Thread: Romain to arabic numbers converter

Hi! so right now i'm trying to do a program to convert romain numbers to arabic numbers. My problem is that I don't have the right to use Methods and Arrays. Only loops and if/else. I actually have no clue on how to do it. N.B. I want clues, not all the code. #wouldbesomuchsimplewithaarrays

Exemple of the execution in the CMD:
java romaintoarabic MCXI
Converted number : 1111

It's impossible to do what you've shown in Post #3 without using arrays. MCXI will be in args[0], and that's an array element. I'm also curious if you can use String's methods. Please be clearer about what you can/can't do or use and post what you've done so far.

Oh I'm sorry. I'm not counting it as a method. But you're right, I'm using the string method. As this point I can convert every single character to a numeral value and add them to each other. But here is my problem: Ex: java romaintoarabic IX Converted number : 11 But actually it should five me 9.

How are we supposed to help you without seeing your code and understanding all of the rules?

I just actually don't know how to do it. Found out that my code is dope

It is possible to convert Roman numbers to Arabic numbers by using loop and if-else statement. Here is my suggestion: read the Roman numbers from the left to the right. If the leftmost number is greater than the number next to it (to the right), then that number (the leftmost) is a positive number. If it is not, then it is a negative number. Then keep comparing the next number (to the right). Notice: in case both successive numbers are equal, treat them like a single number, and keep comparing.

For example: XIV. We first compare X and I. Since X is greater than I, X is a positive number (+10). Then compare I and V. Since I is less than V, then I = -1. After V there is no number, then V = +5. So +10 - 1 + 5 = 14.