Re: STRING length

Thanks Georg, that looks to be exactly what I need. I do have a problem
'#including', or, 'withing' rather unbounded string.
Now the head of my source file looks like:

with Ada.Text_IO, Ada.Integer_Text_IO, Ada.Strings.Unbounded;
use Ada.Text_IO, Ada.Integer_Text_IO;

which is alright but as soon as I try:

use Ada.Strings.Unbounded;

the compiler gives me a bunch of errors, it seems to conflict with
Text_IO / Integer_Text_IO? Seems like all my previous calls to Put()
now became invalid. I'm not familiar with Ada but with C++ and
understand namespace collisions, is the same thing going on here?

Thanks


On Nov 14, 5:24 pm, Georg Bauhaus <bauh...@xxxxxxxxxxxxx> wrote:
On Tue, 2006-11-14 at 14:51 -0800, markww wrote:
Hi,

How does one use a variable length string in ada?You use variable length strings in Ada by declaring them
to be of type UNBOUNDED_STRING which is defined in
Ada.Strings.Unbounded.

type MY_RECORD is
record
Name: UNBOUNDED_STRING;
Phone: UNBOUNDED_STRING;
Address: UNBOUNDED_STRING;
end record;

Given that Phone is likely to be limited in length, you
could consider declaring the Phone component to be of
type BOUNDED_STRING, which is a string type with a maximum length.
Unlike STRING, objects of this type can have any number
of characters up to the maximum. See Ada.Strings.Bounded.

Yet another use of strings is in nested scopes: If you need
a string in just one place, e.g. temporarily, you can use
a plain STRING as in

declare
temp: constant STRING := some_string_returning_func(...);
begin
-- use temp
end;

The point here is that the `temp` string variable takes
its bound from the initialization. You can also make it a
variable, if you need to write to string components.

Seehttp://en.wikibooks.org/wiki/Ada_Programming/Strings

-- Georg

.

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