Please help with this array!

[DutchBird]

I have to make a project, in wich I have to convert Roman numbers (e.g. XIV) into "normal" numbers (e.g. 1,2,3). An array should cover it, but I really can't find out how it works.
Please Help Me!


ps
Maybe you can help me with the code?

Thanks everybody, It worked! Here is the code:
(some is in Dutch, but you'll get the genaral idea)

'Declarations Roman Numbers

Dim RomijnArray(10) As String
Dim RomLetter As String
Dim Romijnsstring As String

'delaraties arab cijfers
Dim ArabLetter1 As Integer
Dim ArabLetter2 As Integer

Dim ArabArray(10) As Integer


'declaraties totaal
Dim alles As Integer



Romijnsstring = UCase(txtRomeinsveld.Text)

l = Len(Romijnsstring)
alles = 0

For i = 1 To l
RomijnArray(i) = Mid(Romijnsstring, i, 1)
Next

For i = 1 To l
RomLetter = RomijnArray(i)
If RomLetter = "I" Then
ArabArray(i) = 1
ElseIf RomLetter = "V" Then
ArabArray(i) = 5
ElseIf RomLetter = "X" Then
ArabArray(i) = 10
ElseIf RomLetter = "L" Then
ArabArray(i) = 50
ElseIf RomLetter = "C" Then
ArabArray(i) = 100
ElseIf RomLetter = "D" Then
ArabArray(i) = 500
ElseIf RomLetter = "M" Then
ArabArray(i) = 1000
Else
MsgBox "Wrong number", vbExclamation
Exit Sub
End If
Next

For i = 1 To l
ArabLetter1 = ArabArray(i)
ArabLetter2 = ArabArray(i + 1)


If ArabLetter1 < ArabLetter2 Then
alles = alles - ArabLetter1
ElseIf ArabLetter1 > ArabLetter2 Or ArabLetter1 = ArabLetter2 Then
alles = alles + ArabLetter1
Else
MsgBox "Wrong Number", vbExclamation
Exit Sub
End If
Next

txtArabischveld.Text = alles

End Sub

[peet]

http://www.vbforums.com/showthread.p...=Roman+numbers

[champgary]

Originally posted by DutchBird
I have to make a project, in wich I have to convert Roman numbers (e.g. XIV) into "normal" numbers (e.g. 1,2,3). An array should cover it, but I really can't find out how it works.
Please Help Me!


ps
Maybe you can help me with the code?

Are you sure you really need array,
Can you explain me some...or
I can help you
Gary

[champgary]

peet this is really cool

[plenderj]

I had to do this in my computer science class last year.
May be of use to you

public class convert
{
	public static void main (String[] args)
	{		

		int userInput;
		System.out.print("Please enter a number to convert : ");
                userInput = TextIO.getInt();
		if ((userInput > 3999) || (userInput < 0))
		{
			System.out.println("Can only convert numbers between 0 and 3999");
		}
		if ((Integer.toString(userInput).length() > 0) && (Integer.toString(userInput).length() < 5))
		{
			System.out.println(converter(userInput));
		}

	}
	
	public static String converter(int int_number) {
		String to_return = "";
		if (Integer.toString(int_number).length() == 1)
		{
			to_return = onesToRomanNumerals(int_number);
		}
		else if (Integer.toString(int_number).length() == 2) 
		{
			to_return = tensToRomanNumerals(int_number);
		}
		else if (Integer.toString(int_number).length() == 3)
		{	
			to_return = hunsToRomanNumerals(int_number);
		}
		else if (Integer.toString(int_number).length() == 4)
		{
			to_return = thousandsToRomanNumerals(int_number);
		}

		return to_return;
	}
	
	public static String thousandsToRomanNumerals(int int_number) {
		String var_temp = Integer.toString(int_number);
		String var_huns = var_temp.substring(var_temp.length() - 3);
		String var_thou = var_temp.substring(var_temp.length() - 4, var_temp.length() - 3);
		String to_return = "";

