Help please: math or variable problem

Ruby
1

Preface- I know there is an easier way , since I’ll be working into the
thousands.
Anyway, down below I’m taking a number between 10 and 49 and converting
to a
Roman Numeral. I’ve been experimenting with 46, which should return
XXXXVI
only it’s returning XXXXVIIIII

For some reason this line rnm = (rnm-vrnm) is not calculating or not
calculating correctly, though I am doing the raw numbers in IRB and that
works fine.

Also , as a side note, SCITE is highlight (in a brownish color) from the
x
in rnm = (num%x) to the rnm = (rnm-vrnm). Kind of weird, unsure what it
is.
by the way, a) I maybe asking too many questions for one day b) I know
there
is a simpler way to do this , but hopefully my brain will slowly adapt.

if num >= 10 && num <= 49

x = 10
v = 5
rn = (num/x)
rnm = (num%x)
vrnm = rnm/v

rn.times do
print “X”

end
    vrnm.times do
      print "V"

      end

rnm = (rnm-vrnm)
rnm.times do
print “I”
end

    end
2

On 6/25/06, Dark A. [email protected] wrote:

Anyway, down below I’m taking a number between 10 and 49 and converting to a
Roman Numeral. I’ve been experimenting with 46, which should return XXXXVI
only it’s returning XXXXVIIIII

No. It should return XLVI [10 to 50, 5, 1].

X, XX, XXX, XL, L, LX, LXX, LXXX, XC etc…

3

Ah ha! Well back to the drawing board. :slight_smile:

Stuart

4

Take a lock at Ruby Q. #22 for a bunch of solutions to this problem.
Why solve something that’s already been done a hundred times? =)

http://www.rubyquiz.com/quiz22.html

Regards
Ola B.
http://ola-bini.blogspot.com

----- Original Message -----
From: Dark A. [email protected]
Date: Sunday, June 25, 2006 10:11 pm
Subject: Re: help please: math or variable problem
To: [email protected] (ruby-talk ML)

5

I agree and even found this:
http://twt.mpei.ac.ru/MAS/Worksheets/Rim_Arab_Number.mcd
which is a arabic → roman numeral calculator.

However I’m learning to program, and in Ruby and this is an assignment
from
the book. So, yes, ultimately the only value is in helping me to think
these types of problems through. I’m afraid to look at rubyquiz as it
might
be cheating. I’d like to see first how creative I can get before
comparing. Regardless thank you for making me aware of it.

Stuart

6

Dark A. wrote:

v = 5

     end

rnm = (rnm-vrnm)
Surely this line should be:

rnm = rnm - (v * vrnm)

?

I mean, besides the XXXX => XL problem…