PLS-00103 error while creating package with overloading functions - oracle

Question

Please help in finding the error while creating the package with overloading functions.
Error shown:
PL-00103: Encountered the symbol "NUMOU"when expecting one of the following: language.
PL-00103: Encountered the symbol "Function" when expecting one of the following: end not pragma final instantiable order overriding static member constructor map.
code:
create or replace package over_load as
function print_it(numin varchar2) return number is numou number;
begin
numou := to_number(numin, '999,999.00');
dbms_output.put_line(numou);
return numou;
exception
when others then
dbms_output.put_line('Wrong string format');
return numou;
end;
function print_it(datin date) return varchar2 is datout varchar2(30);
dumcha varchar2(30);
dumdat date;
begin
dumcha := to_char(datin);
dumdat := to_date(dumcha,'FXDD-MON-YYYY');
datout := to_char(datin, 'fmMOn, DD YYYY');
dbms_output.put_line(datout);
return datout;
Exception
when others then
dbms_output.put_line('Wrong input date format');
return '0';
end;
end;

Answer 1

In Oracle RDBMS You MUST specify package (for public methods) and package body containing implementation for all public methods and optionally You can add some private methods.
Package specification:
create or replace package over_load as
function print_it(numin varchar2) return number;
function print_it(datin date) return varchar2;
end;
And body:
create or replace package body over_load as
function print_it(numin varchar2) return number is
numou number;
begin
numou := to_number(numin, '999,999.00');
dbms_output.put_line(numou);
return numou;
exception
when others then
dbms_output.put_line('Wrong string format');
return numou;
end;
function print_it(datin date) return varchar2 is
datout varchar2(30);
dumcha varchar2(30);
dumdat date;
begin
dumcha := to_char(datin);
dumdat := to_date(dumcha,'FXDD-MON-YYYY');
datout := to_char(datin, 'fmMOn, DD YYYY');
dbms_output.put_line(datout);
return datout;
exception
when others then
dbms_output.put_line('Wrong input date format');
return '0';
end;
end;
NOTE THAT:
To enable output from DBMS_OUTPUT in SQL*Plus You must enable serveroutput:
SQL> set serveroutput on size 30000;