Hi Richard, I was thinking along those lines when I started to write a plan for the program. I think that learning Cobol was easier for me way back there because I think better with lots of words. The important thing, as you say, is that my interest level drives me to complete the job. It doesn't have to be perfect, but I'd love it if I learned good habits early. Thanks. Jim Jim Homme, Usability Services, Phone: 412-544-1810. Skype: jim.homme. NonVisualDevelopment.org: Blind people can drive computers<http://www.nonvisualdevelopment.org/>. Demonstration GUI Programs: You can program GUI's while blind.<http://www.fruitbasketdemos.org/> From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of R Dinger Sent: Wednesday, April 13, 2011 11:57 AM To: programmingblind@xxxxxxxxxxxxx Subject: Re: Now I Know Why I'm Having Trouble With Objects Hi Jim, I for one think your idea of a chess move validator and future PGN file generator is a great idea. Not only are there many potential objects to choose among in your design, but probably more important is that you are interested in this project and have an ultimate use for the software. I think holding your attention is of more importance in this situation than developing the most efficient or effective system. While I agree with Sina's suggestion for an effective solution, I think it may be too abstract for an early OOP learner. As to the potential objects in your problem, you could consider some or all of the following: 1. Board: a collection object of Squares. 2. Square: a square on the Board has attributes of location, color, what Piece is on it and so forth. 3. Piece: base class for all piece types has attributes of color, location and so forth. 4. Specific Pieces (like Pawn): subclass of Piece adds attributes for a specific Piece like how to move, if captured and so forth. 5. Army: a collection class of one opponent like White that knows who is still in play and so forth. 6. controller: a class that controls the flow of the game, not really much of an object more a procedure wrapped in object clothing. I am not an object purist! Parsing the move text will be a big issue in your system. I think it can be done with regular expressions, though. I think another area of complexity is deciding which objects "know" where each Piece is on the Board and being able to query the system about moves and captures. HTH Richard ----- Original Message ----- From: Homme, James<mailto:james.homme@xxxxxxxxxxxx> To: programmingblind@xxxxxxxxxxxxx<mailto:programmingblind@xxxxxxxxxxxxx> Sent: Wednesday, April 13, 2011 4:24 AM Subject: RE: Now I Know Why I'm Having Trouble With Objects Hi Ken, The only thing I want to do is to check to see if the moves are valid moves. I don't care about making the computer win the game. The program is eventually going to be a portable game notation file reader and writer when I get up to i/o. Right now, I'm just finishing up about arrays, so I was thinking about starting out simply. My first program would be one that asks for a move from the keyboard. Someone would type in something like e4 or Nf3, and the program would check to see things like can that piece move there, is it your turn, did you get the syntax of the move wrong, can you move there because one of your own pieces is on that square. It's just a way to have a project that I'm interested in. I could do Monopoly or something, too, if it works better. I just want to learn this stuff and be happy. Thanks. Jim Jim Homme, Usability Services, Phone: 412-544-1810. Skype: jim.homme. NonVisualDevelopment.org: Blind people can drive computers<http://www.nonvisualdevelopment.org/>. Demonstration GUI Programs: You can program GUI's while blind.<http://www.fruitbasketdemos.org/> From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Ken Perry Sent: Tuesday, April 12, 2011 10:57 PM To: programmingblind@xxxxxxxxxxxxx Subject: RE: Now I Know Why I'm Having Trouble With Objects Jim, I want to make a small suggestion. Your starting out with a very difficult problem to use OOPO to solve. The truth is there are a lot of ways you can do this for a chess game and none of them are really that good. The problem is chess is really just search tree and a state machine and making objects out of nouns and methods out of actions will not make the best of the chess games. If you're looking to learn OOP I would suggest a game like Monopoly or Life where you can actually have Objects work as they should for example you could have players on Monopoly, locations that have descriptions, prices, and things of the sort. Maybe start with a card game where you can have objects that deal with decks of cards and players and score cards and things of the sort. It's really up to you but Chess gets too complicated to fast and then you're not really thinking OOP your trying to decide the best method of figuring out who is winning which is a tougher problem then you might think. Ken From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Homme, James Sent: Tuesday, April 12, 2011 3:27 PM To: programmingblind@xxxxxxxxxxxxx Subject: RE: Now I Know Why I'm Having Trouble With Objects Hi, If it's OK, I'd like to take this a little further. I was thinking about my little chess move validation project. I thought I would sit down and try to write out a little plan, because my book says that the nouns become objects, but I started to get confused when I asked myself this question. Do the pieces move, do the squares on the board somehow get pieces, or does some controller in the sky move the pieces? In the real world, the controller would be the player who is moving the pieces. The pieces can't move them selves, and all the board can do is sit there and have pieces on its squares. The rules would be another object, would they not? Oh my head. Jim Jim Homme, Usability Services, Phone: 412-544-1810. Skype: jim.homme. NonVisualDevelopment.org: Blind people can drive computers<http://www.nonvisualdevelopment.org/>. Demonstration GUI Programs: You can program GUI's while blind.<http://www.fruitbasketdemos.org/> From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Homme, James Sent: Tuesday, April 12, 2011 3:20 PM To: programmingblind@xxxxxxxxxxxxx Subject: Now I Know Why I'm Having Trouble With Objects Hi, I found this humorous. Understanding the Parts of VBA "Speech" If you were going to play soccer using BASIC, the instruction to kick a ball would look something like "Kick the Ball" Hey-this is how we talk! It makes sense. You have a verb (kick) and then a noun (the ball). In the BASIC code in the preceding section, you have a verb (print) and a noun (an asterisk). Life is good. Here is the problem. VBA doesn't work like this. No object-oriented language works like this. In an object-oriented language, the objects (the nouns) are most important (hence, the name: object oriented). If you are going to play soccer with VBA, the basic structure would be: Ball.Kick You have a noun-the ball. It comes first. In VBA, this is an object . Then you have the verb-to kick. It comes next. In VBA, this is a method. The basic structure of VBA is a bunch of lines of code where you have Object.Method Sorry, this is not English. If you took a romance language in high school, you will remember that they used a "noun adjective" construct, but I don't know anyone who speaks in "noun verb" when telling someone to do something. Do you talk like this? Water.Drink Food.Eat Girl.Kiss Of course not. That is why VBA is so confusing to someone who previously stepped foot in a procedural programming class. Let's carry the analogy on a bit. Imagine you walk onto a grassy field and there are five balls in front of you. There is a soccer ball, a basketball, a baseball, a bowling ball, and a tennis ball. You want to instruct the kid on your soccer team to Kick the soccer ball If you tell him kick the ball (or ball.kick ), you really aren't sure which one he will kick. Maybe he will kick the one closest to him. This could be a real problem if he is standing in front of the bowling ball. Jim Jim Homme, Usability Services, Phone: 412-544-1810. Skype: jim.homme. NonVisualDevelopment.org: Blind people can drive computers<http://www.nonvisualdevelopment.org/>. Demonstration GUI Programs: You can program GUI's while blind.<http://www.fruitbasketdemos.org/> ________________________________ This e-mail and any attachments to it are confidential and are intended solely for use of the individual or entity to whom they are addressed. If you have received this e-mail in error, please notify the sender immediately and then delete it. If you are not the intended recipient, you must not keep, use, disclose, copy or distribute this e-mail without the author's prior permission. The views expressed in this e-mail message do not necessarily represent the views of Highmark Inc., its subsidiaries, or affiliates.