function IntToRoman(num: Cardinal): String; {returns num in capital roman digits}
const
 Nvals = 13;
 vals: array [1..Nvals] of word = (1, 4, 5, 9, 10, 40, 50, 90, 100, 400, 500, 900, 1000);
 roms: array [1..Nvals] of string[2] = ('I', 'IV', 'V', 'IX', 'X', 'XL', 'L', 'XC', 'C', 'CD', 'D', 'CM', 'M');
var
 b: 1..Nvals;
begin
 result := '';
 b := Nvals;
 while num > 0 do
 begin
  while vals[b] > num do
  dec(b);
  dec (num, vals[b]);
  result := result + roms[b]
 end;
end;