What is the use of pointers ? Language c++

Question

Pointers benefits

Answer 1

To hold the address of variables/objects. This is mostly useful in C where function arguments are passed by value and you want to change a variable which may also be a data structure from within the function. In C++, arguments can also be passed by reference without the need for pointers in this case.

Answer 2

What do you mean by changing a variable ? Does this mean that pointers are used to change variables in different ways

Answer 3

Martin Taylor please can you give a brief code example from this explination.

Answer 4

C++ ?