memory allocation problem

That's just fine. I think you're getting confused between allocating the object that contains the pointers, and allocating memory for the pointer member themselves. Pointers are variables in themselves, taking up 4 bytes on 32-bit systems.

The statement you provided will allocate an array of type something, size determining how many elements there will be. If you then want to allocate memory for the individual members, you would do something like this:

s[0].x = (constructer*)malloc(size*sizeof(constructer));
s[0].y = (int*)malloc(size*sizeof(int));

If you allocated an array of somethings, then you can change the index accordingly.

[edited by - Zipster on December 30, 2002 2:32:50 AM]

I did allocate them seperately sorry for not mentioning. Well it seems then, that the problem lies somewhere else.
Posibly in the calculation of size eventhough i checked that too. I''ll have to continue searching thanks for the help
-CProgrammer

Well, what''s the problem exactly? What kind of behavior are you experiencing?

I did allocate them seperately sorry for not mentioning. Well it seems then, that the problem lies somewhere else.
Posibly in the calculation of size eventhough i checked that too. I'll have to continue searching thanks for the help

The problem is in my QuadTree heres the algorithm calulating the size:

int i;
//example values
xdim = 1024
int leaflength = 16;
numleaves = (xdim/leaflength)*(xdim/leaflength);
numnodes = 1;
int tempn = 1;

for(i = 0; i < (xdim/4)/leaflength; i++)
{
    numnodes+=4*tempn;
    tempn = 4*tempn;
}
   

//This memory alocaion
nodes = (NODE*)malloc((numnodes+numleaves)*sizeof(NODE));

//the pointers in node are allocated later on

sorry didnt see youre post.
Behavior: Unless multiply the size by around 200 (of nodes memory) the application crashes after some time in the CREATENODE function


[edited by - CProgrammer on December 30, 2002 2:52:04 AM]

[edited by - CProgrammer on December 30, 2002 2:54:04 AM]