After installing Oracle 12C database, Scott account expires, unlock method

Use Windows Console (program | run, enter CMD to open). Under command line, enter Sqlplus/nolog, carriage return, the sql> command prompt appears, and then enter the command in the following order:

Sql>conn/as SYSDBA
Sql>alter user Scott account unlock;
Sql>disconnect
Sql>conn Scott/tiger;
The password is now expired, please enter a new password. Then enter two new defined passwords to enter the password separately to confirm that the Scott account is given a new password. Open SQL Plus and log in with your Scott account.

After installing Oracle 12C database, Scott account expires, unlock method