From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,49ddd117f54c2d X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news3.google.com!newshub.sdsu.edu!elnk-nf2-pas!newsfeed.earthlink.net!stamper.news.pas.earthlink.net!newsread2.news.pas.earthlink.net.POSTED!a6202946!not-for-mail From: "Jeffrey R. Carter" Organization: jrcarter at acm dot org User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: New to Ada, noticing something strange. References: <1128014442.343461.185800@g49g2000cwa.googlegroups.com> <_xW_e.4596$zQ3.2632@newsread1.news.pas.earthlink.net> <1128020747.226853.325750@z14g2000cwz.googlegroups.com> In-Reply-To: <1128020747.226853.325750@z14g2000cwz.googlegroups.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Message-ID: Date: Fri, 30 Sep 2005 06:23:21 GMT NNTP-Posting-Host: 67.3.213.152 X-Complaints-To: abuse@earthlink.net X-Trace: newsread2.news.pas.earthlink.net 1128061401 67.3.213.152 (Thu, 29 Sep 2005 23:23:21 PDT) NNTP-Posting-Date: Thu, 29 Sep 2005 23:23:21 PDT Xref: g2news1.google.com comp.lang.ada:5298 Date: 2005-09-30T06:23:21+00:00 List-Id: mike.martelli@gmail.com wrote: > As for indexing the > string by 1, assume it is always of length 1 (i have a function that > make sure of it) - i know i can use a chracter but I left it like this > for now. Note that a length of 1 and and index of 1 are 2 different things: A : String (3 .. 3); A'Length = 1, A'First = A'Last = 3; 1 is an invalid index for A B : String (1 .. 9); Put_Line (Item => B (4 .. 4) ); Passing a slice of length 1. Item'Length = 1, Item'First = Item'Last = 4; 1 is an invalid index. > function AddDigits(charOp1, charOp2: Character) return Character is > begin > charDigit := Convert2Character(Integer'Image(charMap(charOp1) + > charMap(charOp2) + carry)); If you call this with Charop1 => '9' and Charop2 => '9', your sum is 18. Integer'Image of that is " 18" (note the leading space), which is not of length 1 (its lower index is 1, though). Convert2character should return ' '. I suspect you have a logic error here. > I am using the GNAT compilier, I do not know what version. It is on my > schools server (NYU). I see. When asking for help with homework, it's a good idea to make it clear that that's what you're doing. "gnatmake -v" should print the version; it also helps to know what platform you're running on. If you determine this is a compiler error, then you should probably report it to whoever administers the compiler on your system. -- Jeff Carter "There's no messiah here. There's a mess all right, but no messiah." Monty Python's Life of Brian 84