I have just installed VC++2005 Express Ed. and I keep getting a LNK2001
error:unresolved external symbol "public: virtual void __thiscall
Circle::draw(void)const " (?draw@Circle@@UBEXXZ)
when building the following code:

class Coord {
 private:
   int x, y;
 public:
   Coord (int i1, int i2) : x(i1), y(i2) {}
};
class GeoObj {
 public:
   // draw geometric object:
   virtual void draw() const = 0;
};

// concrete geometric object class Circle
// - derived from GeoObj
class Circle : public GeoObj {
 public:
   virtual void draw() const;
};

// draw any GeoObj
void myDraw (GeoObj & obj)
{
   obj.draw();            // call draw() according to type of object
}

int main()
{
   Circle c;
   myDraw(c);            // myDraw(GeoObj&) => Circle::draw()
   return 0;
}

Thanks
Eugene
I did unsuccessfully try all the prescribed remedies. Any ideas?