State and describe visibility modes used in inheritance with their effects.

State and describe visibility modes used in inheritance with their effects.
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1 Answer

Answer :

Visibility modes:

private

protected

public

image

Private:

o When a base class is privately inherited by a derived class, „public

members‟ and „protected members‟ of the base class become

„private members‟ of the derived class.

o Therefore, the public and protected members of the base class can

only be accessed by the member functions of derived class but,

cannot be accessed by the objects of the derived class.

Syntax:

class derived: private base

{

//Members of derived class;

};

Public:

o When a base class is publicly inherited by a derived class then „protected members‟ of base class becomes „protected members‟

and ‟public members‟ of the base class become „public members‟

of the derived class.

o Therefore the public members of the base class can be accessed

by both the member functions of derived class as well as the

objects of the derived class.

Syntax:

class derived: public base

{

//Members of derived class;

};

Protected:

o When a base class is protectedly inherited by a derived class,

„public and protected members‟ of the base class become

„protected members‟ of the derived class.

o Therefore the public and protected members of the base class can

be accessed by the member functions of derived class as well as

the member functions of immediate derived class of it but they

cannot be accessed by the objects of derived class

Syntax:

class derived: protected base

{

//Members of derived class;

};

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