Add while.

Signed-off-by: oooxff <oooxff@gmail.com>
Add add function to hello.c

Signed-off-by: oooxff <oooxff@gmail.com>
Merge branch 'merge_branch'
Add FIXME.

Signed-off-by: oooxff <oooxff@gmail.com>
Add sub.

Signed-off-by: oooxff <oooxff@gmail.com>