Difference Between Function Overloading and Overriding in C++

In this post, we will understand the difference between function overloading and function overriding in C++.

Overloading

No keyword is used during overloading.
The prototype differs only based on the number or type of parameter.
It happens during compile time.
Constructors can be overloaded.
Destructor can’t be overloaded.
It can be used to achieve early binding.
The version of function being called is determined by the number or type of parameter being used.
The functions would be redefined with the same name, different number or type of parameters.

The prototype remains same throughout.
It occurs at runtime.
Virtual functions can’t be overridden.
Destructor can be overridden.
Overriding is also known as late binding.
The function that would be overridden is preceded by the ‘virtual’ keyword in the base class.
The address of the class’s object is assigned to the pointer whose function is called by the pointer.
When the function is defined, it is preceded by ‘virtual’ keyword in main class.
The same function is redefined in derived class using ‘out’ keyword.

Published on 25-Mar-2021 05:31:44