1 files changed, 10 insertions, 0 deletions
diff --git a/ruby_1_8_5/sample/fib.rb b/ruby_1_8_5/sample/fib.rb
new file mode 100644
index 0000000000..cde4fba082
--- /dev/null
+++ b/ruby_1_8_5/sample/fib.rb
@@ -0,0 +1,10 @@
+# calculate Fibonacci(20)
+# for benchmark
+def fib(n)
+  if n<2
+    n
+  else
+    fib(n-2)+fib(n-1)
+  end
+end
+print(fib(20), "\n");