Exforsys

Free Training

Pointer Problem

This is a discussion on Pointer Problem within the C and C++ forums, part of the Programming Talk category; I have my C program code as below: #include <stdio.h> main() { int *x; ... .... } My doubt is ...

Go Back   Exforsys > Programming Talk > C and C++

Exforsys.com


C and C++ C and C++

Reply

 

LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 05-08-2007, 03:50 PM
Senior Member
 
Join Date: Apr 2006
Posts: 153
cyrus is on a distinguished road
Pointer Problem

I have my C program code as below:
#include <stdio.h>
main()
{
int *x;
...
....
}

My doubt is I want to pass address of x to a function named as test as below
test(&x)
that is pass by reference. Can I pass this without initializing the pointer x or do I need to initialize pointer and then pass the address. How can I initialize if I need to do that. Kindly help me.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Sponsored Links
  #2 (permalink)  
Old 05-14-2007, 04:25 PM
Senior Member
 
Join Date: Apr 2006
Posts: 144
caradoc is on a distinguished road
You must initialize pointer and then only send it to the function as pass by reference. This is because to prevent the usage of garbage values in memory. You can initialize pointers by assigning it to NULL. In your example you need to assign the pointer x as NULL.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads

Thread Thread Starter Forum Replies Last Post
comp.lang.c Answers (Abridged) to Frequently Asked Questions (FAQ) Steve Summit Tech FAQ 0 06-15-2004 06:00 AM
comp.lang.c Answers (Abridged) to Frequently Asked Questions (FAQ) Steve Summit Tech FAQ 0 06-01-2004 06:01 AM
comp.lang.c FAQ list Table of Contents Steve Summit Tech FAQ 0 06-01-2004 06:00 AM
comp.lang.c Answers to Frequently Asked Questions (FAQ List) Steve Summit Tech FAQ 0 06-01-2004 06:00 AM
comp.lang.c Answers (Abridged) to Frequently Asked Questions (FAQ) Steve Summit Tech FAQ 0 05-15-2004 06:00 AM


All times are GMT -4. The time now is 01:53 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2010, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.3.0
Copyright 2004 - 2009 Exforsys Inc. All rights reserved.