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Date: Mon, 11 Mar 2002 13:07:31 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Giovanni Spagnuolo <spanish AT ieee DOT org>
cc: djgpp AT delorie DOT com
Subject: Re: new[] and delete[]
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On Mon, 11 Mar 2002, Giovanni Spagnuolo wrote:

>         cout<<"before allocation"<<endl;
>         cout<<_go32_dpmi_remaining_physical_memory()<<endl;
>         cout<<_go32_dpmi_remaining_virtual_memory()<<endl<<endl;
>         
>         int * v = new int[N];
>         
>         cout<<"after allocation"<<endl;
>         cout<<_go32_dpmi_remaining_physical_memory()<<endl;
>         cout<<_go32_dpmi_remaining_virtual_memory()<<endl<<endl;
>         
>         delete [] v;
>         
>         cout<<"after disallocation"<<endl;
>         cout<<_go32_dpmi_remaining_physical_memory()<<endl;
>         cout<<_go32_dpmi_remaining_virtual_memory()<<endl<<endl;
> 
>         return 0;
> }
> 
> Nevertheless it seems that the disallocated memory does not become newly
> free.

See section 15.2 of the DJGPP FAQ list, it explains why this is expected 
behavior.

What are you trying to accomplish, really?  Since this is a toy program, 
I assume you have something more serious in mind; if you tell what that 
is, perhaps someone can suggest a solution.