Function Overriding

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When the base class and derived class have member functions with exactly the same name, same return-type, and same arguments list, then it is said to be function overriding.

Function Overriding using C++

The following example shows how function overriding is done in C++, which is an objectoriented programming language −

#include <iostream> 
using namespace std;  

class A {  
   public: 
   void display() {   
      cout<<"Base class"; 
   } 
}; 

class B:public A {  
   public: 
   void display() {   
      cout<<"Derived Class"; 
   } 
}; 

int main() {  
   B obj; 
   obj.display(); 
   return 0;  
}

It will produce the following output

Derived Class 

Function Overriding using Python

The following example shows how to perform function overriding in Python, which is a functional programming language −

class A(object): 
   def disp(self): 
      print "Base Class"  
class B(A): 
   def disp(self): 
      print "Derived Class"  
x = A() 
y = B()  
x.disp() 
y.disp() 

It will produce the following output −

Base Class 
Derived Class