The last line also finishes with a comment,and this one indicates the end of the source code listing,which allows it to be automatically extracted from the text of this book and checked with a compiler.

• 最后一行也用这样的一条注释结尾，它标志着源代码清单的结束。这样一来，可将代码从本书的正文中方便地提取出来，并用一个编译器检查。