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Date: Sat, 15 Jun 2013 23:54:29 -0700 (PDT)
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Subject: Beginner issue..
From: Marcus F <trenatos@gmail.com>
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Xref: number.nntp.dca.giganews.com comp.lang.ada:181859
Date: 2013-06-15T23:54:29-07:00
List-Id: <comp.lang.ada>

Hi!

I'm Marcus, I'm completely new to ADA but not to programming.
I'm looking at a simple tutorial guide to pick up some basics of ADA, but I ran into an issue that I don't understand.

Here's the trivial example I followed:

with Ada.Text_IO, Ada.Integer_Text_IO;
use Ada.Text_IO, Ada.Integer_Text_IO;
 
procedure Compute is

 procedure Double(Item : in out Integer) is
 begin -- procedure Double.
   Item := Item * 2;
 end Double;

 X : Integer := 1;   -- Local variable X of type Integer.

begin -- procedure Compute
 loop
  Put(X);
  New_Line;
  Double(X);
 end loop;
end Compute;


Now, I expect X to double once per loop, but when I build and run, I just get 0's scrolling down my screen.

Could someone help out a newbie?