LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;ENTITY h_adder IS PORT(a,b: IN STD_LOGIC; s,c: OUT STD_LOGIC);END ENTITY h_adder;ARCHITECTURE one OF h_adder ISsignal abc:std_logic_vector(1 downto 0);BEGINabc s

LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;ENTITY h_adder IS PORT(a,b: IN STD_LOGIC; s,c: OUT STD_LOGIC);END ENTITY h_adder;ARCHITECTURE one OF h_adder ISsignal abc:std_logic_vector(1 downto 0);BEGINabc s
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
ENTITY h_adder IS
PORT(a,b: IN STD_LOGIC;
s,c: OUT STD_LOGIC);
END ENTITY h_adder;
ARCHITECTURE one OF h_adder IS
signal abc:std_logic_vector(1 downto 0);
BEGIN
abc s

LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;ENTITY h_adder IS PORT(a,b: IN STD_LOGIC; s,c: OUT STD_LOGIC);END ENTITY h_adder;ARCHITECTURE one OF h_adder ISsignal abc:std_logic_vector(1 downto 0);BEGINabc s
我觉得可能是你的双引号“出问题了,换到英文输入法输进去试试看.

如图：