物理：component vector 和 component 区别？

原文：Then we can express the relationship between component vectors and components,…

一定有什么不同吧，各位大神，拜谢！

components 在我们书上的解释是the horizontal and vertical parts that add up to give the actual displacement……剩下的不清楚了，我也不知道……

entity controlis 改为entity control is 少个空格 architecture a of control is 也少个空格 use ieee.std_logic_1164.all; use iese.std_logic_unsigned.all; signal t:integer;--都是少空格 library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity control is port( clk:in std_logic; s:out std_logic_vector(2 downto 0); loadat,loadbt:out std_logic; at,bt:out integer range 0 to 80); end control; architecture a of control is signal t:integer; begin process(clk) begin if clk'event and clk='1' then loadat<='0';loadbt<='0'; if t=0 then s<="000"; at<=80; loadat<='1'; elsif t=15 then s<="001"; bt<=45; loadbt<='1'; elsif t=60 then s<="010"; elsif t=65 then s<="011"; bt<=80; loadbt<='1'; elsif t=80 then s<="100"; at<=45; loadat<='1'; elsif t=125 then s<="101"; end if; t<=t+1; end if; if t=130 then t<=0; end if; end process; end a;

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