How do I implement operator overloading in C++?

How do I implement operator overloading in C++?

To implement operator overloading in C++, you need to define a function that specifies the behavior of the operator for your class.

Can you give me an example of overloading the '+' operator?

Sure! Here's a simple example:

class Complex {
public:
    float real, imag;
    Complex operator+(const Complex &other) {
        Complex temp;
        temp.real = real + other.real;
        temp.imag = imag + other.imag;
        return temp;
    }
};

This allows you to add two Complex objects using the '+' operator.

What about overloading the '<<' operator for output?

You can overload the '<<' operator by defining a friend function:

#include <iostream>
class Complex {
public:
    float real, imag;
    friend std::ostream& operator<<(std::ostream &out, const Complex &c) {
        out << c.real << " + " << c.imag << "i";
        return out;
    }
};

This allows you to print Complex objects directly.

Are there any limitations to operator overloading?

Yes, there are some limitations. For example, you cannot change the precedence of operators or overload certain operators like ::, . and ?:.