0001 template <typename K, typename V> struct Dictionary { //词典Dictionary模板类
0002    virtual Rank size() const = 0; //当前词条总数
0003    virtual bool put( K, V ) = 0; //插入词条
0004    virtual V* get( K k ) = 0; //读取词条
0005    virtual bool remove( K k ) = 0; //删除词条
0006 };