Initial revision

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

sample/pi.rb

@@ -0,0 +1,18 @@
+#!/usr/local/bin/ruby
+
+k, a, b, a1, b1 = 2, 4, 1, 12, 4
+
+while TRUE
+  # Next approximation
+  p, q, k = k*k, 2*k+1, k+1
+  a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
+  # Print common digits
+  d = a / b
+  d1 = a1 / b1
+  while d == d1
+    print d
+    $stdout.flush
+    a, a1 = 10*(a%b), 10*(a1%b1)
+    d, d1 = a/b, a1/b1
+  end
+end