根据不同的类可设置相应的构造函数、析构函数，以及设置、显示相关属性等相关行为。每个类至少定义4个成员函数。定义DOG类。（可设有年龄、体重、颜色等属性）-Depending on the category to set the corresponding constructor, destructor, as well as the settings, display properties and other related acts. The definition of each catego