Error C2027 Use Of Undefined Type Struct
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Invalid Use Of Undefined Type Struct C++
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Invalid Use Of Undefined Type Struct Forward Declaration
helping each other. Join them; it only takes a minute: Sign up C: “invalid use of undefined type ‘struct X’ & dereferencing pointer to incomplete type” errors up vote 4 down vote favorite I've been perusing similar questions to mine for a couple of days but still haven't found a solution. Thanks any any help: I have two error: forward declaration of files, one containing methods for dealing with rational numbers and one that handles them in a 2 dimensional array. My problem is matrix.c doesn't recognize the fraction structure in contained in fraction.c. I believe my problem is somehow related to the way I declared my 2d array. In fraction.c: struct fraction { int integer; int num; int den; }; typedef struct fraction* fractionRef; //This line is in fraction.h In matrix.c: #include "fraction.h" typedef struct matrix* matrixRef; struct matrix { int rows; int columns; fractionRef *m; }matrix; matrixRef new_matrix ( int rows, int columns ) { matrixRef matrix; matrix = (matrixRef)malloc( sizeof( matrix ) ); matrix->m = (fractionRef*)calloc( rows, sizeof( fractionRef ) ); int i; for ( i=0; i<=rows; i++ ) matrix->m[i] = (fractionRef)calloc( columns, sizeof( fractionRef ) ); assert( matrix->m ); return matrix; } void free_matrix ( matrixRef freeMe ) { if ( freeMe != NULL ){ int i, j; for( i = 0; i <= freeMe->rows; i++ ){ for ( j = 0; j <= freeMe->columns; j++ ){ free_fract
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Invalid Application Of 'sizeof' To Incomplete Type
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Dereferencing Pointer To Incomplete Type C
us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a typedef struct community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why am I getting an “use of undefined type” error in my code, when I http://stackoverflow.com/questions/5943251/c-invalid-use-of-undefined-type-struct-x-dereferencing-pointer-to-incomple have the header for it included? up vote 1 down vote favorite I'm learning C++ and am trying to write a simple game, using Direct3D. In my game project, I use a single namespace throughout my game, named GameEngine. My game logic is contained within a main class, named Game. That Game class will have member variables for things like the input manager and object manager. These will be private http://stackoverflow.com/questions/17496200/why-am-i-getting-an-use-of-undefined-type-error-in-my-code-when-i-have-the-he members, but I have a public function on my Game class that returns a pointer to the InputManager class. That way, I can tell the InputManager to handle window messages inside of my main PeekMessage loop of the program. Here's my main message loop ... // instanciate the game GameEngine::Game game(windowRectangle.bottom, windowRectangle.right); // initialize D3D game.InitializeDirect3D(hWnd); game.InitializePipeline(); // main game loop while (true) { // check for received event messages if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) { bool handled = false; if (msg.message >= WM_MOUSEFIRST && msg.message <= WM_MOUSELAST) { handled = game.GetInputManager()->HandleMouseInput(&msg); } else if (msg.message >= WM_KEYFIRST && msg.message <= WM_KEYLAST) { handled = game.GetInputManager()->HandledKeyboardInput(&msg); } else if (msg.message == WM_QUIT) { break; } if (handled == false) { TranslateMessage(&msg); DispatchMessageA(&msg); } } // render the current frame game.RenderFrame(); } // tear down D3D game.CleanDirect3D(); I'm getting an error when I call GetInputManager, though. It says I'm using an undefined type InputManager. The GetInputManager function returns a pointer to an InputManager. At the top of my Main.cpp file, in which this main message loop resides, I include the header that contains the definition of InputManager, which is InputManager.h. So, I'm not quite sure why it says this is an undefined type. Does anybody know what this error is
here for a quick overview of the site Help http://stackoverflow.com/questions/7967610/why-is-this-c-program-giving-compile-time-error-eventhough-forward-declaration Center Detailed answers to any questions you might have Meta http://www.dreamincode.net/forums/topic/286571-error-c2027-use-of-undefined-type-channel/ Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question use of x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why is this C++ program giving compile-time error eventhough forward declaration is supplied? up vote 2 use of undefined down vote favorite 1 Code: #include
Pages) 1 2 → New Topic/Question Reply 21 Replies - 5609 Views - Last Post: 23 July 2012 - 03:06 PM Rate Topic: #1 Sebi13 New D.I.C Head Reputation: 0 Posts: 45 Joined: 22-September 11 error C2027: use of undefined type 'Channel' Posted 22 July 2012 - 07:24 AM Hello, I'm having trouble compiling an application(VC++2008). I'm getting the undefined type error in one of my classes. I have two files channel.h and link.h: // channel.h class Channel { private: bool marked; ... public: ... void mark(void) { marked = true; } void unmark(void) { marked = false; } bool is_marked(void) const { return marked; } ... }; And link.h // link.h #include "nodes.h" // <= includes "channel.h" class Channel; class Link { protected: Channel *src, *dst; ... public: ... void mark_src(void) { src->mark(); } //<= error C2027: use of undefined type 'Channel' void unmark_src(void) { src->unmark(); } // <= error C2227: left of '->mark' must point to class/struct type bool is_marked_src(void) const { return src->is_marked(); } void mark_dst(void) { dst->mark(); } void unmark_dst(void) { dst->unmark(); } bool is_marked_dst(void) const { return dst->is_marked(); } ... }; I have include guards in every header file(each header file is named differently). I know this means that the compiler does not know the type 'Channel' at compile time but is there a way not to merge the files channel.h and link.h together? I don't want the implementation of the mark methods in the same .cpp file either. Many thanks in advance. Sebi Is This A Good Question/Topic? 0 Back to top MultiQuote Quote + Reply Replies To: error C2027: use of undefined type 'Channel' #2 jimblumberg Reputation: 4990 Posts: 15,622 Joined: 25-December 09 Re: error C2027: use of undefined type 'Channel' Posted 22 July 2012 - 07:27 AM Please post the complete error message exactly as it appears in your development environment. Jim Was This Post Helpful? 0 Back to top MultiQuote Quote + Reply #3 Sebi13 New D.I.C Head Reputation: 0 Posts: 45 Joined: 22-September 11 Re: error C2027: use of undefined type 'Channel' Posted 22 July 2012 - 07:28 AM jimblumberg, on 22 July 2012 - 07:27 AM, said:Please post the complete error message exactly as it appears in your development environment. Jim The errors are: 1>c:\reserach\complex_networks\noc_sim_mod_vc\link.h(46) : error C2027: use of undefined type 'Channel' 1> c:\reserach\complex_networks\noc_sim_mod_vc\li