屏幕时钟程序

(1)在屏幕上显示一个时钟，给成时钟的各元素均用字符拚出(2)显示在屏幕上的时钟大小不少屏幕面积的三分之一(3)能准确报时，并在正点或半点时给予提示(4)时钟的外观自定-Screen clock program (1) a clock displayed on the screen, giving all the elements into a clock with the characters spell (2) the clock on the screen one-third the size of a lot of screen area (3) accurate timekeeping, and give tips when punctuality or the slightest bit (4) the appearance of a custom clock