SET VERIFY OFF
ACCEPT sys_pass PROMPT 'Please enter password for user SYSTEM : ' hide
ACCEPT db_name PROMPT 'Enter database name or connection string. Default is [LOCAL] : '
REM CONNECT
CONNECT SYSTEM/&sys_pass@&db_name
ACCEPT u_name PROMPT 'Enter user name: '
DROP USER &u_name CASCADE;
EXIT;
WHENEVER SQLERROR EXIT