一个最简单的日历程序,输入年份和月份可以显示出日历,也可以显示全年的年份(注意:显示全年的日历不是一次全部显示,而是每次显示2个月的,多敲几下回车就OK了,呵呵)-One of the most simple calendar program, enter the month of the year and can show the calendar, but also can display a whole year (Note: The calendar shows the year is