这些程序我用MAX+PlusII软件测试均能通过编译，程序本身不复杂，旨在为刚接触VHDL语言的朋友提供一些样例，以便了解VHDL语言的基本构成。如果要运行测试，则新建文件名应于程序中实体名一致，文件后缀“.vhd”，不推荐直接通过复制、粘贴的方法录入程序，可能会引入错误字符。 -these procedures I used MAX PlusII Software Testing pass compiler, the process itself is not complicated. for the fourth year to VHDL friend to provide some examples in order to understand the VHDL basic components. If testing, the new file name in the process should be entity line extensions. " Vhd " not recommended directly by copying and pasting the time of admission procedures, the potential introduction of the wrong characters.