最后，我们需要在头文件的“private：”部分中添加一个变量。

Finally, we need to add a single variable to the 'private:' section of the header file. This is the object that will handle the external executable (FFMPEG) from within qt.

youdao

部分Spirit框架在内部使用来自Boost的正则表达式库，在已安装的代码库中检查regex . h头文件。

Part of the Spirit framework internally USES the regular-expression library from Boost. After installation, check for the regex.h.

youdao

绝大部分情况下，没有理由去测试是否有权使用自 1989 版本标准出现以后的 ANSI/ISO C 中的函数或者标准的 C 头文件是否可用。

In most cases, there is no reason to test for access to functions that have been part of ANSI/ISO C since the 1989 version of the standard came out, or for availability of the standard C headers.

youdao