C++设计模式之迭代器模式（Iterator）

class Item
{
public:
  Item(string strName,float price):
  m_name(strName),m_price(price){}
  Item(Item& item):
  m_name(item.strName),m_price(item.price){}
    string tostring()
  {
    std::ostringstream buffer;
    buffer <=0 && curpossize()) 
  } 
  virtual Item* current() 
  {
    return m_menu->value(curpos); 
  }
}; 


class Menu : public Container
{
public:
  virtual ~Menu() 
  {
    for(int i=0 ; i=0 && nIndex m_items; 
};


int main()
{
  Item it1("chicken", 10.0);
    Item it2("Apple", 5.0);
    Item it3("Beaf", 20.0);
    Item it4("soup",15.0);
    
    Menu menu;
  menu.additem(it1);
  menu.additem(it2);
  menu.additem(it3);
  menu.additem(it4);
  
    Iterator itor = menu.CreateIterator();
  while(itor->hasnext())
  {
    Item* pItem = itor->current();
    if(pItem)
      cout<tostring()<next();
  }
}