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.

Overriding

• 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.

AmitDiwan

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

• Related Questions & Answers
• Function Overloading and Overriding in PHP
• What is the difference between method overloading and method overriding in Java?
• What is the difference between function overriding and method hiding in C#?
• Difference between Method Overriding and Method Hiding in C#
• What is the difference between overriding and hiding in C#?
• What is the difference between overriding and shadowing in C#?
• What is overriding and overloading under polymorphism in java?
• Function overloading and return type in C++
• Function overloading and const keyword in C++
• Difference between Method and Function in C#
• Method overloading v/s method overriding in Java
• What is the difference between method hiding and method overriding in Java?
• Difference between Function and Procedure
• What is the difference between method overloading and method hiding in Java?
• Difference between a virtual function and a pure virtual function in C++