⭐ What is a Binary Operator?

A binary operator is an operator that works on two operands.

Example:

a + b
x - y
p * q

Here +, -, *, /, %, <, > etc. are binary operators because they need two values.

---

⭐ What is Binary Operator Overloading?

Binary operator overloading means:

Giving a new meaning to a binary operator when it is used with objects of a class.

Example:

c3 = c1 + c2;

Here c1 and c2 are objects.
The compiler doesn't know how to add them.
So we overload the + operator to teach the compiler what to do.

---

⭐ Why do we overload binary operators?

Because operators like +, -, * know how to work on int, float, etc.,
but they don't know how to work on your custom objects.

So you tell the compiler:

"When I use + between two objects of this class, run this function."

---

⭐ Syntax of Binary Operator Overloading

returnType operator+(ClassName obj) {
    // Your logic
}

This function runs when you write:

obj3 = obj1 + obj2;

---

⭐ Easy Real-Life Example (Time Addition)

Let’s add hours and minutes using the + operator.

#include <iostream>
using namespace std;

class Time {
public:
    int hr, min;

    Time(int h = 0, int m = 0) {
        hr = h;
        min = m;
    }

    // binary operator overloading
    Time operator+(Time t) {
        Time temp;
        temp.hr = hr + t.hr;
        temp.min = min + t.min;

        if (temp.min >= 60) {
            temp.hr += temp.min / 60;
            temp.min = temp.min % 60;
        }

        return temp;
    }

    void display() {
        cout << hr << " hours " << min << " minutes" << endl;
    }
};

int main() {
    Time t1(2, 50);
    Time t2(1, 30);

    Time t3 = t1 + t2; // operator+() called

    t3.display();
    return 0;
}

---

⭐ Output

4 hours 20 minutes

---

⭐ Quick Summary (Very Easy)

• Binary operator → works on 2 operands

• Example: +, -, *, /, %, <, >

• Overloading means → giving new meaning for objects

• You write operator+ inside the class

• When you use obj1 + obj2, your overloaded function runs.