”;

          }

};

void main()

{

          clrscr();

          b   z;

          z.display();

          getch();

}