Simple problem with memo allocation

[ebuBekir]

Hi @ all!

I have problems deallocating space.

MfContour2D* profile = new MfContour2D [20];


When I try to deallocate space, I get an ‘error’(Debug Assertion Failed!) und das Programm wird abgebrochen.
if ( profile != NULL )
delete profile;

The following does not work, either.
if ( profile != NULL )
delete profile;

Does anybody have an idea, what the problem may be?
Thanks a lot,…

 

[rpet]

Have you tried


if(profile)
delete[] profile;


?

If it does not work, the pointer was maybe modified after allocating memory. Or the memory was already deleted but the pointer was not set to NULL.

 

[ebuBekir]

Sorry, I already did that. There is a mistake in my text above.
>
> if ( profile != NULL )
:> delete [] profile;
>
>The following does not work, either.
> if ( profile != NULL )
> delete profile;

 

[rpet]

What kind of assertion do you get (file name, line nr)?

 

[jtm111]

If you misused the profile array in your program it will throw this exception. Look for a situation where you might have gone over the size of the array (20).

I get this error when I make the following type of mistake:

const int Rows = 25;
const int Cols = 20;

myStruct *profile = new myStruct[20];

for (i = 0; i < Rows; i++) // Rows = 25
profile.m_data = &quot;some data&quot;; // profile holds 20

Here I inadvertently used Rows instead of Cols, so I wrote beyone the allocated memory of profile. The program might or might not run, but it will surely throw an exception when you attempt to free the profile object.