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Message-ID: <3C15FB6A.4070805@oek.dk>
Date: Tue, 11 Dec 2001 13:26:18 +0100
From: "Peter I. Hansen" <pih@oek.dk>
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Newsgroups: comp.lang.ada
Subject: Re: Command_Line question
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Date: 2001-12-11T13:26:18+01:00
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Tucker Taft wrote:

>"Peter I. Hansen" wrote:
>
>>Hello
>>
>>I'm new to Ada95, and I'm trying to write a program which needs to read
>>arguments from the command line. I found out that the Command_Line
>>package is the way to go, but something i don't get. for example if I
>>have this code :
>>
>>WITH Ada.Text_IO;
>>WITH Ada.Command_Line;
>>WITH Ada.Integer_Text_IO;
>>
>>PROCEDURE Test IS
>>
>>Num : Natural ;
>>NumLength : Natural ;
>>
>>BEGIN -- Test
>>   Ada.Integer_text_IO.Get( From => Ada.Command_Line.Argument(Number => 1),
>>                            Item => Num,
>>                            Last => NumLenght);
>>
>
>Generally, it is easier to use "Integer'Value(blah)" than "Integer_Text_IO.Get(...)".
>Integer_Text_IO gives you more control, but Integer'Value is usually adequate.
>So you could change this to:
>
>     Num := Integer'Value(Ada.Command_Line.Argument(Number => 1));
>
This is just what I'm looking for. This notation is not in my Ada95 book.

>>   Ada.Integer_Text_IO.Put(Item => Num);
>>
>>END Test;
>>
>>The question is : Is there a way to do this whitout the 'NumLength'
>>variable, or is this just the way things work ?
>>
>>/Peter
>>
>
Thanks

/Peter