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Decimal To Roman Numeral Converter in Delphi

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Submitted on: 9/9/2016 10:58:49 AM
By: Jake R. Pomperada  
Level: Beginner
User Rating: Unrated
Compatibility: Delphi 6
Views: 2266
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     In this article I would like to share with you a sample program that I wrote using Delphi version 6 as my programming language that will ask the user to give a number and then our program will convert the given decimal number by our user into roman numerals. The code is very short and easy to understand in Delphi. Add me at Facebook my address is jakerpomperada@gmail.com and jakerpomperada@yahoo.com. My mobile number here in the Philippines is 09173084360.

 
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!**************************************
! Name: Decimal To Roman Numeral Converter in Delphi
! Description:In this article I would like to share with you a sample program that I wrote using Delphi version 6 as my programming language that will ask the user to give a number and then our program will convert the given decimal number by our user into roman numerals. 
The code is very short and easy to understand in Delphi.
Add me at Facebook my address is jakerpomperada@gmail.com and jakerpomperada@yahoo.com.
 
My mobile number here in the Philippines is 09173084360.
! By: Jake R. Pomperada
!**************************************

unit romans;
interface
uses
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
 Dialogs, StdCtrls;
type
 TForm1 = class(TForm)
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
Label4: TLabel;
Edit1: TEdit;
Button1: TButton;
Label5: TLabel;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
 private
{ Private declarations }
 public
{ Public declarations }
 end;
var
 Form1: TForm1;
implementation
{$R *.dfm}
function DecToRoman(Decimal: Longint): string;
const
 Numbers: array[1..13] of Integer =
(1, 4, 5, 9, 10, 40, 50, 90, 100,
400, 500, 900, 1000);
 Romans: array[1..13] of string =
('I', 'IV', 'V', 'IX', 'X', 'XL',
'L', 'XC', 'C', 'CD', 'D', 'CM', 'M');
var
 i: Integer;
begin
 Result := '';
 for i := 13 downto 1 do
while (Decimal >= Numbers[i]) do
begin
 Decimal := Decimal - Numbers[i];
 Result := Result + Romans[i];
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
 Label5.Caption:= 'The equivalent value of ' + Edit1.Text
 + ' to Roman Numberal is ' + DecToRoman(StrToInt(Edit1.Text))+'.';
 end;
procedure TForm1.Button2Click(Sender: TObject);
begin
Edit1.text :='';
Label5.Caption := '';
Edit1.SetFocus
end;
end.


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