一个由大象、猴子、长颈鹿、动物管理员、食物 售货员，参观者（大人、小孩）组成的虚拟动物园运行程序-This is a simulation of a very small zoo. The zoo only has 3 types of animals: 1 elephant, 2 giraffes and 3 monkeys. Each type of animal is housed in its own animal enclosure and each animal likes t