What are some examples of using const references in C++ classes?

Can you explain what const references are in C++ classes?

Sure! In C++, a const reference is a reference that cannot be used to modify the object it refers to. It's often used to pass large objects to functions without copying them.

Can you give me an example of using const references in a class?

Absolutely! Here's a simple example:

class MyClass {
public:
    void display(const std::string& str) const {
        std::cout << str << std::endl;
    }
};

In this example, display takes a const reference to a string, allowing it to be passed without copying.

What are the benefits of using const references?

Using const references can improve performance by avoiding unnecessary copies, especially for large objects. It also helps in maintaining the integrity of the data by preventing modifications.

Are there any situations where I shouldn't use const references?

Yes, if you need to modify the object or if the object is small (like primitive types), passing by value might be more appropriate.