What is a const pointer in C++?

What is a const pointer in C++?

A const pointer in C++ is a pointer that cannot be changed to point to another address after it has been initialized.

Can you give me an example of how to use a const pointer?

Sure! Here's an example:

int value = 10;
int* const ptr = &value; // ptr is a const pointer to value
*ptr = 20; // This is allowed, changing the value of 'value'
// ptr = &anotherValue; // This would cause an error, as ptr cannot point to another address.

What happens if I try to change the pointer itself?

If you try to change the pointer itself, you'll get a compilation error because const pointers cannot be reassigned.

Are there any other types of pointers I should know about?

Yes, there are also pointers like 'const int*' which point to a constant value, and 'int* const' which is a constant pointer to a non-constant value.