一道简单的C语言题，把代码完整写出来行吗，急，谢谢

Library ieee;
Use ieee.std_logic_1164.all;
Use ieee.std_logic_arith.all;
Use ieee.std_logic_unsigned.all;
Entity watch is
Port(sel: out std_logic_vector(6 downto 1) ;
seg:out std_lo