Redefinition Of Class Error
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Redefinition Of Class C++ Inheritance
Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: redefinition of class c++ xcode Sign up Why am I getting this redefinition of class error? up vote 6 down vote favorite 1 Apologies for the code dump: gameObject.cpp: #include "gameObject.h" class gameObject { private: int x; int y; public: gameObject() { x = 0; y = 0; } gameObject(int inx, int iny) { x = inx; y = iny; } ~gameObject() { // } int add() { c++ redefinition of variable return x+y; } }; gameObject.h: class gameObject { private: int x; int y; public: gameObject(); gameObject(int inx, int iny); ~gameObject(); int add(); }; Errors: ||=== terrac, Debug ===| C:\terrac\gameObject.cpp|4|error: redefinition of `class gameObject'| C:\terrac\gameObject.h|3|error: previous definition of `class gameObject'| ||=== Build finished: 2 errors, 0 warnings ===| I can't figure out what's wrong. Help? c++ class redefinition share|improve this question edited Mar 14 '14 at 8:09 sellibitze 18.1k24076 asked Sep 19 '10 at 16:26 Dataflashsabot 4362922 add a comment| 7 Answers 7 active oldest votes up vote 22 down vote accepted You're defining the class in the header file, include the header file into a *.cpp file and define the class a second time because the first definition is dragged into the translation unit by the header file. But only one gameObject class definition is allowed per translation unit. You actually don't need to define the class a second time just to implement the functions. Implement the functions like this: #include "gameObject.h" gameObject::gameObject(int inx, int iny) { x = inx; y = iny; } int gameObject::add() { return x+y; } etc share|improve this answer answer
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Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign http://stackoverflow.com/questions/3746484/why-am-i-getting-this-redefinition-of-class-error up error: redefinition of class up vote 2 down vote favorite 2 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; } // http://stackoverflow.com/questions/26179408/error-redefinition-of-class in circle.cpp #include "shape.cpp" class Circle : public Shape { private: int radius; static const double PI = 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 2,04331243 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
using your existing account on the new forums, check out this thread. Register Help Remember Me? Forum Today's Posts FAQ Calendar Forum Actions Mark Forums Read Quick https://www.kirupa.com/forum/showthread.php?325258-help-on-Redefinition-of-class-but-the-only-definition Links View Forum Leaders What's New? Advanced Search Forum Development Other (Java, C, C++, etc.) C++: help on: Redefinition of class, but the only definition Results 1 to 4 of 4 Thread: help on: Redefinition of class, but the only definition Thread Tools Show Printable Version Subscribe to this Thread… Search Thread Advanced Search Display Linear Mode Switch to Hybrid Mode Switch to definition of Threaded Mode April 25th, 2009,10:30 PM #1 Sp˙rL View Profile View Forum Posts 56 posts Oro Nero help on: Redefinition of class, but the only definition Ive split the class into a seperate .h and .ccp for the implementation of things. I have the class definition in the .h and thats the only time I use the key word class as Im obviously creating a redefinition of c class. I coded these originally in notepad (lol), but since have run it through Dev-C++ (4.9.9.2). I fixed a majority of the errors that were bound to be in it, however I have this error that it keeps throwing at me during build-time saying: Code: line 13: redefintion of 'class Details' then below that error it has: Code: line 13: previous definition of 'class Details' as you can see.. the apparent redefinition is actually the original definition of the class. It also happens to be the only definition.. Can anyone explain whats going on here? If possible, can I get clarification on how to properly include the seperate .h and .ccp files and which files need #include statements and the #ifndef statements, as I dont think Im 100% on what should be where. Thanks guys. Reply With Quote April 27th, 2009,04:39 PM #2 actionAction View Profile View Forum Posts 1,142 posts humanBeing._beard=true; Your main file and your Details.cpp file should both include the Details.h file. In your Details.h, the class definition should be within this: Code: #ifndef DETAILS_H #define DETAILS_H //CLASS DEFINITION HERE #endif Make sure there is a semi-colon after the cl