CHEM=$BDA/format

echo ' '
case $# in
1) echo 'Format  '$1: ;;
2) echo 'Format  '$2: ;;
esac
echo ' '

case $1 in
-f) zex $CHEM/form_f.$2 ;;
-c) zex $CHEM/form_c.$2 ;;
*)  zex $CHEM/form.$1 ;;
esac
echo ' '