From: "Nik Z." <esperantoca@...>
Date: 2009-11-11T10:59:40+09:00
Subject: Re: Roman Numerals (Arrgh!)

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I have to say Grennady's way is quite elegant; I didn't even think along
that line--Rick wanted "each individual digits"--so I just provided that via
Regex w/o even thinking about V L D :-)

My bad...



On Tue, Nov 10, 2009 at 4:46 PM, Nik Z. <esperantoca@gmail.com> wrote:

> Hi, Rick,
>
>     I'm not gonna give you the COMPLETE answer to your homework, but think
> along this line:
>
> 1. Split the input number on Non_Word_Boundary (basically split on NOTHING)
>
> arrNumber_of_Digits = gets().chomp().to_s.split //
>
>     This should give your on the digits you have each individually; meaning
> how many Ones, how many Tens, and how many Hundreds.....
>
>    And the build your strRoman = "X" * (the corresponding no of digits)
>
> 2. Also you will need validate what your professor is going to input in the
> first place is an integer to begin with, with something like this
>
> puts "Invalid input" unless ARGV[0]=~ /^\d+$/
>
> On Tue, Nov 10, 2009 at 3:56 PM, Rick Barrett <chngth3wrld@yahoo.com>
> wrote:
>
> > I have a homework assignment where I have to convert an inputted integer
> > into Roman Numerals. I was doing fine building upon the previous steps
> > until the arrays came in. We have to use the format/guidelines the
> > professors give us or we get points counted off. I've looked at so many
> > ways to do this program through Google, but none of the examples I've
> > seen are even close to what the professor wrote out.
> >
> > Basically, in my code I have to use the array $numerals and create pairs
> > with the integer and its corresponding Roman Numeral.
> >
> > What I can't figure out how to do is say something like...
> >
> > For each 10 of the inputted number put an X
> >
> > I was thinking something along the lines of dividing the inputted number
> > by the decimal and taking the remaining integer and multiplying the
> > Roman Numeral by that integer.
> >
> > Like 30/10 = 3 so "X" * 3 would print out XXX
> >
> > But I have no idea how to do that with the $numerals array.
> >
> > How do I get my program to say divide the inputted number by the decimal
> > part of the pair and then give the numeral part that many times?
> >
> > def roman_numeral(number)
> >
> > $numerals = [[10, "X"],
> >      [5, "V"],
> >      [1, "I"]]
> >
> > result = ""
> >
> >  $numerals.each() do |decimal, numeral|
> >
> >
> >  result = new_variable
> >  end
> >
> >  return result
> > end
> >
> > puts "Enter a number to be converted to Roman Numerals."
> > my_number = gets().chomp().to_i()
> > puts roman_numeral(my_number)
> > --
> > Posted via http://www.ruby-forum.com/.
> >
> >
>

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