#!/bin/bash

# ¾Æ¶óºñ¾Æ ¼ýÀÚ¸¦ ·Î¸¶ ¼ýÀÚ·Î ¹Ù²Ù±â
# ¹üÀ§: 0 - 200
# Á¶ÀâÇÏÁö¸¸ µ¿ÀÛÀº ÇÕ´Ï´Ù.

# ó¸® °¡´ÉÇÑ ¼ýÀÚÀÇ ¹üÀ§¸¦ ´Ã¸®°Å³ª ½ºÅ©¸³Æ®ÀÇ ±â´ÉÀ» Çâ»ó½ÃÅ°´Â °ÍÀº
# µ¶ÀÚ ¿©·¯ºÐÀ» À§ÇØ ¿¬½À¹®Á¦·Î ³²°Ü ³õ½À´Ï´Ù.

# »ç¿ë¹ý: roman number-to-convert

LIMIT=200
E_ARG_ERR=65
E_OUT_OF_RANGE=66

if [ -z "$1" ]
then
  echo "»ç¿ë¹ý: `basename $0` number-to-convert"
  exit $E_ARG_ERR
fi  

num=$1
if [ "$num" -gt $LIMIT ]
then
  echo "ó¸® °¡´É ¹üÀ§ ÃÊ°ú!"
  exit $E_OUT_OF_RANGE
fi  

to_roman ()   # ÇÔ¼ö¸¦ ºÎ¸£±â Àü¿¡ ¹Ì¸® ¼±¾ðÇØ Áà¾ß µË´Ï´Ù.
{
number=$1
factor=$2
rchar=$3
let "remainder = number - factor"
while [ "$remainder" -ge 0 ]
do
  echo -n $rchar
  let "number -= factor"
  let "remainder = number - factor"
done  

return $number
       # µ¶ÀÚ¿ë ¿¬½À¹®Á¦:
       # ÀÌ ÇÔ¼ö°¡ ¾î¶»°Ô µ¿ÀÛÇÏ´ÂÁö ¼³¸íÇØ º¸¼¼¿ä.
       # ÈùÆ®: ¿¬¼ÓÀû »©±â¿¡ ÀÇÇÑ ³ª´©±â.
}
   

to_roman $num 100 C
num=$?
to_roman $num 90 LXXXX
num=$?
to_roman $num 50 L
num=$?
to_roman $num 40 XL
num=$?
to_roman $num 10 X
num=$?
to_roman $num 9 IX
num=$?
to_roman $num 5 V
num=$?
to_roman $num 4 IV
num=$?
to_roman $num 1 I

echo

exit 0