Naive question

Naive question

[Maxim Senin]

How to assign value to integer like in C: int i = 'm';?

I tried
    i : Integer := Integer'Value ("m");
but it throws CONSTRAINT_ERROR.

Thanks

Re: Naive question

[John Herro]

Maxim Senin <maks@tech.swh.lv> points out that
     i : Integer := Integer'Value ("m");
raises Constraint_Error.

Right.  Instead, use

     I : Integer := Character'Pos('m');

Note the single tic marks around the m.  Since 'm' is of type Character,
Character'Pos converts from Character to an integer type.  To go the other way,
Character'Val(109) converts from an integer type to Character.  The attribute
'Value converts from type *String*, and 'Image converts *to* String.  Thus
Integer'Value("123") is 123, and Integer'Image(123) is " 123".  HTH.

- John Herro
You can download a shareware Ada Tutor program at
http://members.aol.com/AdaTutor

Re: Naive question

[Steve Doiel]

Use:

  i : Integer := Character'Pos( 'M' );

to get the ordinal value of a character.

  i : Integer := Integer'Value ("12");

Assignes the value of 12 to i.

SteveD

Maxim Senin wrote in message <35DF1997.3CB29CD6@tech.swh.lv>...
>How to assign value to integer like in C: int i = 'm';?
>
>I tried
>    i : Integer := Integer'Value ("m");
>but it throws CONSTRAINT_ERROR.
>
>Thanks
>

Re: Naive question

[Tom Moran]

>How to assign value to integer like in C: int i = 'm';?
Do you mean
 i : integer := Character'Pos('m');
 Or is there some other thing you might mean by the integer value of a
letter of the alphabet?