Difference Between (PRivate , Public and Protected )

Difference Between Private, Public & Protected Class

 Private:- Access only With in the class , Not in Derived class & main

 Protected:- Access only With in the class & Derived class & but not in main

Public:- Access only With in the class , Derived class & main

Program 

#include<iostream.h>

#include<conio.h>

class base

{

private:

int a;

protected :

int b;

public:

int c;

void getdata(int x,int y,int z)

{

a=x;

b=y;

c=z;

}

void display()

{

cout<<"\n a="<<a;

cout<<"\n b="<<b;

cout<<"\n c="<<c;

}

};

class derive :public base

{

public:

void display1()

{

//cout<<"\n a="<<a;

cout<<"\n b="<<b;

cout<<"\n c="<<c;

}

};

main()

{

clrscr();

derive d1;

d1.getdata(4,5,6);

cout<<"\n================= BAse(Private can b access)=============";

d1.display();

cout<<"\n==============Derive (Proteceted can b access)=============";

d1.display1();

cout<<"\n==============main (Public can b access)=============";

cout<<"\n c="<<d1.c;

getch();

}