Login with LinkedIN Or Log In Locally Email or Username Password Remember Me Forgot Password?Register ENGINEERING.com Eng-Tips Forums Tek-Tips Forums Search Posts Find A Forum Thread Number Find An Expert on the top of the header file, do this: #ifndef NULL #define NULL (0) #endif share|improve this answer edited Mar 21 '13 at 14:30 answered Mar 21 '13 at 14:11 Aniket By joining you are opting in to receive e-mail. I am trying to set a NULL value to the variable head (in the constructor of Movie_LinkedList), but I got: movie.h(40): error C2065: 'NULL' : undeclared identifier please note that I Check This Out
Search Engine Optimisation provided by DragonByte SEO v2.0.32 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd. Search for NULL - Veni Vidi What? NULL is a implementation-defined macro that represents the null pointer constant (18.1.4 in the standard). Can Klingons swim? http://stackoverflow.com/questions/15549873/set-head-to-null-null-undeclared-identifier
Back to top #9 quorn3000 Members -Reputation: 819 Like 0Likes Like Posted 20 October 2004 - 10:55 PM Quote:Original post by Programmer16Oh, and since the topic is up, if NULL Use nullptr. share|improve this answer edited Jul 29 '13 at 13:27 GManNickG 231k29346470 answered May 29 '09 at 6:34 unwind 254k38331460 5 NULL is part of stddef.h, not stdlib.h.
That bit me later when I switched to GCC. [edited by - aldacron on February 16, 2004 8:59:19 PM] Back to top #20 Fruny Moderators -Reputation: 1654 Like Likes Like Register now while it's still free! If you set a variable to NULL, then to anyone reading that code, the implication is that the variable is a pointer.You can know that a variable is a pointer by Error C2065 '__func__' Undeclared Identifier That way I can pass it around to other functions and they don't have to check for valid pointers to objects.
I prefer to avoid macros, so I use 0. Error C2065 'cout' Undeclared Identifier Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. d:\boost\boost\boost\thread\win32\thread_primitives.hpp(184) : error C2065: 'NULL' : undeclared identifier d:\boost\boost\boost\thread\win32\thread_primitives.hpp(184) : error C2065: 'NULL' : undeclared identifier I propose to add #include
Other code can define NULL differently, or can even undefine NULL and redefine it after other headers are included and do anything they want.Finally, saying that you use NULL to show Error C2065 'ifstream' Undeclared Identifier Back to top #15 nmi Members -Reputation: 978 Like 0Likes Like Posted 21 October 2004 - 12:19 AM Include stddef.h to get NULL defined. Heathrow to Gatwick and traffic jam Proof of infinitely many prime numbers Converting SCART to VGA/Jack Can Homeowners insurance be cancelled for non-removal of tree debris? Back to top #6 Andy Gainey Members -Reputation: 3425 Like Likes Like Posted 16 February 2004 - 12:14 PM Maybe you simply don''t include any standard library files?
Quick Navigation C++ Programming Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums General Programming Boards C++ Programming C Programming C# Programming Game Programming Networking/Device Communication http://www.gamedev.net/topic/207884-what-the-heck----null-undeclared/ Hope is the first step on the road to disappointment. Visual C++ Null Undeclared Identifier Use nullptr. Error C2065 'cin' Undeclared Identifier Physically locating the server A power source that would last a REALLY long time My math students consider me a harsh grader.
It is coming...10 years in the making and It is finally coming-Beavt8r... http://birdsallgraphics.com/error-c2065/error-c2065-vc.php Because of this, the C NULL definition (0 void pointer value) worked perfectly to only allow NULL to be used with pointers but not other built-in types. Join them; it only takes a minute: Sign up set head to NULL ('NULL' : undeclared identifier) up vote 3 down vote favorite I defined a linked list in C++. Is the sum of two white noise processes also a white noise? Error C2065 'hmonitor' Undeclared Identifier
Never underestimate the importance of knowing what something is and using the right word, even if the compiler will let you get away with it! –imallett Jul 7 '13 at 0:30 Get Started with C or C++ C Tutorial C++ Tutorial Get the C++ Book All Tutorials Advanced Search Forum General Programming Boards C++ Programming 'NULL' : undeclared identifier Getting started with Back to top #15 hplus0603 Moderators -Reputation: 10375 Like Likes Like Posted 16 February 2004 - 12:54 PM 1) Make sure you include
Like running off the end of an array, dereferencing null pointers, etc etc. Error C2065 'cstring' Undeclared Identifier Close Reply To This Thread Posting in the Tek-Tips forums is a member-only feature. As stupid as it sounds, it happens.
Are you aComputer / IT professional?Join Tek-Tips Forums! Here's Why Members Love Tek-Tips Forums: Talk To Other Members Notification Of Responses To Questions Favorite Forums One Click Access Keyword Search Of All Posts, And More... Back to top #11 Christian R Members -Reputation: 122 Like Likes Like Posted 16 February 2004 - 12:44 PM http://oakroadsystems.com/tech/cppredef.htm .. Error C2065 'vector' Undeclared Identifier share|improve this answer answered Oct 10 '11 at 14:36 Pete Houston 10.4k33050 yes.
Should I serve jury duty when I have no respect for the judge? Back to top #3 stormrunner Members -Reputation: 720 Like 0Likes Like Posted 20 October 2004 - 05:04 PM NULL is a c/c++ macro, so a few headers do define it. It might include some I''m unaware of, but try using rand() without manually including cstdlib and see what happens... http://birdsallgraphics.com/error-c2065/error-c2065-in-c.php RE: error C2065: Undeclared Identifier jamez05 (Programmer) (OP) 21 Jul 06 13:58 Thanks cpjust, that's exactly what's happening.I willchange it back and add
Join UsClose Search: LoginHelp/GuideAbout TracPreferences WikiTimelineRoadmapView TicketsNew TicketSearch Context Navigation ← Previous TicketNext Ticket → Server Load Average: 0.56 Modify ↓ Ticket #1547 (closed Bugs: fixed) Opened 9 years ago Last Can Tex make a footnote to the footnote of a footnote? Incidentally, it's both good that one documents one uses a pointer, but also good one documents that one actually puts an integer forward. Subscribed!