How to solve this two errors? friend_server.c:22:25: error: expected expression before ‘[’ token
   22 | int status = setsockopt([sock_fd], SOL_SOCKET, SO_REUSEADDR,
      |                         ^
friend_server.c:22:26: error: ‘sock_fd’ undeclared here (not in a function)
   22 | int status = setsockopt([sock_fd], SOL_SOCKET, SO_REUSEADDR,
