how to capture a pointer in CPP

In C++, you can capture a pointer by dereferencing it using the `*` operator. For example, if you have a pointer `int* ptr` that points to an integer, you can capture the value of the integer by dereferencing the pointer like this:

int value = *ptr;

This will assign the value of the integer that `ptr` points to, to the variable `value`. You can then use `value` in your code as needed.

It's worth noting that capturing a pointer in this way can be dangerous if the pointer is not valid (i.e. it points to memory that has been deallocated or is otherwise inaccessible). It's important to make sure that the pointer is valid before dereferencing it.