/* -*- C++ -*- */ // KeyType.h,v 1.1 2004/01/01 21:01:00 shuston Exp #ifndef __KEYTYPE_H_ #define __KEYTYPE_H_ // Listing 1 code/ch05 class KeyType { public: friend bool operator == (const KeyType&, const KeyType&); KeyType () : val_(0) {} KeyType (int i) : val_(i) {} KeyType (const KeyType& kt) { this->val_ = kt.val_; }; operator int() const { return val_; }; private: int val_; }; bool operator == (const KeyType& a, const KeyType& b) { return (a.val_ == b.val_); } // Listing 1 #endif /* __KEYTYPE_H_ */