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NNTP-Posting-Date: Fri, 13 Jan 2012 12:04:24 -0600
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Date: Fri, 13 Jan 2012 12:04:22 -0600
Subject: Re: How to free this memory?
From: Bint <bint@ign.com>
Newsgroups: comp.lang.c++
Message-ID: <CB35CE46.B9A1%bint@ign.com>
Thread-Topic: How to free this memory?
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> On 13/01/2012 17:37, Paul <pchrist wrote:
>> "Bint"<bint@ign.com>  wrote in message news:CB35C06F.B997%bint@ign.com...
>>> Hello, I am allocating some vertices to pass to a function, and then I
>>> want
>>> to free the memory.  How do I do this?  The compiler is giving me warnings
>>> when I do it this way:
>>> 
>>>         trivertex **vertices;
>>> 
>>>         vertices = new trivertex*[2];
>>> 
>>>         vertices[0] = new trivertex[100];
>>>         vertices[1] = new trivertex[50];
>>> 
>>> .
>>> .
>>> .
>>>         delete vertices[0];
>>>         delete vertices[1];
>>>         delete vertices;
>>> 
>>> I get this warning:
>>> " 'delete' applied to a pointer-to-array type 'trivertex *' (aka 'double
>>> (*)[3]') treated as delete"
>>> 
>>> 
>>> Thanks!
>>> B
>> 
>> Hi
>> 
>> You should use delete[] , to delete memory allocated with new [].
>> So...
>> delete[] veritces[0];
>> delete[] vertices[1];
>> delete[] vertices;
> 
> Yes you do delete[] what you new[] however the poster should use
> std::vector as Alf suggests; it is very rare that you need to use
> dynamically allocated arrays these days.
> 
> One use-case for dynamically allocated arrays is when you want a
> dynamically sized *uninitialized* buffer.
> 
> /Leigh

I don't have any experience with namespaces or std:vector.  I will try it
and see if what Alf posted works in my code.

But if delete[] works, then what is wrong with using it?

Thanks
B