说明：  1、任务：设计一个能够识别IP地址类型的软件 2、功能要求：随意输入一个IP地址（十进制表示），要求能够输出该IP地址二进制表现形式，并能指出该地址属于A，B, C, D，E类中的哪一类。
(1, task: to design an IP address can identify the 2 types of software, functional requirements: Enter a random IP address (decimal), the requirements be able to output the IP address of the binary form of expression, and that the addresses belong to A, B, C, D, E category in which category.)