缺省情况下，文件结束字符串是下划线(_)；如果将该字符作为单个输入参数来发送，则它之后的所有内容将被忽略。

By default, the end-of-file string is an underscore (_); if that character is sent as a single input argument, everything after it is ignored.

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记号赋予器穿过输入流，每次检查一个字符，直到它遇到一个整数或者直至文件结束。

The tokenizer moves through the stream, inspecting characters one at a time until it encounters either an integer or the end of file.

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另外，您还可以利用更复杂的分隔技术，使用消息解析器确定输入文件的记录的结束。

Alternatively you can use a more complex delimiting technique which is to use a message parser to determine the end of a record from an input file.

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