What are const pointers and references in C++?

What are const pointers and references in C++?

In C++, a const pointer is a pointer that cannot change the address it points to, while a const reference cannot be modified.

Can you give me an example of a const pointer?

Sure! Here's an example:

int value = 10;
int* const ptr = &value;

In this case, ptr is a const pointer to value.

What about const references?

A const reference is declared like this:

const int& ref = value;

Here, ref cannot be used to modify value.

When should I use const pointers or references?

Use const pointers when you want to ensure the pointer itself cannot change, and const references when you want to prevent modification of the referenced value.