public void printVegetarianMenu()
{
IEnumerator enumerator = allMenus.createIEnumerator();
while (enumerator.MoveNext())
{
MenuComponent menuCompent = (MenuComponent)enumerator.Current;
if (menuCompent != null && menuCompent.isVegetarian())
{
menuCompent.print();
}
}
}
//这种print的方式是内部迭代，不断地通过子类枚举遍历
public override void print()
{
Console.Write("\n" + getName());
Console.WriteLine("," + getDescription());
Console.WriteLine("------------");
IEnumerator enumerator = menuComponents.GetEnumerator();
while (enumerator.MoveNext())
{
MenuComponent component = (MenuComponent)enumerator.Current;
component.print();
}
/*
* foreach(var item in menuComponents)
* {
* ((MenuComponent)item).print();
* }
*/
}
public void print()
{
allMenus.print();
}