设计一个10进制同步计数器，带一个清零端，一个进位输出端。（如果改成六进制，应该如何修改程序）

　　计数器分为同步计数器和异步计数器两种，是典型的时序电路，分析计数器就能更好的了解时序电路的特性。所谓同步计数器，就是在时钟脉冲的控制下，构成计数器的各触发器同时发生变化的那一类计数器。异步计数器又称行波计数器，它的下一位计数器的输出作为上一位计数器的时钟信号，这样一级一级串接起来就构成了一个异步计数器。异步计数器与同步计数器不同之处就在于时钟脉冲的提供方式，但是，由于异步计数器采用行波计数，从而使计数延迟增加，在要求延迟小的领域受到了很大的限制。尽管如此，由于它的电路简单，仍有广泛的应用。

　　输入：逻辑开关，单脉冲按钮。输出：LED灯。-Design of a 10-N synchronous counter, with a clear end, a carry output. (If you change the hex, it should be as

Any amendment to the procedure)

Divided into synchronous and asynchronous counter counter counter two, is a typical sequential circuit, analysis of the counter can better understand

Timing characteristics of the circuit. The so-called synchronous counter, that is, under the control of the clock pulse, the counter triggers the same time constitute a change

The kind of counter. Asynchronous counter, also known as traveling wave counter, it s next on the counter output as a counter clock signal

No, this one a tandem together to form an asynchronous counter. Asynchronous counter and synchronous counter difference is that the clock

Pulse mode of delivery, but because of the asynchronous counter using wave count, so count delayed increase in the required areas of the small delay

Has been greatly restricted. However, because of its simple circuit, there are still widel