Exchange pointers

Lasering · 11-08-2009, 10:44 AM

Hi!!

I have a type queue_t, its a head of a linked list. Then I have these variables:

queue_t *exe_thr_list[15];
queue_t *expired_thr_list[15];

They are arrays of 15 elements, where each element is a pointer to queue_t (Pretty obvious).

So far so good. Now I want to make a function to swich them. What I mean is:

what ever exe_thr_list points to must (after the function is called) point to whaever expired_thr_list points to. And vice versa. In other words to swich the two arrays.

I made this obviously wrong code:

Code:

queue_t *tmp_queue[15];
tmp_queue = exe_thr_list;
exe_thr_list = expired_thr_list;
expired_thr_list = tmp_queue;

Wrong because I can't compile it with gcc, getting the following error:

error: incompatible types in assignment

in the last three lines of code.

Can someone point me to the light (LOOOL)??

MK27 · 11-08-2009, 10:57 AM

Quote:

Originally Posted by Lasering

Can someone point me to the light (LOOOL)??

With an array you must do this:

Code:

for (i=0; i<15; i++) ray_two[i] = ray_one[i];

Make sense?

Lasering · 11-08-2009, 11:36 AM

Actually not. Because its like take you are putting the values of array one in array two, but now putting the values os array two in one.

Anyway I think I can resolve my problem with that code.

Thks a lot!!.

Adak · 11-08-2009, 12:48 PM

This is the fastest 180 degree turn yet seen, on the forum!

Those are *some* tires you have there Lasering.

11-08-2009, 10:44 AM	#1
Lasering Registered User Join Date: Nov 2009 Posts: 2	Exchange pointers Hi!! I have a type queue_t, its a head of a linked list. Then I have these variables: queue_t exe_thr_list[15]; queue_t expired_thr_list[15]; They are arrays of 15 elements, where each element is a pointer to queue_t (Pretty obvious). So far so good. Now I want to make a function to swich them. What I mean is: what ever exe_thr_list points to must (after the function is called) point to whaever expired_thr_list points to. And vice versa. In other words to swich the two arrays. I made this obviously wrong code: Code: queue_t *tmp_queue[15]; tmp_queue = exe_thr_list; exe_thr_list = expired_thr_list; expired_thr_list = tmp_queue; Wrong because I can't compile it with gcc, getting the following error: error: incompatible types in assignment in the last three lines of code. Can someone point me to the light (LOOOL)??
Lasering is offline

11-08-2009, 11:36 AM	#3
Lasering Registered User Join Date: Nov 2009 Posts: 2	Actually not. Because its like take you are putting the values of array one in array two, but now putting the values os array two in one. Anyway I think I can resolve my problem with that code. Thks a lot!!.
Lasering is offline

11-08-2009, 12:48 PM	#4
Adak Registered User Join Date: Sep 2006 Posts: 2,502	This is the fastest 180 degree turn yet seen, on the forum! Those are some tires you have there Lasering.
Adak is offline

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