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Include Guard Not Working

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Leading to the not defined-error, of course. #4 04-Mar-2006, 09:58 davis Posts: n/a Re: #ifndef not working? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed I'm just unsure of what to include in a header for a file that only contains analog and digital pin descriptions :s posted by George Cochrane 01 Jul 2013 The following Sep 11, 2009 at 7:28pm UTC hannes (97) ok, here you are: 1
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#pragma once #ifndef VERGELIJKING_H_ #define VERGELIJKING_H_ //#include "handige_functies.h" class berekening{ protected: float beginmaat, eindmaat, uitkomst;//ok char maten[15][15];//ok float Check This Out

Thanks for your support ;-) Read-Only AuthorAndy Neil Posted17-Jul-2007 13:05 GMT ToolsetNone I think you have entirely missed the point! What are you trying to accomplish -- have one set of these declared globally somewhere? posted by George Cochrane 29 Jun 2013 Comment on this question Please login to post comments. 3 Answers Ad van der Weiden 3 years, 4 months ago. share|improve this answer answered Nov 30 '11 at 23:29 Lex R 808728 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google http://stackoverflow.com/questions/8334416/ifndef-not-working-as-expected

Include Guard Not Working

why? What is the point of update independent rendering in a game loop? I don't know how to improve upon what Dave said except maybe to explain some of the reasons why globals should be avoided. What you want is to define it once and declare it everywhere you need to use it.

Will it still retain its value throughout all files it's used in? Only one file ought to have those objects declared unless the preprocessor doesn't keep the definitions when starting to work on another file. For me, debugging is more annoying than typing parameters into function calls. etc.?

I donÂ't use #undefÂ's anywhere in code! #ifndef share|improve this answer answered Mar 23 '12 at 6:57 GManNickG 234k29349471 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign Be very careful when porting from C30 to C32. What is the point of update independent rendering in a game loop?

At link time, the linker finds them both and complains. File containing int main() was the main file and its header was the main header. I don't want to do research (First year tenure-track faculty) Lab colleague uses cracked software. Maybe you could post a bit of code so all of us can have a look.

#ifndef

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Read More accept and hide this message Report Content × Spam Inappropriate Cancel Access Warning You do not have the With my clumbsy novice code, I've decided that the only pin that both .cpp files use can just be an input for my "readknobs" function. Include Guard Not Working This means the preprocessor state is reset between the two compiles, and you lose the definition of PAL_INCLUDE Header guards stop a header from being included more than once by other That way it's only defined in one place.

Hence, you need to include it. http://virtualthought.net/not-working/include-virtual-not-working-html.html c++ redefinition share|improve this question edited Feb 17 '15 at 20:27 asked Feb 17 '15 at 19:58 farukdgn 504316 Do you have any other source files that also #include Don't show this message again Change Settings Privacy Policy Update ARM’s Privacy Policy has been updated. Am I missing a subtlety of the C30 compiler?

Why does my #ifndef not work? Previous examples of large scale protests after Presidential elections in US? Accept and hide this message /forum/docs/thread10237.asp GIDForums > Computer Programming Forums > C Programming Language #ifndef not working? http://virtualthought.net/not-working/php-include-javascript-not-working.html But x.h is still included twice, once for each translation unit.

Make sure you use the ANSI C keyword extern in the header file to tell the compiler that it's a declaration of a variable or function and not a (obviously multiple) The file is types.h // ---------------------------------------- // Filename: types.h // Description: Declares new type definitions // Original Author: Dr XXXXXXXXXXXXXXX // Date: 03-Apr-06 // Adapted for the PIC24F by: XXXXXXXXXXXXXXX // At the end, resulting c file will have only one definition of INT.

With extern , both Main.cpp and Secondary.cpp know that HelloWorld is a string and can use it as such.

I feel like I tried so many permutations, but your example does what I need very well. share|improve this answer edited Mar 23 '12 at 7:07 Jonathan Leffler 444k62516830 answered Mar 23 '12 at 6:52 Alok Save 141k24276425 add a comment| up vote 0 down vote You are Topic archived. If the header file must be seen by multiple source files, you can't use it to allocate global variables, since the linker would then complain about multiple sets of global variables

Your Mileage May Vary. Also, don't use those kinds of header guards; names beginning with an underscore followed by a capital, as well as those beginning with two consecutive underscores are reserved. Each CPP file is a separate compilation unit, so both Main.cpp and Secondary.cpp are going to be able to include Main.h , even with the include guard. navigate here However, these are nothing new.

When you create a variable in the header file, a copy of the variable with the same name gets created in every translation unit where you include the header. Mr.M 32 735 posts since Dec 2012 Community Member More Recommended Articles About Us Contact Us Donate Advertising Vendor Program Terms of Service Newsletter Archive Community Forums Recent Articles © 2002 Why would this A-10 Thunderbolt be deployed over rural New Hampshire?