万年历查询程序。

功能要求：

（1）提供菜：单方式选择

（2）输入年份、月份、日期，计算得到的是这一天据今天有多少天，星期几

-Calendar query process. Functional requirements: (1) food: One way to select (2) Enter the year, month, date, calculated according to today is the day the number of days of the week