When should I use const references in C++?

When should I use const references in C++?

You should use const references when you want to pass large objects to functions without copying them, while ensuring they are not modified.

Can you give me an example of using const references?

Sure! Here's a simple example:

void printValue(const std::string& str) {
    std::cout << str << std::endl;
}

In this function, str is a const reference, so it avoids copying the string.

What are the benefits of using const references?

The benefits include improved performance by avoiding unnecessary copies and ensuring that the original object cannot be modified.

Are there any downsides to using const references?

One downside is that you cannot modify the object being referenced, which may not be suitable in all situations.