Undefined reference error C++

Question

i accessed a static function(funA()) in class A (all function in this class is static) but getting Undefined reference error. I included header

Please help.

// H file
Class A
{

 static void funA();
};

// Cpp file
void A::funA() {  }

Accessed in class B
void B::funB()
{
 A::funA()
}

Answer 1

Make sure you have something like this on your header:

// a.h
class A {
   static void funA();
};

// a.cpp
void
A::funA() {
    // do something on your function
}

Answer 2

从您的编辑看来，您似乎缺少public:在static void FunA() ..之前的部分，您是否只是忘了对其进行编辑，或者您的.cpp中确实缺少它？

Answer 3

如有必要，您是否包含正确的.lib文件？

Answer 4

使用前，您应始终在cpp文件中初始化静态函数和变量

Answer 5

您的代码中是否可能有双重声明，因为这会给您带来编译器错误。