X-Recipient: archive-cygwin AT delorie DOT com X-SWARE-Spam-Status: No, hits=3.2 required=5.0 tests=AWL,BAYES_40,DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,KHOP_THREADED,NML_ADSP_CUSTOM_MED,SPF_NEUTRAL,URI_HEX X-Spam-Check-By: sourceware.org Date: Sun, 13 Jan 2013 21:11:44 -0800 (PST) From: YZFury To: cygwin AT cygwin DOT com Message-ID: <3e6368c8-5f18-496c-b677-cf499369b3be@email.android.com> In-Reply-To: References: <1358135756673-95377 DOT post AT n5 DOT nabble DOT com> Subject: Re: Using the free(*ptr) routine and getting an exception, "Exception: STATUS_ACCESS_VIOLATION" MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com 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]" Sent: Sun Jan 13 23:52:50 EST 2013 To: YZFury 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