一个配置文件(称为hats宏)定义主机应用程序屏幕必需的数据。

A configuration file (called a HATS macro) defines the data that is required from the screens of the host application.

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首先创建一个业务逻辑，当您通过宏从大型机应用程序收集所有必要的数据时，这个业务逻辑会被触发。

Start by creating the business logic that gets triggered when you collect all the necessary data from the mainframe application through macros.

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Flex具有一个非常有用的宏yy_input，它负责为符号解释读入数据。

Flex has the useful macro YY_INPUT, which reads data for token interpretation.

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