keeping array limits in fortran during subroutine call

Question

I have the following program

module test
contains
   subroutine foo()
      integer, allocatable :: a(:)
      allocate(a(-5:5))
      call bar(a)
      prin         


        

Answer 1

How can I instruct the compiler that, within the bar routine, the numbering of the a array must be the same as in the caller ?

Not sure but according to the standard you can specify the lower bound for an assumed-shape array.

subroutine bar(a)
      integer, intent(out) :: a(-5:)