static void ReverseAnArray(Homework_2 hw2)
{
int length = 10;
int[] arr, reverse;
string arrStr, reverseArrStr;
arr = hw2.FillArray(length);
arrStr = hw2.PrintArray(arr);
reverse = hw2.ReverseArray(arr);
reverseArrStr = hw2.PrintArray(reverse);
Console.WriteLine($"arr {arrStr}");
Console.WriteLine($"reverse {reverseArrStr}");
}