473,226 Members | 1,531 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,226 software developers and data experts.

doubt on Dangling pointer

Hi All,
I have a doubt on undrestanding Dangling pointers.Below I mentioned sample code. please let me know, my view on Dangling pointers is correct or not?
main( )
{
char *a,*b,*c;

a = (char *)malloc(40);
b = a;
c = b;
free(a);
/* now c is Dangling pointer*/
is it vorrect? if not please let know with Example program ?

Thanks
Sridhar.D
Feb 15 '08 #1
1 2437
weaknessforcats
9,208 Expert Mod 8TB
Yep. b is dangling also.

This is why there is grave danger in passing naked pointers throughout your code: You don't know when it's safe to free().
Feb 15 '08 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

13
by: Aravind | last post by:
I would like to know in what manner dangling pointers affect the security of a application developed using C++.What are the loopholes that are created by dangling pointers and how they could be...
11
by: John | last post by:
Hi: Below is a simple code: class link1 { public: link1(); link1(int &b1, double &b2); int* a1;
20
by: __PPS__ | last post by:
Hello everybody in a quiz I had a question about dangling pointer: "What a dangling pointer is and the danger of using it" My answer was: "dangling pointer is a pointer that points to some...
138
by: ambika | last post by:
Hello, Am not very good with pointers in C,but I have a small doubt about the way these pointers work.. We all know that in an array say x,x is gonna point to the first element in that...
5
by: Richard | last post by:
My experience has always been that you're SOL when trying to safely detect and stop references to dangling memory (non-null pointers to free'ed blocks) at runtime (C99, Linux). Maybe somebody...
1
by: sekhar_ps | last post by:
if we store some value at the place in memory which void pointer references then we increment void pointer this leads to dangling pointer?can any one explain whats the reasons for dangling pointer
5
by: madhusagar79 | last post by:
I got one issue to find the Dangling Pointer. Is there any way to find the Dangling Pointer?
3
by: shivapadma | last post by:
1.when referenced pointer is not active then it is called dangling pointer. is this correct ? 2.the pointer which does not point to anything is called null pointer. is NULL macro is a...
3
by: gsuresh | last post by:
what is dangling pointer?can i get one example?
0
by: VivesProcSPL | last post by:
Obviously, one of the original purposes of SQL is to make data query processing easy. The language uses many English-like terms and syntax in an effort to make it easy to learn, particularly for...
3
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 3 Jan 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). For other local times, please check World Time Buddy In...
0
by: abbasky | last post by:
### Vandf component communication method one: data sharing ​ Vandf components can achieve data exchange through data sharing, state sharing, events, and other methods. Vandf's data exchange method...
0
by: fareedcanada | last post by:
Hello I am trying to split number on their count. suppose i have 121314151617 (12cnt) then number should be split like 12,13,14,15,16,17 and if 11314151617 (11cnt) then should be split like...
0
by: stefan129 | last post by:
Hey forum members, I'm exploring options for SSL certificates for multiple domains. Has anyone had experience with multi-domain SSL certificates? Any recommendations on reliable providers or specific...
0
Git
by: egorbl4 | last post by:
Скачал я git, хотел начать настройку, а там вылезло вот это Что это? Что мне с этим делать? ...
1
by: davi5007 | last post by:
Hi, Basically, I am trying to automate a field named TraceabilityNo into a web page from an access form. I've got the serial held in the variable strSearchString. How can I get this into the...
0
by: DolphinDB | last post by:
The formulas of 101 quantitative trading alphas used by WorldQuant were presented in the paper 101 Formulaic Alphas. However, some formulas are complex, leading to challenges in calculation. Take...
0
by: Aftab Ahmad | last post by:
So, I have written a code for a cmd called "Send WhatsApp Message" to open and send WhatsApp messaage. The code is given below. Dim IE As Object Set IE =...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.