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,FREEMAIL_FROM autolearn=unavailable autolearn_force=no version=3.4.4 X-Received: by 10.224.10.6 with SMTP id n6mr31542017qan.4.1367103403842; Sat, 27 Apr 2013 15:56:43 -0700 (PDT) X-Received: by 10.49.62.135 with SMTP id y7mr4173115qer.26.1367103403819; Sat, 27 Apr 2013 15:56:43 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!mx05.eternal-september.org!feeder.eternal-september.org!news.glorb.com!s14no277186qam.0!news-out.google.com!ef9ni27140qab.0!nntp.google.com!s14no277183qam.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Sat, 27 Apr 2013 15:56:43 -0700 (PDT) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=134.240.94.19; posting-account=CZZpzgoAAAAoaHoNNp9zhY9EzQgEmxhU NNTP-Posting-Host: 134.240.94.19 References: <87c89205-7fee-4d88-b4ab-08d26c03219b@googlegroups.com> <99d9a17c-ed8d-4c28-90d0-6543b511cb87@googlegroups.com> <4c3eca49-8ee6-4518-9968-879c08b828f6@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: Subject: Re: Depth First Search of a Char_Matrix? From: Alex Injection-Date: Sat, 27 Apr 2013 22:56:43 +0000 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Xref: news.eternal-september.org comp.lang.ada:15195 Date: 2013-04-27T15:56:43-07:00 List-Id: On Saturday, April 27, 2013 3:05:30 PM UTC-4, Shark8 wrote: > On Saturday, April 27, 2013 10:51:44 AM UTC-6, Alex wrote: >=20 > >=20 >=20 > > Thanks! So I am given the function signature, not really a function bod= y that looks like this >=20 > >=20 >=20 > > function Count_Alive(Board : Char_Matrix) return Integer is >=20 > > M : Char_Matrix :=3D Board; =20 >=20 > > begin >=20 > > return -999; >=20 > > end Count_Alive; >=20 > >=20 >=20 > >=20 >=20 > > So I understand much of your logic, but I am given a matrix of characte= rs defined as such: >=20 > >=20 >=20 > > type Char_Matrix is array(Positive range <>, Positive range <>) of Char= acter; >=20 > >=20 >=20 > > So could you give me like an algorithm in words on what I need to do in= stead of giving me the answer in code? >=20 >=20 >=20 > The algorithm is much the same, just substitute a "Piece'(Color=3D>Black)= " for 'B', "Piece'(Color=3D>White)" for 'W', and the space/'.'/whatever for= the null. (Your handling of null and such will have to change, but it's th= e same idea as in the code already given: there's a board-position that mig= ht have a piece, if it does that piece is either black or white and either = alive or dead.) I am just still a little confused. I know how to do a DFS if I actually ha= ve a Graph Data Type with nodes and edges but I do not have that. I am giv= en the following type Char_Matrix is array(Positive range <>, Positive range <>) of Characte= r; and function Count_Alive(Board : Char_Matrix) return Integer is begin return -999; end Count_Alive; The Char_Matrix will look something like this: WW.BB .WWWW WWBBB BBBWW WWBW. I have not depicted it in the picture above but a '/' is off the board and = the perimeter of the char_matrix is made up of a bunch of '/', a 'W' is a w= hite piece, a 'B' is a black piece and a '.' is an empty space on the board= . A piece is alive if it is next to an empty space ('.') or if it is next = to an alive piece of the same color. What are the nodes and edges and how d= o you traverse this using DFS to count the number of Alive pieces and numbe= r of Dead pieces?