Error Undefined Reference To Static Variable
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Undefined Reference To Static Variable C++
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Undefined Reference To Static Member Function C++
only takes a minute: Sign up Undefined reference to static variable c++ up vote 28 down vote favorite 4 Hi i am getting undefined reference error in the following code: class Helloworld{ public: static int x; void foo(); }; void Helloworld::foo(){ Helloworld::x = 10; }; I don't want a static foo() function. How can I access static variable of a
Undefined Reference To Private Static Variable
class in non-static method of a class? c++ static share|improve this question edited Nov 26 '15 at 13:45 BaCaRoZzo 4,25962036 asked Apr 29 '13 at 17:23 Nevermore 3071413 1 It would be good to accept an answer. –Geoff Feb 3 at 18:10 add a comment| 2 Answers 2 active oldest votes up vote 45 down vote I don't want a static foo() function Well, foo() is not static in your class, and you do not need to make it static in order to access static variables of your class. What you need to do is simply to provide a definition for your static member variable: class Helloworld { public: static int x; void foo(); }; int Helloworld::x = 0; // Or whatever is the most appropriate value // for initializing x. Notice, that the // initializer is not required: if absent, // x will be zero-initialized. void Helloworld::foo() { Helloworld::x = 10; }; share|improve this answer edited Jun 2 at 7:49 answered Apr 29 '13 at 17:25 Andy Prowl 81.6k12240339 1 thanks a lot man. I
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Multiple Definition Of Static Variable C++
Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of c++ undefined reference to static vector 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Undefined reference to static variable and static method up vote 0 down vote favorite #include
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 http://stackoverflow.com/questions/9282354/static-variable-link-error hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges http://stackoverflow.com/questions/9110487/undefined-reference-to-a-static-member 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 static variable link error [duplicate] up vote 31 down vote favorite 1 This question already has an answer here: What is an undefined reference/unresolved external symbol error and how undefined reference do I fix it? 25 answers I'm writing C++ code on a mac. Why do I get this error when compiling?: Undefined symbols for architecture i386: "Log::theString", referenced from: Log::method(std::string) in libTest.a(Log.o) ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation) Not sure if my code is wrong or I have to add additional flags to Xcode. My current XCode configurations are the default ones for undefined reference to a 'static library' project. My code: Log.h------------ #include
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 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 Undefined reference to a static member up vote 19 down vote favorite 5 I'm using a cross compiler. My code is: class WindowsTimer{ public: WindowsTimer(){ _frequency.QuadPart = 0ull; } private: static LARGE_INTEGER _frequency; }; I get the following error: undefined reference to `WindowsTimer::_frequency' I also tried to change it to LARGE_INTEGER _frequency.QuadPart = 0ull; or static LARGE_INTEGER _frequency.QuadPart = 0ull; but I'm still getting errors. anyone knows why? c++ undefined-reference cross-compiling share|improve this question edited Aug 9 at 12:37 Rakitić 2,71351230 asked Feb 2 '12 at 10:12 kakush 67142246 possible duplicate of undefined reference for static member, linker error –iammilind Feb 2 '12 at 10:15 Where (if anywhere) have you defined WindowsTimer::_frequency? –Charles Bailey Feb 2 '12 at 10:16 @CharlesBailey It my only member in the class. –kakush Feb 2 '12 at 10:35 add a comment| 3 Answers 3 active oldest votes up vote 34 down vote You need to define _frequency in the .cpp file. i.e. LARGE_INTEGER WindowsTimer::_frequency; share|improve this answer answered Feb 2 '12 at 10:15 Ed Heal 37.1k94591 thank you very much. –kakush Feb 2 '12 at 13:38 add a comment| up vote 11 down vote Linker doesn't know where to allocate data for _frequency and you have to tell it manually. You can achieve this by simple adding this line: LARGE_INTEGER WindowsTimer::_frequency = 0; into one of your C++ sources. More detailed explanation here share|improve this answer answered Feb 2 '12 at 10:16 Vyktor 13.8k22467 add a comment| up vote 6 down vote If there is a static variable declared ins