creating own Image function

["R" <ruthless@poczta.onet.pl>]

Hello.

I've written my own Image function it's sth like Java's toString.

function Image(this: rec1) return String is
tmp : String(1..26);
begin
tmp := "The value of field is:" & Integer'Image(Get(this));
return tmp;
end Image;

when I use it:

testclass.Create(object, 100); -- note 100 is 3 digits = 3 Characters
Put(testclass.Image(object));

then I can see "The value of field is: 100"
when I initiate my object with 10 - 2 digits = 2 Characters
an exception is raised:
CONSTRAINT_ERROR : testclass.adb:34 length check failed

it's because tmp: Sting has it's fixed length can it be more flexible?

When I tried with String(1..100) the same effect
users can initate their objects with 1, 11, 111, 111111 and so on.

so my question is: can I write(with Your help of course) a function
flexible
to handle all those situations?

thanks in advnce
best regards R