C1802: Must be static member

[ERROR]

A non-static member has been accessed inside a static member function.

  struct A {

  

    static void f();

  

    int i;

  

  };

  

  void A::f() {

  

    i=3;  // error

  

  }

  

Remove the static specifier from the member function, or declare the member to be accessed as static.