		switch (Integer.parseInt(var_thou)) {
			case 0:   to_return = hunsToRomanNumerals(Integer.parseInt(var_huns));
				  break;
			case 1:   to_return = "M" + hunsToRomanNumerals(Integer.parseInt(var_huns));
				  break;
			case 2:   to_return = "MM" + hunsToRomanNumerals(Integer.parseInt(var_huns));
				  break;
			case 3:   to_return = "MMM" + hunsToRomanNumerals(Integer.parseInt(var_huns));
				  break;
		}
		return to_return;
	}
	public static String hunsToRomanNumerals(int int_number) {
		String var_temp = Integer.toString(int_number);
		String var_tens = "", var_huns = "";
		if (Integer.toString(int_number).length() == 3)
		{	
			var_tens = var_temp.substring(var_temp.length() - 2);
			var_huns = var_temp.substring(var_temp.length() - 3, var_temp.length() - 2);
		}
		else if (Integer.toString(int_number).length() == 2)
		{	
			var_tens = var_temp.substring(var_temp.length() - 2);
			var_huns = "0";
		}
		else if (Integer.toString(int_number).length() == 1)
		{	
			var_tens = "0";
			var_huns = "0";
		}
		String to_return = "";

		switch (Integer.parseInt(var_huns)) {
			case 0:   to_return = tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
			case 1:   to_return = "C"  + tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
			case 2:   to_return = "CC"  + tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
			case 3:   to_return = "CCC"  + tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
			case 4:   to_return = "CD"  + tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
			case 5:   to_return = "D"  + tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
			case 6:   to_return = "DC"  + tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
			case 7:   to_return = "DCC"  + tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
			case 8:   to_return = "DCCC"  + tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
			case 9:   to_return = "CM"  + tensToRomanNumerals(Integer.parseInt(var_tens));
				  break;
		}
		return to_return;
	}

	public static String tensToRomanNumerals(int int_number) {
		
		String var_temp = Integer.toString(int_number);
		String var_ones = "", var_tens = "";
		if (Integer.toString(int_number).length() == 1)
		{
			var_ones = Integer.toString(int_number);
			var_tens = "0";
		}
		else if (Integer.toString(int_number).length() == 2)
		{
			var_ones = var_temp.substring(var_temp.length() - 1);
			var_tens = var_temp.substring(var_temp.length() - 2, var_temp.length() - 1);
		}

		String to_return = "";

		switch (Integer.parseInt(var_tens)) {
			case 0:   to_return = onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
			case 1:   to_return = "X"  + onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
			case 2:   to_return = "XX"  + onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
			case 3:   to_return = "XXX"  + onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
			case 4:   to_return = "XL"  + onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
			case 5:   to_return = "L"  + onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
			case 6:   to_return = "LX"  + onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
			case 7:   to_return = "LXX"  + onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
			case 8:   to_return = "LXXX"  + onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
			case 9:   to_return = "XC"  + onesToRomanNumerals(Integer.parseInt(var_ones));
				  break;
		}
		
		
		return to_return;

	}

	public static String onesToRomanNumerals(int int_number) {
		String var_ones = Integer.toString(int_number);
		var_ones = var_ones.substring(var_ones.length() - 1 );
		String to_return = "";

		switch (Integer.parseInt(var_ones)) {
			case 0: to_return = "";
				break;
			case 1: to_return = "I";
				break;
			case 2: to_return = "II";
				break;
			case 3: to_return = "III";
				break;
			case 4: to_return = "IV";
				break;
			case 5: to_return = "V";
				break;
			case 6: to_return = "VI";
				break;
			case 7: to_return = "VII";
				break;
			case 8: to_return = "VIII";
				break;
			case 9: to_return = "IX";
				break;
		}

		return to_return;
	}


}

[Flounder]

This will work, good luck

[plenderj]

Originally posted by Flounder
This will work, good luck

Irish ?

[Flounder]

Yes, Dun Laoighaire

[plenderj]

Originally posted by Flounder
Yes, Dun Laoighaire

Ah cool.
You know Everyman Computers on patrick street in dun laoghaire ?

[Flounder]

Actually no, I'm down on Crofton Road on the seafront

[plenderj]

Ah right.
'koz thats our dun laoghaire branch