operator overloding bug

Can you help me with this nasty bug please?

stonewt.cpp:128: no `class Stonewt Stonewt::operator +(const Stonewt &) const' member function declared in class `Stonewt'

Code:

---

Stonewt Stonewt::operator+(const Stonewt & b) const
{
    switch (mode)
    {     
          case 'i' : return Stonewt(ipounds+b.ipounds);
                    break;
          case 'p' : return Stonewt(pounds+b.pounds,'p');
                    break;
          case 's' : return Stonewt(stone+b.stone,pds_left+b.pds_left);     
                    break;
                           
      }
}

---

It's not a bug, it's a syntax error :).
Anyway, it seems like you've forgotten to declare the function (method) in your class prototype.

Code:

---

class Stonewt
{
  public:
      Stonewt Stonewt::operator+(const Stonewt & b) const;

  ...

};

---