Anne的宠物小屋有12个笼子,每个笼子可以放不同的动物,但只能放1只或0只,包括猫Cat,狗Dog,蛇Snake. (1),实现一个简单的管理系统,可增加、删除笼子中的宠物,查询每个笼子中存放的宠物类型,(包括笼子为空的情况),统计笼中宠物的种类和数量.-Anne cottages are pet cages 12, each cage can be put in different animals, but only put one or 0, including the cat Cat, Dog Dog, Snake Snake. (1), the realization of a simple management system can be increase in the deletion of the pet cage, cage for each query in the pet store types, (including the case of an empty cage), Statistics cage type and quantity of pets.