From 210367ec889f5910e270d6ea2c7ddb8a8d939e61 Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 20 Jan 1999 04:59:39 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r372, which included commits to RCS files with non-trunk default branches.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@373 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/rational.rb | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'lib/rational.rb')

diff --git a/lib/rational.rb b/lib/rational.rb
index d4112c2956..1282f56410 100644
--- a/lib/rational.rb
+++ b/lib/rational.rb
@@ -1,8 +1,8 @@
 #
 #   rational.rb - 
 #   	$Release Version: 0.5 $
-#   	$Revision: 1.1 $
-#   	$Date: 1996/11/11 04:25:14 $
+#   	$Revision: 1.3 $
+#   	$Date: 1998/03/11 14:09:03 $
 #   	by Keiju ISHITSUKA(SHL Japan Inc.)
 #
 # --
@@ -44,7 +44,11 @@ def Rational(a, b = 1)
 end
   
 class Rational < Numeric
+  @RCS_ID='-$Id: rational.rb,v 1.3 1998/03/11 14:09:03 keiju Exp keiju $-'
+
   def Rational.reduce(num, den = 1)
+    raise ZeroDivisionError, "denometor is 0" if den == 0
+
     if den < 0
       num = -num
       den = -den
@@ -128,6 +132,7 @@ class Rational < Numeric
       den = @denominator * a.numerator
       Rational(num, den)
     elsif a.kind_of?(Integer)
+      raise ZeroDivisionError, "devided by 0" if a == 0
       self / Rational.new!(a, 1)
     elsif a.kind_of?(Float)
       Float(self) / a
-- 
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