数字逻辑课程设计，基于EWB软件设计一个数字电子时钟，要求能实现十二进制和二十四禁止的转换，有秒时分的显示，用74160实现的-Digital logic design, EWB-based software to design a digital electronic clock, the requirements to achieve 10 and 24 the prohibition of binary conversion, the second night of the show, w