Programs on Access specifier (public,private,protected) in c++

 Program on Access specifier 

(public,private,protected) 

	WITHIN CLASS	OUTSIDE CLASS	DERIVED CLASS
PUBLIC	YES	YES	YES
PRIVATE	YES	NO	NO
PROTECTED	YES	NO	YES

Program on Access specifier (public)

#include<iostream.h>

#include<conio.h>

class accspe

{

 public:

 int x;

 private:

 int y;

 protected:

 int z;

};

void main()

{

 clrscr();

 accspe as;

 cout<<"enter x public value:"<<endl;

 cin>>as.x;

 cout<<"x public value:"<<as.x<<endl;

 getch();

}

Program on Access specifier (private)

#include<iostream.h>

#include<conio.h>

class accspe

{

 public:

 int x;

 private:

 int y;

 protected:

 int z;

 public:

 void display()

 {

   y=20;

   cout<< "y value can be seen if 

               it is inside the class private:"<<y<<endl;

 }

};

void main()

{

 clrscr();

 accspe as;

 cout<<"enter x public value:"<<endl;

 cin>>as.x;

 cout<<"x public value:"<<as.x<<endl;

/* cout<<"enter y private value:"<<endl;

 cin>>as.y;

 cout<<"y private value:"<<as.y<<endl;

 */         we will get error if we remove comment

 as.display();

 getch();

}

Program on Access specifier (protected)

#include<iostream.h>

#include<conio.h>

class accspe

{

 public:

 int x;

 private:

 int y;

 protected:

 int z;

 public:

 void display()

 {

   y=20;

   cout<< "y value can be seen if it is inside the class private:"<<y<<endl;

 }

};

class derived : public accspe

{

  public:

  void show()

  {

  z=30;

  cout<< "z value Potected is "<<z<<endl;

  }

};

void main()

{

 clrscr();

 accspe as;

 cout<<"enter x public value:"<<endl;

 cin>>as.x;

 cout<<"x public value:"<<as.x<<endl;

/* cout<<"enter y private value:"<<endl;

 cin>>as.y;

 cout<<"y private value:"<<as.y<<endl;

 */

 as.display();

 derived d;

 d.show();

 getch();

}