Whoops. I was making the pointer point to x instead of putting x's value in
the memory that was just allocated. Now i understand that. Really sorry for a
stupid syntax error question on my part. thanks for the quick reply though :).
Like I said basically new to C.
Sent from my Kindle Fire
_____________________________________________
From: "Dan Kegel-2 [via Cygwin]" <ml-node+s1069669n95381...@n5.nabble.com>
Sent: Sun Jan 13 23:52:50 EST 2013
To: YZFury <yzf...@gmail.com>
Subject: Re: Using the free(*ptr) routine and getting an exception, "Exception:
STATUS_ACCESS_VIOLATION"
On Sun, Jan 13, 2013 at 7:55 PM, YZFury <[hidden email]> wrote:
> int *ptr = malloc(sizeof(*ptr));
> int x = 87;
> ptr = &x;
> printf("%d", *ptr);
> free(ptr);//it goes wrong here
As you probably know, you can't call free() on a pointer
that didn't come from malloc(). ptr's first value came from malloc,
but you overwrote that with
ptr = &x;
Perhaps you meant
*ptr = x;
So you're a level of indirection off.
- Dan
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
_____________________________________________
If you reply to this email, your message will be added to the discussion below:
http://cygwin.1069669.n5.nabble.com/Using-the-free-ptr-routine-and-getting-an-exception-Exception-STATUS-ACCESS-VIOLATION-tp95377p95381.html
To unsubscribe from Using the free(*ptr)
routine and getting an exception, "Exception: STATUS_ACCESS_VIOLATION", click
here.
NAML
--
View this message in context:
http://cygwin.1069669.n5.nabble.com/Using-the-free-ptr-routine-and-getting-an-exception-Exception-STATUS-ACCESS-VIOLATION-tp95377p95382.html
Sent from the Cygwin list mailing list archive at Nabble.com.
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
