Quick Answer

Define custom behavior for operators.

Understanding the Issue

C++ allows defining custom implementations for most operators when working with user-defined types.

The Problem

This code demonstrates the issue:

Cpp Error 
// Need to add two custom objects

The Solution

Here's the corrected code:

Cpp Fixed 
#include <iostream>

class Vector2D {
public:
    float x, y;
    Vector2D(float x, float y) : x(x), y(y) {}
    
    // Overload + operator
    Vector2D operator+(const Vector2D& other) const {
        return Vector2D(x + other.x, y + other.y);
    }
};

int main() {
    Vector2D v1(1.0f, 2.0f);
    Vector2D v2(3.0f, 4.0f);
    
    Vector2D result = v1 + v2; // Uses overloaded +
    std::cout << "Result: (" << result.x << ", " << result.y << ")" << std::endl;
    
    return 0;
}

Key Takeaways

Operator overloading enables natural syntax for custom types.