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What is Multilevel Inheritance in C++
Multilevel Inheritance in C++
As we know that Inheritance is the process where a class is Extending the properties from another class but it is interesting to know that we can inherit a class that is already inherited which is known as Multilevel Inheritance
Definition: It is a process where an inherited class is further made as a parent class to another class
Syntax to Implement Multilevel Inheritance:
class A
{
//contains Only A class properties
...;
};
class B: public A//child of A//intermediate base class
{
....;
//contains both A, B class properties
};
class C: public B//child of B
{
//contains both A,B ,C class properties
-----;
};
- The class that is acquiring the behaviors is called child class or derived class or subclass
- The class from which behaviors are taken is called parent class or superclass or base class
Here B class contains both the properties of A and B whereas C class contains the properties of B and also inherited properties of B i.e A class and also properties of C class
Example Program to demonstrate Multilevel Inheritance
class grandparent//level 1 parent
{
public:
void gp_property()
{
cout<<"\nproperty earned by grand father-Kandhi Buchayya";
}
};
class parent:public grandparent//inheriting grandparent to parent:level 2
{
public:
void p_property()
{
cout<<"\nproperty earned by parent-Kandhi Vijay";
}
//now it conatins 2 methods
};
class child:public parent//level 3 child(powerful fellow)
{
public:
void c_property()
{
cout<<"\n property earned by child itself-Kandhi Trishaank";
}
//It contains 3 methods now
//enjoys properties of parent+grandparent+its own
};
main()
{
child c;//containss the properties of 2 classes
c.gp_property();//derived from grand parent
c.p_property();//derived from parent
c.c_property();//its own method
parent p;
p.gp_property();//derived from grand the parent
p.p_property();//its own method
}
O/P
property earned by grandfather-kandhi Buchayya
property earned by parent-kandhi Vijay
property earned by child itself-Kandhi Trishaank
property earned by parent-kandhi Vijay
property earned by grand parent-kandhi Buchayya
In this example, class parent contains the capabilities of both parent and grandparent whereas a child has capabilities of both parent and grandparent, the child also
- Hence child class enjoys 3 methods gp_property(),p_property() and c_property()whereas parent class enjoys 2 methods gp_property() and p_property()
- Hence class at the lowest level has more capabilities than remaining parent classes
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