说明：  万年历查询程序。 提供菜单方式选择输入年份、月份、日期，计算得到的这一天据今天有多少天，星期几；输入公历的年月日，输出农历年月日；输入农历节气，输出当年农历的年月日及公历年月日。可以假定只涉及年份是1940年到2040年。
(Calendar query process. Menu to select the input mode to provide the year, month, date, calculated according to this day how many days today, the week enter calendar year, month, day, year, month date of the Lunar output enter lunar solar terms, the output current year, month, day and lunar Day calendar years. Can be assumed that only involve the year 1940 to 2040.)