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Nige
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 Posted: Wed Dec 07, 2005 4:38 am Post subject: Help a newbie |
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Looking at some sample code.
I have a line, which calls a function
and the 3rd parameter is @Cells^[0]
whats do the @ and the ^ and the [0] indicate.
thanks |
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Nicholas Sherlock
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| Posted: Wed Dec 07, 2005 4:55 am Post subject: Re: Help a newbie |
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Nige wrote:
| Quote: | @Cells^[0]
whats do the @ and the ^ and the [0] indicate.
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The whole thing gives you the address of (@) the fist item ([0]) of the
memory that cells uses (^). Read some tutorials on pointers.
Cheers,
Nicholas Sherlock |
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Jamie
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| Posted: Wed Dec 07, 2005 9:06 am Post subject: Re: Help a newbie |
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Nige wrote:
| Quote: | Looking at some sample code.
I have a line, which calls a function
and the 3rd parameter is @Cells^[0]
whats do the @ and the ^ and the [0] indicate.
thanks
The @ generates an address of an item. |
so lets break this down.
Cells is being treated like a pointer and
thus the use of ^ meaning that you are
fetching data via the pointer which is like
a road map giving directions of where the
start of the data which makes up the object
"CELLS" resides in.
Since it's obvious that Cells must not
be a pointer already to start with, using the
@ infront will generate a pointer address of that
object.
and the use of the [0] is like any other
array from that point on.
it will simply use the Pointer address as the
starting base with the an offset of what
ever in the [?] to calculate the distant to
move from the start of the pointer.
--
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5 |
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Bruce Roberts
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| Posted: Wed Dec 07, 2005 8:13 pm Post subject: Re: Help a newbie |
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"Nige" <nkarnold (AT) blueyonder (DOT) co.uk> wrote in message
news:Ihplf.160032$Es4.143191 (AT) fe2 (DOT) news.blueyonder.co.uk...
| Quote: | Looking at some sample code.
I have a line, which calls a function
and the 3rd parameter is @Cells^[0]
whats do the @ and the ^ and the [0] indicate.
|
The code won't compile. In any case it is nonsensical. @Cells and Cells
mean the same thing as does Cells^ and Cells, presuming Cells is the name
of an array. |
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Riki Wiki Google
Guest
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| Posted: Mon Dec 12, 2005 1:38 am Post subject: Re: Help a newbie |
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Hoi Nige + others
When you post in a borland.public... news group you need to post on the
Borland news server to make everybody see it. Further, this news group
b.p.delphi do not officially exist.
Take a look here:
<http://tinyurl.com/8m5nw>
which links to
<http://delphi.wikicities.com/wiki/Delphi_Newsgroups> |
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DrChaos
Guest
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| Posted: Thu Dec 15, 2005 10:09 pm Post subject: Re: Help a newbie |
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Nige wrote:
| Quote: | Looking at some sample code.
I have a line, which calls a function
and the 3rd parameter is @Cells^[0]
whats do the @ and the ^ and the [0] indicate.
thanks
@ = adress of |
^ dereferences a pointer
[x] is the x'th position in a list or array. |
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