Re: Newbie question about types

Re: Newbie question about types

[Matthew Heaney]

In article <81bn5j$sv8$1@nntp9.atl.mindspring.net> , "David Powell" 
<powellboys@mindpring.com> wrote:

> I am a new Ada (notice the spelling.  you guys seem to be pretty touchy
> about it) and am working through a book.  The author makes many references
> to enumeration types and numeric types without distinguishing the two.  Any
> help on what an enumeration type is as apposed to a numeric type would be
> appreciated.

type Enumeration_Type is (A, B, C);

type Integer_Type is range 1 .. 10;

type Modular_Type is mod 256;

type Float_Type is digits 6 range -pi .. pi;

type Fixed_Type is delta 0.01 range 0.0 .. 1.00;


ie

  type Gender_Type is (Male, Female);

  type Height_In_Feet_Type is range 0.0 .. 20.0;




--
The theory of evolution is quite rightly called the greatest unifying
theory in biology.  The diversity of organisms, similarities and
differences between kinds of organisms, patterns of distribution and
behavior, adaptation and interaction, all this was merely a bewildering
chaos of facts until given meaning by the evolutionary theory.

Populations, Species, and Evolution
Ernst Mayr

Re: Newbie question about types

[Larry Kilgallen]

In article <81bn5j$sv8$1@nntp9.atl.mindspring.net>, "David Powell" <powellboys@mindpring.com> writes:
> I am a new Ada (notice the spelling.  you guys seem to be pretty touchy
> about it) and am working through a book.  The author makes many references
> to enumeration types and numeric types without distinguishing the two.  Any
> help on what an enumeration type is as apposed to a numeric type would be
> appreciated.

It sounds like what you need most is a new book (providing the one you
have is an introductory text).  Please share the name of the book you
are now using, so we can steer clear.

Larry Kilgallen

Re: Newbie question about types

[BSCrawford]

David, 

An enumeration type declaration specifies a list of distinct 
items, enclosed in parentheses. The items are identifiers or 
character literals. In either case the legal values of the 
type are referred to as "enumeration literals." Each of these 
values has a "position number" corresponding to its position 
in the list  Enumeration types have attributes  T'First, T'Last, 
T'Range, T'Pred, T'Succ, T'Min, T'Max, T'Image, T'Wide_Image, 
T'Value, T'Wide_Value, T'Pos, and T'Val

Numeric types specify sets of numerical values and include 
integer types, floating-point types, and fixed-point types. 
Generally speaking, numeric types have the same attributes as 
enumeration types. However, floating-point and fixed-point 
types do not have the T'Pos and T'Val attributes. Some numeric 
types have additional attributes. For example, fixed-point types 
have the attributes T'Delta, and T'Small.

(Congratulations on the proper spelling of Ada, and good 
luck with our favorite language. :-)

Bard Crawford
Stage Harbor Software

Newbie question about types

[David Powell]

I am a new Ada (notice the spelling.  you guys seem to be pretty touchy
about it) and am working through a book.  The author makes many references
to enumeration types and numeric types without distinguishing the two.  Any
help on what an enumeration type is as apposed to a numeric type would be
appreciated.

Re: Newbie question about types

[Preben Randhol]

"David Powell" <powellboys@mindpring.com> writes:

| I am a new Ada (notice the spelling.  you guys seem to be pretty touchy
| about it) and am working through a book.  The author makes many references
| to enumeration types and numeric types without distinguishing the two.  Any
| help on what an enumeration type is as apposed to a numeric type would be
| appreciated.

For a small intro:

http://www.adahome.com/Tutorials/Lovelace/s6s1.htm
and
http://www.adahome.com/Tutorials/Lovelace/s6s4.htm

-- 
Preben Randhol                     "Marriage is when you get to keep
[randhol@pvv.org]                   your girl and don't have to give
[http://www.pvv.org/~randhol/]      her back to her parents." (Eric, 6)

Re: Newbie question about types

[Riyaz Mansoor]

heaney,

> type Enumeration_Type is (A, B, C);
>
> type Integer_Type is range 1 .. 10;
>
> type Modular_Type is mod 256;
>
> type Float_Type is digits 6 range -pi .. pi;
>
> type Fixed_Type is delta 0.01 range 0.0 .. 1.00;
>
>   type Gender_Type is (Male, Female);
>
>   type Height_In_Feet_Type is range 0.0 .. 20.0;

hey thanx. i just figured out a mistake i've been making. :)

the moral of the story is : you can never learn everything. heheh