C++ include guards and multiple definition errors
c++,header-files,redefinition,include-guards
There are multiple definition errors because stack.cpp does: stack<int> s; and main.cpp also defines a stack: stack<int> s; You have two different global objects defined with the same name which causes undefined behaviour (luckily your linker diagnoses it). Instead, what you probably intended to do was to have a single...
Class redefinition c++ [duplicate]
I need to see your code to completely understand where the error might be, but you could try this: In the header: extern A* aClass; In the main.cc, before the main function: A* aClass; and inside the main function: int main() { ... aClass = new A(); ... } Hopefully...
Codeblocks int main previously defined here
You include main.cpp in the header file as well, causing the function main to be defined twice. Remember that using #include is basically copying and pasting the whole file in there. #include "main.cpp" // "paste" the complete contents of the included file What happens is that in the cpp file,...
Redefined variable in the other module
c++,variables,module,redefinition
In function main variable i is a local variable of the function. It is not visible and exists outside the function. Consider the following example #include <iostream> int i = 3; int main() { int i = 10 std::cout << "i = " << i << std::endl; std::cout << "::i...
multiple header files redefinition error in C
You can't redefine the same symbol in two different header files and include them together, you will have the redefinition of 'xxx' error you can see. What you can do about that is either remove the typedef struct node from one of the files, or even better, move your struct...
C - redefinition error in Xcode
c,xcode,header-files,redefinition
entry was originally reserved as a keyword and then later declared obsolete. So older compilers don't allow it (see this question). Change the name of the struct and everything should be fine.
enable_if in template Parameters Creates Template Redefinition Error
c++,templates,typename,redefinition,enable-if
It seems that the best solution here may be to use a slew of conditionals, which would prevent me from having to fool with template specializations: template <typename T, typename R = std::conditional<sizeof(T) == sizeof(unsigned char), unsigned char, conditional<sizeof(T) == sizeof(unsigned short), unsigned short, conditional<sizeof(T) == sizeof(unsigned long), unsigned long,...
Usage of enum name as value identifier in Objective-C
objective-c,enums,namespaces,declaration,redefinition
Objective-C is C. An enum is a C enum. And there is no namespacing. That is exactly why the convention is to name the enumerations AnEnumAnyValue and AnotherEnumAnyValue. You'll find that all Cocoa enumerations work that way: typedef enum { UIViewAnimationTransitionNone, UIViewAnimationTransitionFlipFromLeft, UIViewAnimationTransitionFlipFromRight, UIViewAnimationTransitionCurlUp, UIViewAnimationTransitionCurlDown, } UIViewAnimationTransition; If you want...
C++, Class redefinition [duplicate]
Most probably you are getting this error because your header file included more than once from the same compilation units. You should use include guards in your headers as explained here http://en.wikipedia.org/wiki/Include_guard
Redefinition using Constructor
Witaj Przemeku Na StackOverflow! How about this?: class Base { protected: int *value; public: Base() { value = new int, *value = 1; }; Base(int &n) { value = new int[n]; }; }; int main() { int x; x = 2; Base base; base = Base(x); <--- fix return...