library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

entity comparator is 
    port(A, B: in  std_logic_vector (3 downto 0);
         C, D: out std_logic_vector (3 downto 0)
    );
end comparator;

architecture behavorial of comparator is
begin
    process(A,B)
    begin
    	if A > B then
		C<=B;
    		D<=A;
	else
		C<=A;
		D<=B;    
        end if;
    end process;
end behavorial;