Compiler Error C2648

'identifier' : use of member as default parameter requires static member

The specified nonstatic member was used as a default parameter.

The following is an example of this error:

class C
{
public:
   int i;
   static int j;
   void func1( int i = i );  // error, i is not static
   void func2( int i = j );  // OK, uses static j
};