BEGIN CASE C工s WHEN0=>AB<="0000"; WHEN1=>AB<="0001"; WHEN2=>AB<="0010"; WHEN3=>AB<="0011"; WHEN4=>AB<="0100 WHEN5=>AB<="0101"; WHEN6=>AB<="0110"; WHEN7=>AB<="0111"; WHEN8=>AB<="1000"; WHEN OTHERS=> NUlLi END CASE; END PROCESSi END AiBEGIN CASE Q IS WHEN 0=> AB<="0000"; WHEN 1=> AB<="0001"; WHEN 2=> AB<="0010"; WHEN 3=> AB<="0011"; WHEN 4=> AB<="0100"; WHEN 5=> AB<="0101"; WHEN 6=> AB<="0110"; WHEN 7=> AB<="0111"; WHEN 8=> AB<="1000"; WHEN OTHERS=> NULL; END CASE; END PROCESS; END A;