How to write a function to rotate an array?

Question

C++ / C#

Implement a function with an array of type int that rotates the array a given number of positions to the left. If a negative shift is given, the function throws an exception.
What parameters to pass to the function if I read the array itself and the shift number from the main function?

Answer 1

Array address, array size, shift

Answer 2

Implement a function of type int,

Does this mean the function should return an int? If yes, then why?
So pass these parameters.
You can also do it the way std::rotate is implemented. But it's a little more difficult for beginners.

Answer 3

An in-place array rotation algorithm is described in John Bentley's Programming Gem 2nd Edition, Addison-Wesley, Peter, 2002, Chapter 2, Section 2.3.
Here is an implementation example. In the same place I saw a more decent implementation of the same algorithm (in terms of code design), but I can’t find it right away.
The shift algorithm is not "in place" (with memory allocation for the result array) is simple, it is implemented by two memory copy operations.