memory allocation/deallocation

[earth_angel]

Hi,

I'm trying to figure the error message that I get when trying to deallocate an array of pointers I'm allocating.
Here's the allocation and free'ing lines:

CMyEdit *txtboxf[50];
txtboxf[i] = new CMyEdit();

free(txtboxf);

in run-time I get an error that Bebud assertion failed! in File:dbgheap.c

The same problem occures with this:

char line[80];

free(line);

I've read tutorials and I think I'm doing what they are telling me. How do I free arrays properly?

[Dave_Sinkula]

The same problem occures with this:

char line[80];

free(line);

I've read tutorials and I think I'm doing what they are telling me. How do I free arrays properly?

You don't free arrays. You only free memory that was allocated using malloc/realloc/calloc.

[earth_angel]

Even if it's an array of pointers?

[Dave_Sinkula]

A pointer is not an array. In your examples, line is an array; txtboxf is an array of pointers (txtboxf[i] would be one such pointer, for example). You can free the memory allocated to each of the pointers. But you can't free an array.

And don't mix new and free.

[earth_angel]

>> And don't mix new and free.
I checked for that.

Thanks.

AS

[Daved]

What happened to using vectors?

[earth_angel]

just to check. If I have something like this:

Params = (char **)calloc(NumParam, sizeof(char *));

   for(i=0; i<NumParam; ++i)
	   Params[i] = (char*)calloc(NameLengthP , sizeof(char));

I would free(Params[i]) first and then free(params), right?

[earth_angel]

>> What happened to using vectors?

Nothing, why?

[Daved]

I remember earlier posts of yours that used vectors. I was wondering why you weren't using a vector in this case. You wouldn't have to worry about new/delete or free (or malloc or calloc).

You seem to be mixing C and C++ style. You should probably pick one and stick with it unless you have a specific reason not to.

[earth_angel]

I use vector for lists of unknown size. These guys I know exactly how big they are dynamically.

C and C++, I started writign in C, but then I needed a GUI. So I had to use the code as event handlers for VC++ controls. I didn't want to re-write it all in C++. There was too much. I do try to keep it in line as use as little C as possible now, and I usually don't.

[Daved]

Ok. Fair enough.