Re: Data_Error - Where in this code?

[Mark Johnson <mark_h_johnson@raytheon.com>]

Stewart wrote:

> On Mon, 06 Aug 2001 20:47:41 +0100, Stewart <s_aitken@lineone.net>
> wrote:
> Hi,
>
> I still get the Max_Size is not declared, but it is not defined until
> the variable for the input is obtained.

And as such - Max_Size cannot be used in an expression prior to its
initialization. The line...
  >      Input     : String (1 .. Max_Size);
is such an expression. It requires the compiler to allocate "Max_Size" bytes of
storage for the "Input" string. Let's say the Ada runtime gave you a default
value of zero (0) for Max_Size - the statement above be equivalent to...
 >      Input     : String (1 .. 0);
which I'm pretty sure is not what you wanted.... If you have something like gvd
(GNU visual debugger), I suggest stepping through the code to illustrate this
concept.

Why not use...
  Max_Size : Positive := 80; -- make it longer than any expected input line
instead. Text_IO.Get_Line will read up to 80 characters from the input line & set
Max_Size to the number of characters read. The rest of the code is pretty user
hostile, but "should work" as you expect.
  --Mark