Revert "Update hello.c"

This reverts commit ebf84dc47983c139315e8325aa40cdb58b8d0a09.
Revert "Revert "Update hello.c""

This reverts commit fa591cc922317ffa273960da93cd07ed9debf38c.
Revert "Revert "Revert "Update hello.c"""

This reverts commit c51e687547d404ca25323ab4aa00b8fb9c078701.
Revert "Revert "Revert "Revert "Update hello.c""""

This reverts commit 59565485b85f0521aa153fe1e1f460a6f3b12df5.