What is the usage of const pointers in C++?

What is the usage of const pointers in C++?

In C++, a const pointer is a pointer that cannot be changed to point to a different address after it has been initialized. It ensures that the pointer itself remains constant.

Can you give me an example of a const pointer?

Sure! Here's an example:

int value = 10;
int* const ptr = &value; // ptr is a const pointer to an int

What happens if I try to change the pointer?

If you try to change the pointer, like this:

int anotherValue = 20;
ptr = &anotherValue; // This will cause a compilation error

You'll get a compilation error because ptr is a const pointer.

Are there any benefits to using const pointers?

Yes, using const pointers can help prevent accidental changes to the pointer's address, making your code safer and easier to maintain.