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So I welcome you again to the next session on Happy Learning, and we are going to cover inheritance

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in C++, that's the topic we are covering on this unit.

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So let's jump on to that topic.

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So talking about inheritance, inheritance means the capability of a class to derive the properties

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and characteristics from another class.

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So suppose we have two classes classes a class and Class B OK, and Class B want to get some properties

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from Class A. That is normative so that properties can be their members or even member functions.

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So why we are using an inheritance?

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Inheritance is one of the most important feature in the C++ order in the world of object oriented programming.

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But why we are using inheritance is to enhance that using feature.

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So instead of writing everything from scratch, which is already defined in this program, if we can

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reuse the existing components and create new components from those existing components, that will be

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more equally vital in order to promote that.

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In order to make sure that you can reuse all the components, all the glasses, all the objects, all

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the functions are all that values are data variables.

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In a program, we can use the feature called inheritance that is too important garden type you need

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to know while we are talking about inheritance in C++ learning.

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Superclass OK, and none of this subclass.

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So a subclass is a class that inheritance inherit properties from another class.

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So suppose there is a class card, Class E and Class another class card, Class B and Glass B's.

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Inheriting some properties from Class A, then Class B is called the subclass of class, so top class

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is also called deriving a class, then next class superclass.

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Suppose that is a class which is a reference class for a sub class.

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That means that our subclass is inheriting some functions and variables from other superclass.

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So that class is called superclass.

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So we can see a good example of inheritance all here.

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Bensouda, the case of three makers.

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OK, I have three acres, so I have created three classes for these three vehicles and each class contained

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its own member functions.

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But I know very similar aspect, right?

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It's a class guard.

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Bess and B+ Best will contain function to calculate that amount regard to Philadelphia.

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So that is a full on function capacity function to get how much fuel that particular vehicle can hold,

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and they decided the function.

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We just can't apply brakes, which will specify the amount of effort or effort required to apply the

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brakes.

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So even if it is three different classes, these three vehicles can use these functions right.

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See Class Bess have all these three facilities.

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Similarly, Blast God should also help you out of my own capacity and apply brakes because this is common

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to all the classes and also class.

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Even if it is a trap, it should be able to find the amount of fuel required, capacity required and

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how much I would be required to apply the brakes.

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So all these classes require these three functions.

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So instead of making this class, each class a new function for the same purpose, so the buses are

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safe, right?

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So instead of making three three different functions on each class, we can be sure that we create a

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new class car class maker.

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So that class very good contains all these three functions.

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So here you can see that if you allow more designer capacities that apply brakes is there, and what

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happens is class best car and truck can get this function from glass very good and use it whenever required.

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So instead of writing the same functions three times in each of these class, I have created a separate

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super class which is having all these functions and all subclasses or derived classes.

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Best Scott and Truck gets the functions when nobody forms to use.

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So here you can see an inheritance diagonal class.

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Meg Lees, the superclass and Buska and Track are that subclasses and the adding head hitting see that

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this is getting see that this is getting this function from the Ebo class.

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These three Genzel class buses inheriting B-Class vehicles.

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So this is that diagonal.

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So what I who is that superclass that will be on the top and the subclass will be on the bottom?

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And yeah, auto will be like this subclasses inheriting the superclass.

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So there should be an arrow from superclass to stop fastener drums up class to class, but instead we

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will be putting an arrow from superclass to subclass how that's how you would an inheritance bag.

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So how you can implement inheritance in C++ is our next topic, and there is a specific syntax dedicated

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for implementing inheritance in C++, so.

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Here is the syntax I have given for you, so class during this class, then you have to give this up

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class name.

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Then you have to put this dodge symbol up and down dog, and then you have to put the access mark,

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then base class name.

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So you have three access Marzia, Public Protector and private and you getting heritage superclass in

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three ways that is Public Protector and private each have a different speciality so that we will be

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discussing shortly.

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So after you write this index, we will be writing the body of the class and inside that basis, followed

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by a semicolon.

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So you have if supposing I want to inherit a class guard Class B.