本段代码实现c2.0模拟时钟程序，

说实话，第一次见到这样的程序时看见老师编的，

可惜老师没给源程序，

现在我写出来献给大家，供热爱C的朋友学习参考-source implementation of the simulation clock c2.0 procedures, telling the truth, the first time I see such a procedure when teachers see the series, but the teacher did not give the source, I was dedicated to everyone out for the C-loving friends study reference.