进制数制是人们利用符号进行计数的科学方法。数制有很多种，在计算机中常用的数制有：十进制，二进制、八进制和十六进制。十六进制数有两个基本特点:它由十六个字符0～9以及A，B，C，D，E，F组成（它们分别表示十进制数0～15），十六进制数运算规律是逢十六进一，例如：十六进制数4AC8可写成（4AC8）16，或写成4AC8H。

要求：

-Binary number system is that people use scientific methods of counting symbols. There are a variety of number system, the number used in the computer system are: decimal, binary, octal and hexadecimal. Hexadecimal number has two basic characteristics: it consists of sixteen characters from 0 to 9 and A, B, C, D, E, F form (which represent the decimal number from 0 to 15), a hexadecimal number of operations Every law is a hexadecimal, for example: hexadecimal 4AC8 can be written (4AC8) 16, or written 4AC8H.

Requirements: