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