Inheritance in C++ Language(part 1)

-

Inheritance in C++ Language


First of all, why do we need inheritance:

We remember some of our earlier concept i.e

Class is used to describe properties and behaviour of an object.

Property's names and values

Behaviour means actions

Lets us assume that we want to represent a car.



As we are looking at quotation above,We Created a Car's Class in which we have made some properties i.e variable and have some methods i.e function to access the property or variable through 
object.

Now you can create different objects for different car, but in all, variables(property) and function (methods) in every object will same.

 What will we do when we have to represent a sports car?


Because the sports car is quite different from a normal car and the properties(variable) and methods
(functions) are also more like given below:



What can we do if we want to represent the sports car?


Lets see, How We Can represent the sport Car :



1-If you are thinking that you add all the functions in the car which is xtra in Sport Car. But by doing      this, we will not be able to access the properties and functions of the  car again. therefore it will          not  work.

2- If you are thinking that you  will create another class and make all properties and functions of a          Sport Car But you have to work hard again, your time and money will be double and oops also say      that you can reuse your work instead of work again. Therefore it will also not work.

3- If you are thinking that you will create another class and make only those properties and functions
     which is xtra in sport car.But by doing this, you will need both classes variables and function in a
    single object but this is against the rule of Encapsulation because according to the Encapsulation
    It's a process of combining data members and functions in single unit (object of class) called class.
    therefore it will also not work

Now, we can solve the above problem by using inheritance and that's why need inheritance in classes.

what is Inheritance ?


It is a process of inheriting properties and behaviours of existing class into a new class.

Existing class=old=Parent class=Base class

New class=Child class=Derived class

Syntax of Inheritance


inheritance definition
syntax of inheritance

Sample Example of Inheritance

inheritance definition
Example of inheritance



If this article is helpful to you then please like share .. thank you....




Comments

Post a Comment

Popular posts from this blog

Notepad, Wordpad and Paint

-
Image
COMPUTER  BASIC COURSE  (From Beginner to Advance Level) Notepad, Wordpad and Ms paint Notepad The Notepad is also one of the products in accessories group of Window operating system. It can be used for writing notes and its also used by programmer to write HTML, JavaScript etc codes. It is useful to for editing and storing all text data. Extension name of Notepad is '.txt' (text) Screen of Notepad Menu Bar Option File Bar                     New   (open new file)                          Open   (open existing file) Save    (save new file) Save As  ( save old file with new name or new place) Print Page   (print your page) Exit (close your current file) Edit Bar Undo (ctrl + z means this command allow you to go back to previous action of file) Cut   ( move you...
Read more

O LEVEL- INTERNET TECHNOLOGY & WEB DESIGN

-
Image
O LEVEL-PAPER 2nd -- M2-R4 : INTERNET TECHNOLOGY & WEB DESIGN THESE ARE THE QUESTIONS WHICH FREQUENTLY ASKED IN    LAST 10 YEARS ----- Definition of SMTP SMTP (Simple Mail Transfer Protocol)  is a  Message Transfer Agent  (MTA). There are two MTAs  client  MTA and  server  MTA. A  client  MTA at clients system sends mail which is received by the  server  MTA at client’s mail server. Further, the client mail server has  client  MTA which sends the mail from client’s mail server to the  server  MTA at recipient’s mail server.  SMTP is a protocol that defines both client-server MTA, on the internet. SMTP protocol is used in the scenario where both the  sender  and  receiver  of mail must be connected to their mail server by  WAN or LAN . SMTP protocol is used two times,  first  between  sender and its mail server  a...
Read more

O LEVEL- INTERNET TECHNOLOGY & WEB DESIGN

-
O LEVEL-PAPER 2nd -- M2-R4 : INTERNET TECHNOLOGY & WEB DESIGN THESE ARE THE QUESTIONS WHICH FREQUENTLY ASKED IN    LAST 10 YEARS ----- MIME Multipurpose Internet Mail Extensions (MIME) is an Internet standard that helps extend the limited capabilities of email by allowing insertion of images, sounds and text in a message. It was proposed by Bell Communications in 1991, and the specification was originally defined in June 1992 for RFCs 1341 and 1342. MIME was designed to extend the format of email to support non-ASCII characters, attachments other than text format, and message bodies which contain multiple parts. MIME describes the message content type and the type of encoding used with the help of headers. All manually composed and automated emails are transmitted through SMTP in MIME format. The association of Internet email with SMTP and MIME standards is such that the emails are sometimes referred to as SMTP/MIME email. The MIME standard def...
Read more