Re: Newbie question on Ada TExt_IO

[tmoran@acm.org]

>expecting a character not a single item String array!  How can I convert
>from one into the other?
  A String is an array of Character so you just subscript to get a
single value.  String(1 .. 2) is a 2 character string, String(1 .. 1)
is a 1 character long string, and String(1) is a single Character.
So replace
>        if Is_Digit(Input(1..1)) then
which is illegal, by
         if Is_Digit(Input(1)) then
or, more simply,
         if Input(1) in '0' .. '9' then

Note that there's a bug in your code: what happens if the user just
hits the Enter key without having typed in any characters for Input?

You might consider dropping the Success flag and instead using an
"exit" statement.

>Does the RM list all the packages provided by Ada or are there more to be
>discovered?
  Particular compiler vendors usually supply extra stuff, and you can find
things at www.adaic.org or www.adapower.com, but yes, the RM lists all
the *official* Ada packages.