Whe we use pointer in c++

Question

I need answar please

Answer 1

pointers are used when we want to change specific memory means we have a variable a in main we will pass its location to another function using pointer and then make changes at location then we come back to main and we see that the value to A changes .

Answer 2

this why we use pointers or global variables

Answer 3

pointers are also used for ethical hacking purposes......