{ C++ }

C++ Inheritance

Object Oriented Programming provide a feature of inheritance.Inheritance is a process to create new class which acquires the properties of existing class with some changes.

class new_class_name: public old_class_name
{
statement 1
statement 2
statement 3
}

C++ Inheritance Example

#include   
class School
{  
   public:int id=2; 
};  
   class Student: public School
   {  
   public:int roll_no=1;    
   };       
void main() 
{  
  Student s;  
  cout << "Id: " << s.id << endl;    
  cout << "Roll No: "<< s.roll_no << endl;     
}   

output:
Id: 2
Roll No: 1

Multilevel Inheritance

When one class inherits another class which is again inherited by another class,is known as multilevel inheritance in C++.

#include 
class A
{  
   public:void aa() 
   {   
	cout << "Hello..."<< endl;   
   }    
};  
class B: public A   
{    
   public:void bb()
   {  
    cout <<" How Are You..."<< endl;   
   }    
};   
class C: public B   
{    
	public:void cc() 
	{  
	 cout <<" Where Are You From...";   
	}    
};   
void main() 
{  
  C c;  
  c.aa();  
  c.bb();  
  c.cc();   
}  

output:
Hello...
How Are You...
Where Are You From...