🟣 OOP · Lesson 50

Operator Overloading

What is Operator Overloading?

Operator Overloading
Operator overloading gives special meaning to operators for user-defined classes. It makes object operations natural and readable.

Level
🟣 Object-Oriented Programming

Example File
operator-overloading.cpp

Main Focus
Concept + syntax + practical C++ program

Why should you learn this?

It helps you write correct and readable C++ programs.
It is used repeatedly in school practicals, projects and competitive programming.
It builds the base for advanced topics such as OOP, STL and data structures.

Important Terms

Term	Meaning / Use
operator function	Operator Overloading programming में Operator function use होता है।
overload	Operator Overloading programming में Overload use होता है।
user-defined type	User-Operator Overloading programming में defined type use होता है।
+ operator	+ Operator Overloading programming में operator use होता है।

Syntax / Pattern

C++

ReturnType operator+(const ClassName &obj) { }

Example Program

main.cpp

#include <iostream>
using namespace std;
class Number{
public:
    int x;
    Number(int v): x(v) {}
    Number operator+(Number n){ return Number(x + n.x); }
};
int main(){ Number a(5), b(7); Number c = a + b; cout << c.x; }

Expected Output

Program Explanation

operator+ adds values inside two Number objects.
a + b becomes a.operator+(b).

Exam Tip: In C++ practical answers, write the logic first, then the program, then expected output. For theory, always include one suitable example.

Where will you use it?

complex numbers
matrix addition
custom classes

Common Mistakes

Overloading operators in confusing ways.
Trying to overload operators that cannot be overloaded.

Practice Tasks

Overload + for Distance class.
Explain why operator overloading improves readability.

Summary

Operator Overloading एक ज़रूरी C++ topic है। परिभाषा सीखें, syntax समझें, example program चलाएं और फिर practice tasks हल करके concept मज़बूत करें।