BCA / B.Tech 10 min read

Function Overloading in C++

Function Overloading in C++:


Function overloading is a feature of C++ that allows defining more than one function with the same name, but with different numbers or types of parameters. It is an example of the principle of Polymorphism in object-oriented programming and is also called compile-time polymorphism.

What is Function Overloading?
Function overloading occurs when more than one function is defined with the same name, but their parameters are different in number or type. The compiler decides which function to call based on the type and number of arguments at that time.

Features of Function Overloading:
Same name, different parameters; selection at compile-time; the return type difference does not matter; leads to clean and understandable code.

Advantages of Function Overloading:
Code simplicity, reusability, organized code, and user-friendliness.

Limitations of Function Overloading:
Possibility of ambiguity, compiler dependency, and overloading cannot be based on the return type alone.

Types of Function Overloading:
Based on the number of parameters, type of parameters, or order of parameters.

Function Overloading vs Function Overriding:
A table is provided that compares the two, highlighting differences in scope, function signature, inheritance, and polymorphism type.