eee.std_logic_arith.all use ieee.std_logic_1164.all use ieee.std_logic_unsigned.all entity PL_auto1 is port ( clk:in std_logic --系统时钟 set,get,sel,finish: in std_logic --设定、买、选择、完成信号 coin0,coin1: in std_logic --5角硬币、1元硬币 price,quan