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Error Redefinition Of Typedef

company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags error redefinition of typedef 'gliststore' Users Badges Ask Question 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 error redefinition of ‘class takes a minute: Sign up Redefinition errors in .h files up vote 6 down vote favorite //list.h file typedef struct _lnode{ struct _lnode *next; size_t row; size_t column; short data; }lnode; typedef struct _llist{ struct _lnode *head; size_t size; }llist; //matrix.h file typedef struct _matrix{ size_t width; size_t height; size_t k; int **data; }matrix; //smatrix.h file #include "list.h" #include "matrix.h" typedef

Error Redefinition Of ‘struct

struct _smatrix{ size_t width; size_t height; size_t k; llist data; }smatrix; smatrix* make_smatrix(matrix *m); smatrix.h file includes list.h file and matrix.h files. If I include those header files in smatrix.h file then I get redefinition of 'lnode'. redefinition of '_llist' and redefinition of '_matrix' errors. If I took those heder files our from smatrix.h file then the error went away but it complains about matrix type in the function parameter. I want to call functions defined in list.h and matrix.h files in smatrix.c file.. What do I do? Thanks in advance.. c share|improve this question edited Apr 29 '15 at 17:48 BartoszKP 22.2k84067 asked Mar 25 '11 at 8:18 LCYSoft 3,2791160116 add a comment| 4 Answers 4 active oldest votes up vote 12 down vote accepted Possible problem of multiple inclusions. Try to guard your header files with file list.h #ifndef _LISTH_ #define _LISTH_ #endif file matrix.h #ifndef _MATRIXH_ #define _MATRIXH_ #endif It will prevent you too have redefinitions if you have a loop in header inclusions. share|improve this answer edited Mar 25 '11 at 8:29 answered

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers error redefinition of 'struct iovec' or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x error redefinition of default argument 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

Error Redefinition Of Typedef 'glistmodel'

only takes a minute: Sign up GCC compiler error: “redefinition…previously defined” up vote 7 down vote favorite 3 I'm getting a lot of " redefinition of x....x previously defined here". Please what does this error means? c++ gcc compiler-construction share|improve http://stackoverflow.com/questions/5430019/redefinition-errors-in-h-files this question asked Apr 2 '09 at 1:00 caesar add a comment| 3 Answers 3 active oldest votes up vote 19 down vote You need to limit each file from being included only once. You can do this in 2 ways. 1) At the top of your header files put: #pragma once Or 2) if your compiler doesn't support that, put at the top/end of your header files: #ifndef _MYFILE_H_ #define _MYFILE_H_ ... #endif Replace MYFILE with the name of your http://stackoverflow.com/questions/707920/gcc-compiler-error-redefinition-previously-defined file, and replace ... with the contents of the header file. share|improve this answer edited Apr 2 '09 at 7:11 unwind 253k38330460 answered Apr 2 '09 at 1:18 Brian R. Bondy 197k82472571 1 I think that #pragma only works in VC++, not in gcc. The #define trick is portable. –Gorpik Apr 2 '09 at 7:19 supoprted by gcc and vc++ –Brian R. Bondy Apr 2 '09 at 10:29 Wikipedia says #pragma once is supported by VC++ and gcc en.wikipedia.org/wiki/Pragma_once . –Max Lybbert Apr 3 '09 at 20:48 #pragma works fine with gcc.. I'm using it at this very moment after I reading about it and it solved a ton of errors! –mmoment Sep 7 '12 at 14:13 add a comment| up vote 9 down vote The error means that there is a symbol that has been defined in one place and an alternate definition has been made in another place. This can occur if in cases like: if you define two functions with the same name if there is a mismatch between a function and it's prototype you call a non-trivial function before it has been defined, and without a prototype In this last case there will be a mismatch between the real function and the "implicit declaration" that the compiler assumes when it doesn't have a prototype to use. These situations can be avoided by: Ensuring that function prototypes are

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about http://stackoverflow.com/questions/19965300/c-error-message-redefinition-of-functions 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 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 C++ Error message redefinition of functions up vote 2 down vote favorite I error redefinition am using two stacks to implement a queue class. My header file looks like: #ifndef _MyQueue_h #define _MyQueue_h using namespace std; template class MyQueue { public: MyQueue(); ~MyQueue(); void enqueue(T element); T peek(); void dequeue(); int size(); bool empty(); private: int count; stack stk1; stack stk2; }; # include "MyQueue.cpp" # endif And my cpp (implementation) file looks like: #include #include "MyQueue.h" using namespace std; template MyQueue::MyQueue() { count = 0; } template MyQueue::~ MyQueue() { } template void MyQueue::enqueue(T element) { stk1.push(element); count ++; } (other functions omitted). However, using Xcode 4.5, it keeps saying that my functions (MyQueue, ~MyQueue, enqueue, peek, etc.) are redefined. Can anyone help me to clarify where have I redefined them? Thank you c++ class stack queue redefinition share|improve this question asked Nov 13 '13 at 22:02 Hayden Coyle 11112 2 You should never include a source file (i.e files ending in .cpp, .cc, or .C). Also, make sure to include the header file in which your stack is defined, unless you are using the STL stack. –noobProgrammer Nov 13 '13 at 22:07 add a comment| 3 Answers 3 active oldest votes up vote 5 down vote You're trying something which I really don't like. It's a pretence. Remove #include "MyQueue.cpp", replace it with the content of MyQueue.cpp, delete the file MyQueue.cpp. Now everything will work. You are trying to pretend the template code can be split into header file and implementation file. But because it can't you have to cheat by including the implementation file in the header file. It's less confusing if you don't cheat or pretend and jus

 

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