library ieee;
use ieee.std_logic_1164.all;

entity concept2_1 is
    port (con, data_in : in  std_logic;
          data_out     : out std_logic);
end concept2_1;

architecture JMJS_Logic of concept2_1 is
begin
    process(con, data_in)
    begin
        data_out <= '0';
        if(con = '1') then
	    data_out <= data_in;
	end if;
    end process;
end JMJS_Logic;