设计一个日历程序，程序运行时提示用户输入年月日，回车后显示该日期的英文格式，并输出该日在全年的第几天，最后打印出该年的日历（格式与普通日历相同）。-Design a calendar program, the program is running, the user is prompted for the month, day, Enter the date in English format and output the day in the year a few days, and finally print out the calendar of the year (in the form and the same as the ordinary calendar).