2. Need for Inheritance Capability of inheriting features. Transitive relationship. Reusablity of class.

3. Presented By Lakshmi Kumari K.V. Shaktinagar

4. Content Introduction Different forms of inheritance Visibility mode Accessibility of base class member Assignment

5. INHERITANCE The mechanism of deriving a new class from an old one is called Inheritance.deriving

6. Raj Father RaniRoshan Base Class Derived Class Existing class is called Base Class. New class is called derived class.

7. INHERITANCE SINGLE INHERITANCE MULTIPLE INHERITANCE MULTILEVEL INHERITANCE HIERARCHICAL INHERITANCE HYBRID INHERITANCE

8. When a subclass inherit only from one base class,it is known as single inheritance. Super Class Derived Class Super Class (Base Class) Sub Class (Derived Class)

9. Syntax: Class Derived-class : Mode base-class { St1; St2; }; Colon gives that derived class-name is derived from base-class. Mode is either private or public.By default mode is private

10. Base Class & Derived Class The new class is called Derived Class and old one is called Base class. Class Student { Public: int Roll; }; Class Ipstudent : public Student { Private : int ipmarks; Public : void info( ) { cout<< Roll; cout<<ipmarks; } }; Main( ) { ipstudent ip; ip.Roll=1; Ip.info( ); }

11. When many subclasses inherit from a single base class,it is known as hierarchical inheritance.

12. Syntax: Class Derived-class : Mode base-class1,Mode base-class2 { St1; St2; }; Mode is either private or public.By default mode is private Name of different base class

13. Super Class Sub Class 2 Sub Class 1 When a subclass inherits from a class that itself inherits from another class it is known as multilevel inheritance.Slide 6Slide 6

14. When one subclass inheriting from many base class,it is known as hierarchical inheritance.Syntax:Syntax:

15. When a subclass inherits from multiple base classes and all of its base classes inherit from a single base class,this form of inheritance is known as hybrid inheritance..

16. Visibility Mode Private When base class is privately accessed by derived class then Public member Private Protected member Private Private member Not inherited Base ClassDerived Class become

17. Visibility Mode Public When base class is publicly accessed by derived class then Private member Not inherited Public member Public Protected member Protected Base ClassDerived Class

18. Visibility Mode Protected When base class is accessed protectly by derived class then Private member Not inherited Public member Protected Protected member Protected Base ClassDerived Class

19. The significance of visibility modes Private :-When the derived class require to use some attributes of the base class and these inherited features are intended not to be inherited further. Public :-When the situation wants the derived class to have all the attributes of the base class,plus some extra attributes. Protected:- When the features are required to be hidden from the outside world and at same time required to be inheritable.

20. Accessibility of base class member Access SpecifierAccessible from own class Accessible from derived class(inheritable) Accessible from object outside class PublicYes ProtectedYes No PrivateYesNo

21. Assignment What is inheritance? How many type of inheritance? When should one derive a class publicly or privately?

22. class PUBLISHER { char Pub[12]; double Turnover; protected: void Register(); public: PUBLISHER(); void Enter(); void Display(); }; class BRANCH { char CITY[20]; protected: float Employees; public: BRANCH(); void Haveit(); void Giveit(); }; class AUTHOR:private BRANCH,public PUBLISHER { int Acode; char Aname[20]; float Amount; public: AUTHOR(); void Start(); void Show(); }; 1.Write the names of data members, which are accessible from objects belonging to class AUTHOR. 2.Write the names of all the member functions which are accessible from objects belonging to class BRANCH. 3. Write the names of all the members which are accessible from member functions of class AUTHOR. 4 How many bytes will be required by an object belonging to class AUTHOR?

23. May you all prosper and be happy! With a lot of love and respect Thank You all