What is the difference between const references and pointers in C++?

What is the difference between const references and pointers in C++?

In C++, a const reference allows you to refer to an object without modifying it, while a pointer can be reassigned and can also be null.

Can you give me an example of when to use a const reference?

Sure! Use a const reference when passing large objects to functions to avoid copying, like this: void func(const MyClass &obj) { ... }.

What about pointers? When should I use them?

Pointers are useful when you need dynamic memory allocation or to modify the original object. For example, MyClass *ptr = new MyClass();.

Are there any downsides to using pointers?

Yes, pointers can lead to memory leaks if not managed properly, and they require careful handling to avoid dereferencing null or dangling pointers.