sorting with pointer of pointers to array

dunpealslyr · 09-30-2007, 05:09 PM

pictures are word a thousand words, so here is what i need to do...
http://i153.photobucket.com/albums/.../untitled-3.jpg
i got a dynamic part of D done, (kinda easy, but little crazy with dynamic delete/add :P) then i try and point the pointer of pointers to D... this is where i get confused. i make a pointer of pointer
**P and **Q
i make the pointer array of D, then make the pointer point to an array of the size of D
*P = new int[DSize];
*Q = new int[DSize];
now i get lost...
i want to make the *P to make the space for the size D, then i want those pointers, **P, to point to the locations of D, but i can figure it out... i can do it with a single pointer *P, but as soon as i do it with a double pointer P, it wont let me do anything with the dynamic array... i even tried casting it as (int *), which works, but it doesn't change a **** thing. any hints?
here is my pathetic attempt to make the make the pointer go to D in my code...
*P = D;
*Q = D;

**CornedBee** · 09-30-2007, 06:02 PM

Image link is corrupted.

Yarin · 09-30-2007, 08:33 PM

Ah. Here, it's working now.

http://i153.photobucket.com/albums/.../untitled-3.jpg

iMalc · 10-01-2007, 12:38 AM

Quote:

Originally Posted by Yarin

Ah. Here, it's working now.

http://i153.photobucket.com/albums/.../untitled-3.jpg

Um, goodbye duck?

dunpealslyr · 10-01-2007, 05:14 PM

Quote:

Originally Posted by Yarin

Ah. Here, it's working now.

http://i153.photobucket.com/albums/.../untitled-3.jpg

wow... i am going to cry. */

meow!!!
its not a duck! :P

http://i153.photobucket.com/albums/s...untitled-3.jpg

why it didn't work i dont know... maybe this will, its the same link...

**Dave_Sinkula** · 10-01-2007, 06:27 PM

Don't shoot the duck, man!

This sounded similar.

iMalc · 10-01-2007, 11:26 PM

Image link working now!

Quote:

Code:

*P = new int[DSize];
*Q = new int[DSize];

This is wrong already. you shouldn't be trying to create an array of new ints. You need to create a new array of int pointers new (int*)s. You can't assign to *P or *Q until P and Q have been asigned to either. It sounds like you have their declarations correct though.

09-30-2007, 05:09 PM	#1
dunpealslyr Registered User Join Date: Sep 2007 Posts: 2	sorting with pointer of pointers to array pictures are word a thousand words, so here is what i need to do... http://i153.photobucket.com/albums/.../untitled-3.jpg i got a dynamic part of D done, (kinda easy, but little crazy with dynamic delete/add :P) then i try and point the pointer of pointers to D... this is where i get confused. i make a pointer of pointer P and Q i make the pointer array of D, then make the pointer point to an array of the size of D P = new int[DSize]; Q = new int[DSize]; now i get lost... i want to make the P to make the space for the size D, then i want those pointers, P, to point to the locations of D, but i can figure it out... i can do it with a single pointer P, but as soon as i do it with a double pointer P, it wont let me do anything with the dynamic array... i even tried casting it as (int ), which works, but it doesn't change a *** thing. any hints? here is my pathetic attempt to make the make the pointer go to D in my code... P = D; Q = D;
dunpealslyr is offline

09-30-2007, 06:02 PM	#2
CornedBee Cat without Hat Join Date: Apr 2003 Posts: 8,492	Image link is corrupted. __________________ All the buzzt! CornedBee "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code." - Flon's Law
CornedBee is offline

09-30-2007, 08:33 PM	#3
Yarin Unregistered User Join Date: Jul 2007 Posts: 980	Ah. Here, it's working now. http://i153.photobucket.com/albums/.../untitled-3.jpg __________________ May the Source be with you.
Yarin is offline

10-01-2007, 06:27 PM	#6
Dave_Sinkula Just Lurking Join Date: Oct 2002 Posts: 5,005	Don't shoot the duck, man! This sounded similar. __________________ 7. It is easier to write an incorrect program than understand a correct one. 40. There are two ways to write error-free programs; only the third one works.*
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