Three Access Specifiers :-
Public :-
• Any member declared under this specifier is Accessible from Outside the class, by using
the object of the Class.
• The Public members of a Class get Inherited completely to the Child Classes.
• The keyword “ public : “ is used.
• Syntax :-
Class definition
{ public :
declarations or definitions
} ;
• Example :-
class A
{ public :
int a;
} ;
main()
{ A oba ;
oba . a = 10 ; // we have set the value of variable ‘ a ‘ in object ‘ oba ‘ to 10
}
Private :-
• Any member declared under this specifier is Not Accessible from Outside the Class.• The Private members are accessible to only the Member Functions and Friend Functions
in the Class.
• The Private members of a Class Never get Inherited to the Child Classes.
• The keyword “ private : “ is used.
• Syntax :-
Class definition
{ private :
declarations or definitions
} ;
• Example :-
class A
{ private :
int a;
public :
void fill ( )
{ cin >> a ;
}
} ;
main()
{
A oba ;
// oba . a = 10 ; // invalid as ‘ a ‘ is private member.
oba . fill ( ) ; // valid as fill ( ) is a public member.
}
Protected :-
• Any member declared under this specifier is Not Accessible from Outside the class, by using the object of the Class.
• The Protected members of a Class get Inherited completely to the Child Classes and they maintain their Protected visibility in the child Class.
• The Protected members are accessible to only the Member Functions and Friend Functions in the Class.
• The keyword “ protected : “ is used.
• Syntax :-
Class definition
{ protected :
declarations or definitions
} ;
• Example :-
class A
{ protected :
int a;
public :
void fill ( )
{ cin >> a ;
}
} ;
main()
{ A oba ;
// oba . a = 10 ; // invalid as ‘ a ‘ is protected member.
oba . fill ( ) ; // valid as fill ( ) is a public member.
}