Re: Introductory Ada Programming Book

["J-P. Rosen" <rosen@adalog.fr>]

Le 04/01/2017 à 10:25, raph.amiard@gmail.com a écrit :
> 
>> Nice in its presentation and intent, but unfortunately carries a
>> lot of inexact stuff. Maybe the community could help (politely) the
>> guy...
> 
> I read it some time ago, but I didn't find a lot of inexact stuff.
> Would you mind giving more details ?
> 
Some excerpts:

  exit when (a == 0)

Switch statements must cover all possible input values --- for unbounded
types like integers, a when others is mandatory.

Oddly, variables are not initialised by default
(Personal opinion: default initialization is a huge mistake)

Ada is, alas, a one-pass language, so things need to be prototyped if
you're going to refer to them before they're defined.

Plus you can omit the parentheses when calling zero-argument functions
and procedures;
(You must!)

type Vector is array(integer range<>) of float;
These are a little bit deceptive. They don't represent an array which
can change in size; they represent an array whose size is not known by
the type system. They're implemented via a combination of fat pointers
and fixed-size arrays, depending on context. They can be used as a
shortcut in declaring variables, but they're mostly useful as parameters.

----------
etc...
Often not really wrong, but imprecise or incorrect

-- 
J-P. Rosen
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