Re: [Dev-C++] dynamic allocation and structs

[Daniel G. <sp...@ho...>]

I can help with the first - the lifetime of a variable created with malloc() 
is forever - until you call free() of course!




>From: "Scott Williams" <se...@al...>
>Reply-To: <se...@al...>
>To: <dev...@li...>
>Subject: [Dev-C++] dynamic allocation and structs
>Date: Thu, 24 Oct 2002 08:18:24 -0400
>
>Hi,
>
>I'm working in C (no C++ please).  Got a couple of questions related to
>dynamic allocation and in particular, dynamically allocating an array of
>structs.
>
>First, what is the duration of memory allocated by malloc (etc.)?  In
>particular, I want to dynamically allocate/de-allocate several global
>variables within a single subroutine called from main and so want to be 
>sure
>that the allocated memory exists beyond the scope of that subroutine.
>
>Second, it is my understanding that it is perfectly acceptable to have an
>array of structs.  E.g.,
>
>struct mystruct {
>   double var1;
>   long   var2;
>   etc...
>}
>
>. . .
>
>struct mystruct data[100];
>
>Is this correct?  If so, what then is the calling sequence to dynamically
>allocate an array of structs, and, in particularly, make the result
>available globally?
>
>Thanks for your help (& sorry if this is naive).
>
>Scott Williams
>
>
>
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