Learn Delphi 1(record and function)

program Project2;
{$APPTYPE CONSOLE}
uses SysUtils;
type weekname = record
                chname:string;
                enname:string;
                end;
const
        chnamearray: array[1..7]of string =('c1','c2','c3','c4','c5','c6','c7');
        ennamearray: array[1..7]of string =('1e','e2','e3','e4','e5','e6','e7');

        testarray: array[1..7] of weekname = (
                                                (chname:'c1'; enname:'e1'),
                                                (chname:'c2'; enname:'e2'),
                                                (chname:'c3'; enname:'e3'),
                                                (chname:'c4'; enname:'e4'),
                                                (chname:'c5'; enname:'e5'),
                                                (chname:'c6'; enname:'e6'),
                                                (chname:'c7'; enname:'e7')
                                                );
  var
        total:integer;
        weeknum:integer;
        wk: weekname;

  function Factorial(num: integer) :integer ;
  var temp:integer;
  begin
        if(num=0) or (num=1)    then
                temp:=1
        else
                temp:= Factorial(num-1) * num;

        result := temp;
  end;

  function  ShowWeek(n:integer):weekname;

  begin
         result := testarray[n+1];
  end;

begin

  total := Factorial(4) +  Factorial(6) + Factorial(9);
  writeln('4!+6!+9! :', total);
  readln;
  read(weeknum);
  wk :=   testarray[weeknum+1];
  writeln('ch name : ', wk.chname);
  writeln('en name : ', wk.enname);
  readln;
  readln;
end.