diff --git a/csv.rb b/csv.rb
new file mode 100755
index 0000000..bd05f2f
--- /dev/null
+++ b/csv.rb
@@ -0,0 +1,10 @@
+#!/usr/bin/env ruby
+# -*- coding: utf-8 -*-
+
+require'csv'
+
+csv = CSV.generate("test.csv",:headers => true) do |test|
+  test.add_row(["written","by","csv.rb"])
+end
+
+print csv                       # ??
diff --git a/ej.csv b/ej.csv
new file mode 100644
index 0000000..6a3e99c
--- /dev/null
+++ b/ej.csv
Binary files differ
diff --git a/ej.rb b/ej.rb
new file mode 100755
index 0000000..4c823e2
--- /dev/null
+++ b/ej.rb
@@ -0,0 +1,10 @@
+#!/usr/bin/env ruby
+# -*- coding: utf-8 -*-
+
+require'csv'
+
+data = CSV.read("ej.csv", :headers => true)
+
+#=~ Regexp.new(ARGV[0])#曖昧検索(?)
+
+data.
diff --git a/hikisu.rb b/hikisu.rb
new file mode 100755
index 0000000..46e6c5c
--- /dev/null
+++ b/hikisu.rb
@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+# -*- coding: utf-8 -*-
+
+p ARGV[0]
diff --git a/kenkyu.rb b/kenkyu.rb
index 757908a..87d6764 100755
--- a/kenkyu.rb
+++ b/kenkyu.rb
@@ -274,5 +274,7 @@
 (n == 1)? (puts"a") : (puts"b") # =>a(カッコ無いとエラー)
 
 a = n == 2? 2:3                 # これはいける
-p a                             # =>3
+p a
+# =>3
 end
+
diff --git a/monte_calro2.rb b/monte_calro2.rb
new file mode 100755
index 0000000..79f14f9
--- /dev/null
+++ b/monte_calro2.rb
@@ -0,0 +1,21 @@
+#!/usr/bin/env ruby
+# coding: utf-8
+# -*- coding utf-8 -*-
+
+print"モンテカルロ法で 円周率を求めるよ!\n"
+print"点を打つ回数を入れてね:"
+kaisu = gets.to_i
+in_circle = 0
+
+kaisu.times do                  # 点を打つところ
+  srand
+  x = rand (-1.0..1.0)
+  y = rand (-1.0..1.0)
+  kyori = Math.sqrt(x** 2 + y** 2)
+  if kyori <= 1                 # 平方根したほう
+    in_circle += 1
+  end
+end
+
+pi = (in_circle.to_f / kaisu.to_f )* 4
+printf("円周率は %f です。\n",pi)
diff --git a/test.csv b/test.csv
new file mode 100644
index 0000000..aae69d9
--- /dev/null
+++ b/test.csv
@@ -0,0 +1 @@
+valA,balB