说明：  C语言编写的时钟源程序(上机通过的),可以显示时钟,而且有不同的显示方式,既能按机械表行走，又能按电子表显示时间和日期
(C language clock source (on the plane), it shows the clock, but there are different methods, both by mechanical table walking, but also by electronic table shows the time and date! !)