Post Closed as "Duplicate" by mustaccio, Mateusz Grzejek, Captain Obvlious, bytecode77, πάντα ῥεῖ c++

Undefined reference to a static member of the class [duplicate]

occurred Aug 18, 2015 at 6:22

added 382 characters in body

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edited Aug 18, 2015 at 1:57

Mateusz Grzejek

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I have a code like this. When run, it's return fault : undefined reference to `A::x' A::x. How can iI fix this.?

http://cpp.sh/2flz

#include <iostream> using namespace std; class A { private: static int x; public: A(){ } A(int t) { x = t; } static void f() { cout<< A::x; } int f2() { return x; } }; int main() { A::f(); A a; a.f2(); }

I have a code like this. When run, it's return fault : undefined reference to `A::x' . How can i fix this.

http://cpp.sh/2flz

I have a code like this. When run, it's return fault: undefined reference to A::x. How can I fix this?

#include <iostream> using namespace std; class A { private: static int x; public: A(){ } A(int t) { x = t; } static void f() { cout<< A::x; } int f2() { return x; } }; int main() { A::f(); A a; a.f2(); }