Re: Command_Line question

["Peter I. Hansen" <pih@oek.dk>]

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