Chapter : Inheritance, Semester, Engineering - Computer Science Engineering (CSE) PDF Download

Inheritance

The Slide Covers :

What is Inheritance

Types Of  Inheritance

Public, Private, Protected

What is Inheritance

The mechanism of deriving a new class from an old one is called inheritance or derivation.

Definition of Inheritance:
Inheritance is the mechanism which allows a class A to inherit properties of a class B.

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Types of Inheritance:

Single inheritance

Multiple inheritance
 

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Hierachical Inheritance:

Multilevel Inheritance:

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Hybrid Inheritance:

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Advantages of Inheritance:

The major advantage is the reusability. Once a base class is written and debugged,it need not be touched again,but can be used to work in different.
It also reduces the frustration in complex programming.
Reusing exiting code saves time.

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Disadvantages of Inheritance:

The larger the inheritance model gets, the “wider” the mapped table table gets, in that for every field in the entire inheritance hiearchy, a column must exit in the mapped table.

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Private, Public, Protected :

Public:
Exp: class A
{
Public:
Int x;
Private:
Int y;
};
Class B : public A
{
Private:
Int p;
}

Inheritance----------------------------------------- Next Slide------------------------------- Hardeep Singh

Private, Public, Protected :

Inheritance----------------------------------------- Next Slide------------------------------- Hardeep Singh

Private Inheritance :

Exp:class a
{
Private:
Int x;
Public:
Int y; };
Class B : private A
{
Int p; };

Inheritance----------------------------------------- Next Slide------------------------------- Hardeep Singh

Protected :

Exp:
Class A : protected B
{
Private : int X;
};

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Abstract class

An abstract class is one that is not used to create objects.an abstract class is used only for base class.