The printk function relies on a feature of the C language called string literal concatenation.

printk 是基于 C 语言中一个名为字符串 逐字连接 的特性。

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Now, within the jni folder, create a file called native.c. Place the following C code in this file to start; we’ll add another function later

现在，在 jni 文件夹中，创建一个叫做 native.c 的文件。

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The marking code can be read out by using C language code with called back the interface function for the DS1991A.

并针对DS1991A器件，编写C语言代码调用接口函数，成功地读出了标识码。

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