(* Teresa Tong F.4AS [30]    March,2002 *)
(* Write a program with a procedure RoomCharge to compute
   the total charge for a hospital room                   *)

program HospitalRoom;
uses wincrt;
var day:integer;
    room:char;
    sum:integer;

procedure RoomCharge(day:integer;
                     room:char;
                     var total:integer);
begin
  If room='A'
  then total:=1000*day;
  If room='B'
  then total:=500*day;
  If room='C'
  then total:=100*day; 
end;




begin
  sum:=0;
  writeln('  Room type     code    Daily rate($)');
  writeln(' first class     A        1000');
  writeln(' second class    B         500');
  writeln('    ward         C         100');
  writeln;
  writeln('What room would you like ( A, B or C )? ');
  readln(room);

  If ( room='A' ) or ( room='B' ) or ( room='C' )

    then begin
         Writeln('How many days would you like to stay? ');
         readln(day);

         RoomCharge( day, room, sum);
         writeln('Total charge is $',sum);
         end


    else begin
         repeat
         writeln('No such room. Please enter again. ' );
         readln(room);
         until ( room='A' ) or ( room='B' ) or ( room='C' );

         Writeln('How many days would you like to stay? ');
         readln(day);

         RoomCharge( day, room, sum);
         writeln('Total charge is $',sum);
         end

end.

=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
Output:

1)  Room type      code     Daily rate($)
   first class      A         1000
   second class     B          500
      ward          C          100

  What room would you like ( A, B or C)?
  A
  how many days would you like to stay?
  10
  Total charge is $10000

2)  Room type      code     Daily rate($)
   first class      A         1000
   second class     B          500
      ward          C          100

  What room would you like ( A, B or C)?
  D
  No such room. Please enter again.
  C
  How many days would you like to stay?
  5
  Total charge is $500