Error Redefinition
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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 error redefinition of typedef Business Learn more about hiring developers or posting ads with us Stack Overflow Questions error redefinition of 'class Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, error redefinition of ‘class just like you, helping each other. Join them; it 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 error redefinition of c++ previously defined here". Please what does this error means? c++ gcc compiler-construction share|improve this question asked Apr 2 '09 at 1:00 caesar add a comment| 3 Answers 3 active oldest votes up vote 20 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
Error Redefinition Of ‘struct
at the top/end of your header files: #ifndef _MYFILE_H_ #define _MYFILE_H_ ... #endif Replace MYFILE with the name of your file, and replace ... with the contents of the header file. share|improve this answer edited Apr 2 '09 at 7:11 unwind 254k38331460 answered Apr 2 '09 at 1:18 Brian R. Bondy 198k82474572 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| Did you find this question interesting? Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox (see an example). Subscribed! Success! Please click the link in the confirmation email to activate your subscription. 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 c
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Error Redefinition Of Class C++
about Stack Overflow the company Business Learn more about hiring developers or posting error redefinition of 'struct iovec' ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack error redefinition of default argument Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up error: redefinition of class up vote 2 down vote favorite 2 http://stackoverflow.com/questions/707920/gcc-compiler-error-redefinition-previously-defined Here's my code: // in main.cpp #include "iostream" #include "circle.cpp" #include "rectangle.cpp" #include "shape.cpp" using namespace std; int main() { Shape shapes[10]; for (int i = 0; i < 10; i++){ if (i % 2) shapes[i] = Circle(5); else shapes[i] = Rectangle(10, 10); cout << shapes[i].getArea(); } return 0; } // in circle.cpp #include "shape.cpp" class Circle : public Shape { private: int radius; static const double PI = http://stackoverflow.com/questions/26179408/error-redefinition-of-class 3.14159265358979323846; public: Circle (int radius) : radius(radius) {} virtual int getArea() const { return PI * radius*radius; }; virtual int setRadius(int radius){ radius = radius; } }; // in rectangle.cpp #include "shape.cpp" class Rectangle : public Shape { private: int width; int height; public: Rectangle(int width, int height) : width(width), height(height){} virtual int getArea() const { return width * height; } virtual void setWidth(int width){ this->width = width; } virtual void setHeigth(int height){ this->height = height; } }; // in shape.cpp class Shape { public: virtual int getArea() const = 0; }; When compiling, I get this error: error: redefinition of 'class Shape' How can I fix this? c++ compiler-errors share|improve this question asked Oct 3 '14 at 12:59 Aviv Cohn 2,01031243 Check out "include guards" or #pragma once for compilers that support something like that. It looks like the header may be included several time. And the whole including cpp files... this is not normally how it is done. –Niall Oct 3 '14 at 13:03 add a comment| 2 Answers 2 active oldest votes up vote 7 down vote accepted You should structure your code between .h (headers) and .cpp files (implementation). You should include header files: .h Never include .cpp fi
Sign in Pricing Blog Support Search GitHub This repository Watch https://github.com/nodejs/node-gyp/issues/972 164 Star 2,585 Fork 470 nodejs/node-gyp Code Issues 200 Pull requests 12 Projects 0 Wiki Pulse Graphs New issue error C2373: '__pfnDliNotifyHook2': redefinition; #972 Closed zetsingithub opened this Issue Jul 1, 2016 · 20 comments Projects None yet Labels None yet Milestone No error redefinition milestone Assignees No one assigned 14 participants zetsingithub commented Jul 1, 2016 ERR win_delay_load_hook.c C:\Users\zetsin\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\src\win_delay_load_hook.c(34): error C2373: '__pfnDliNotifyHook2': redefinition; different type modifiers [D:\GitHub\node-winode\node_modules\ref\build\binding.vcx proj] C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\delayimp.h(134): note: see declaration of '__pfnDliNot ifyHook2' WHILE npm install ref ENV Microsoft Windows [Version 10.0.10240] error redefinition of (c) 2015 Microsoft Corporation. All rights reserved. >node -v v4.4.7 >npm -v 3.10.2 >node-gyp -v v3.4.0 >python -V Python 2.7.12 >msbuild /ver 14.0.25420.1 Node.js Foundation member addaleax commented Jul 1, 2016 npm -g install npm@next? 👍 64 😄 5 🎉 14 ❤️ 15 zetsingithub commented Jul 1, 2016 Thanks a lot, @addaleax 👍 Something wrong happened: "...\npm\node_modules\npm\node_modules\node-gyp\src\win_delay_load_hook.cc':** No such file or directory after npm -g install npm@next So I did that: cd "...\npm\node_modules\npm\ npm install It works, finally zetsingithub closed this Jul 1, 2016 Node.js Foundation member addaleax commented Jul 1, 2016 Something wrong happened: That does not look like something that should happen. Do you still have the npm-debug.log from that installation attempt? zetsingithub commented Jul 1, 2016 • edited Let me do it again. rd/s/q "...\npm\node_modules\npm" npm -g install npm@next cd "...\npm\node_modules\npm\node_m