说明：  程序功能: 实现一个万年历，当用户指定某年某月时，应当像、编日历格式一样显示该月所有日子。要求重大节日、双休日突出显示。 开发环境: 程序用C语言编制,编译工具为GCC,在DEVC++4.9.9.0下开发,操作系统为WindowsXP。
(Program features: realization of a calendar, when the user specified a certain period of time, it should be, like, made the same calendar format shows all days of the month. Requirements of the major festivals, weekend highlights. Development Environment: The procedure using C language, compiler tools for GCC, in DEVC++ 4.9.9.0 under development, operating system WindowsXP.)