use include-what-you-use

[xingwozhonghua126]

No description provided.

[wengxt]

Please fix.

Also there are some obvious error, like "getopt.h" is removed, but there's nothing added as a replacement.
man 3 getopt says unistd.h should be used for getopt()

[xingwozhonghua126]

Please fix.

Also there are some obvious error, like "getopt.h" is removed, but there's nothing added as a replacement. man 3 getopt says unistd.h should be used for getopt()

done