Static member functions in namesapce

I have static member function inside my class which I would like to add in my namespace.

class A{
public:
    static void func();
};

namespace myNamespace{
    void A::func(){
    ...
    }
}

int main(){
   myNamespace::A::func;
}

I get the following errors:

• error: definition of ‘void A::func()’ is not in namespace enclosing ‘A’ [-fpermissive]
• error: ‘myNamespace::A’ has not been declared myNamespace::A::func(); void A::func(){

what is the reason?

because you put a function that belongs to the class A inside namespace. just make the class and function A together inside namespace your code should be like this

namespace myNamespace {
class A {
public:
    static void func();
};


    void A::func() {

    }
}
int main()
{

    myNamespace::A::func;

    return 0;
}