Re: C programming Arrays
- From: "Jackie McBride" <abletec@xxxxxxxxx>
- To: programmingblind@xxxxxxxxxxxxx
- Date: Tue, 9 Oct 2007 17:55:15 -0700
John, could ya get on skype? This is too long via email.
On 10/9/07, John Miller <n1umj@xxxxxxxxxxx> wrote:
> I understand the concept of what an array does, I'm just not sure how to use
> it. Example, I can get started with them, declaring the variables and all
> with the number in brackets, but after that, no matter how many sites I look
> at, it's like I'm looking at the same things over again and I'm not getting
> it, especially when it comes to adding it in to an already existing program
> assignment. If that makes sense, I need something closer to my assignment
> figuring out employee wages and all and just an empty example, or an example
> when the numbers in the program are already known, instead of like with this
> program when I have to enter them, that's where I get stuck. I can get the
> idea if I see something closer to actual work.
> My main problem is, I went in to this class knowing nothing. I'm getting
> there, but I'm not a programmer. I see all the time where that's obvious in
> what I miss. I'm trying pretty much to get through the class. At this point
> and am with a lot of help. I'm trying to depend less on help and more on
> getting things done but getting enough help to at least pass. If I didn't
> need the class I'd get rid of it, actually, if it wasn't for the fact I had
> to drop a class already that I couldn't take because the program needed for
> everything didn't work with a screen reader, I'd drop it and try again on
> campus where I might be able to work more with people in the class but I'm
> kind of locked in to right now where I have to take and pass it.
> ----- Original Message -----
> From: "Dale Leavens" <dleavens@xxxxxxx>
> To: <programmingblind@xxxxxxxxxxxxx>
> Sent: Tuesday, October 09, 2007 7:02 PM
> Subject: Re: C programming Arrays
>
>
> Hi John,
>
> Arrays come in up to three dimensions. A one dimensional or single
> dimensioned array is like a list or a stack of open ended boxes into which
> values may be stored. A two dimensional array is like a collection of boxes
> or pigeon holes, that is you have rows and columns of boxes into which you
> can stuff values. Three dimensional arrays are like layers of pigeon holes
> stacked in front of each other into which values may be stuffed and
> retrieved. When you want to stick something into a particular array location
> you must specify which one. For example:
>
> Pigeon hole [1 down], [two to the right], [three deep]
> in the case of a three dimensioned array.
>
> In the case of a single dimension array which is more like a list you might
> retrieve the item in list [12].
>
> If you were modeling a checker board it would be a two dimension array,
> CheckerBoard[8],[8].
>
> The various dimensions then are referred to as indexes and may be referred
> to using integer variables so you can use a loop to loop through each index
> of an array to read from the location or write to it or change it or what
> ever. The trick there is to remember which index you are referencing, that
> is, to read in sequence you probably want to set x to one then loop through
> y then increase x and again loop through y until you have visited all of the
> x/y index locations.
>
> Is that the sort of thing you were looking for?
>
> You must specify the sort of variable you are storing, you can have arrays
> of strings, integers, doubles and floats but you cannot mix them. You can
> however have an array of strings say to hold names and a similar array of
> floats to hold wages and index both with the same value so that:
>
> NameString[1] is an employee name and WageFloat[1] is his wage. Different
> arrays but linked by their index. Your programme must take care not to
> confuse the index or you may be pointing to someone else's wages.
>
> Hope I understood your request and that this was helpful.
>
> Dale Leavens, Cochrane Ontario Canada
> DLeavens@xxxxxxx
> Skype DaleLeavens
> Come and meet Aurora, Nakita and Nanook at our polar bear habitat.
>
>
> ----- Original Message -----
> From: "John Miller" <n1umj@xxxxxxxxxxx>
> To: <programmingblind@xxxxxxxxxxxxx>
> Sent: Tuesday, October 09, 2007 5:30 PM
> Subject: C programming Arrays
>
>
> > Hi,
> > Is there anyone that can give a good, actually reasonably understandable
> > explanation or example of an array in C programming? In my class, the
> > book's
> > examples are horrible at best and confusing and the teacher should be
> > fired
> > his is so bad. That or I should drop the class which I was actually about
> > to
> > do but I looked and there is no other major completely online that holds
> > my
> > interest so I guess I have to stick it out for another torturous 5 weeks
> > or
> > what ever it is. I'm getting some of it, but not enough.
> > Thanks,
> > John Miller N1UMJ
> > AIM and yahoo messenger: N1UMJ Skype: n1umjjohn
> > home page:
> > http://home.comcast.net/~n1umj/wsb/html/view.cgi-home.html-.html
> > myspace: http://www.myspace.com/n1umj
> >
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--
Jackie McBride
Check out my homepage at:
www.abletec.serverheaven.net
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