Thread: error LNK2005: need help !

An error is prompt while compiling..

"error LNK2005: "class Controller input" (?input@@3VController@@A) already defined in Controller.obj"

Code:

// Class Control.cpp //

void Control::Controlling(void)
{
      inputs = 0;
      Controller input;
}

// Controller.cpp //

#define Controller

class Controller
{
  public:
      Controller(void);
      ~Controller(void);        
}input;

I am trying to call the input from class Controller in the function of class Control. Does my understanding for the programming was wrong?