Re : Run time sizing of arrays - HELP

Re : Run time sizing of arrays - HELP

[Marcel Hawtin]

I'm new to Ada, and was wondering if it is possible for the size of arrays to be
determined at run time.

For example, many years ago it was possible to say in BASIC something like :

10 INPUT A
20 INPUT B
20 DIM(A,B)

Any help greatly appreciated.

Thanks Marcel



e-mail : hawtinml@aston.ac.uk

Re: Re : Run time sizing of arrays - HELP

[Garlington KE]

Marcel Hawtin (hawtinml@aston.ac.uk) wrote:

: I'm new to Ada, and was wondering if it is possible for the size of arrays to be
: determined at run time.

: For example, many years ago it was possible to say in BASIC something like :

: 10 INPUT A
: 20 INPUT B
: 20 DIM(A,B)

The equivalent in Ada would go something like:

  A, B : Positive;
  ..
  Pos_IO.Get(A);
  Pos_IO.Get(B);

  declare
     type Some_Dynamic_Array_Type is array (1 .. A, 1 .. B) of Some_Object;
     C : Some_Dynamic_Array_Type;
  begin
  ..

  Notice I said "Something" like, since (1) I don't have an Ada compiler on
  this machine and (2) there's several other ways (all better, I'm sure) for
  creating C and (3) it's been a long time since I wrote any BASIC.  

--------------------------------------------------------------------
Ken Garlington                  GarlingtonKE@lfwc.lockheed.com
F-22 Computer Resources         Lockheed Fort Worth Co.

If LFWC or the F-22 program has any opinions, they aren't telling me.