Data commit

Task/Pi/Ruby/pi.rb

@@ -0,0 +1,24 @@
+pi_digits = Enumerator.new do |y|
+  q, r, t, k, n, l = 1, 0, 1, 1, 3, 3
+  loop do
+    if 4*q+r-t < n*t
+      y << n
+      nr = 10*(r-n*t)
+      n = ((10*(3*q+r)) / t) - 10*n
+      q *= 10
+      r = nr
+    else
+      nr = (2*q+r) * l
+      nn = (q*(7*k+2)+r*l) / (t*l)
+      q *= k
+      t *= l
+      l += 2
+      k += 1
+      n = nn
+      r = nr
+    end
+  end
+end
+
+print pi_digits.next, "."
+loop { print pi_digits.next }