What is Multilevel Inheritance in C++
Multilevel Inheritance in C++
On this page we will discuss about 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.
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
#include <iostream>
using namespace std;
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
};
int 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
}
Output
property earned by grand father-Kandhi Buchayya property earned by parent-Kandhi Vijay property earned by child itself-Kandhi Trishaank property earned by grand father-Kandhi Buchayya property earned by parent-Kandhi Vijay
In this example, class parent contains the capabilities of both parent and grandparent whereas a child has capabilities of both parent and grandparent.
- 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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