What are the best practices for using const pointers in C++?

What are the best practices for using const pointers in C++?

Using const pointers in C++ helps ensure that the data being pointed to cannot be modified. Best practices include: 1. Use const with pointers to indicate that the data should not be changed. 2. Prefer const T* over T* const for better readability. 3. Use const pointers in function parameters to prevent accidental modifications.

Can you give an example of a const pointer?

Sure! Here's an example:

int value = 10;
const int* ptr = &value;
// ptr points to value, but cannot modify it.

What happens if I try to modify the value through the const pointer?

If you try to modify the value through a const pointer, you'll get a compilation error. The const qualifier prevents any changes to the data being pointed to.

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

Yes, avoid using const pointers when you need to modify the data being pointed to. In such cases, use regular pointers instead.