diff --git a/keisan7.rb b/keisan7.rb
index ee351da..c37e4c5 100755
--- a/keisan7.rb
+++ b/keisan7.rb
@@ -1,12 +1,10 @@
-#!/usr/bin/env ruby
-# -*- coding: utf-8 -*-
 require "curses"
 def keisan(shiki, ichi=0, ans=0.0)
-  suuji=[]; enzan=[]; yuusen={'+'=>1,'-'=>1,'*'=>2,'/'=>2}
+  suuji,enzan = [], []
+  yuusen = {'+'=>1,'-'=>1,'*'=>2,'/'=>2 }
   tekiyou = ->{
-    b=suuji.pop; a=suuji.pop; e=enzan.pop
-    suuji << (e=='+' ? a+b : e=='-' ? a-b : e=='*' ? a*b : a/b)
-  }
+    b, a, e, = suuji.pop, suuji.pop, enzan.pop
+    suuji << (e=='+' ? a+b : e=='-' ? a-b : e=='*' ? a*b : a/b)}
   yomu_atai = lambda do
     ichi += 1 while shiki[ichi]==' '
     raise "式の途中で終わりました" unless shiki[ichi]
@@ -50,20 +48,25 @@
   tekiyou.call while enzan.any?
   [suuji[0], ichi]
 end
-
 include Curses
 init_screen
 cbreak
 noecho
 curs_set(0)
-nyuryoku=""; messeji="Enter=計算 / BS=削除 / Ctrl+L=クリア / q=終了"; kekka=""; ans=0.0
+nyuryoku=""
+messeji="Enter=計算 / BS=削除 / Ctrl+L=クリア / q=終了"
+kekka, ans ="", 0.0
 begin
   loop do
     clear
-    setpos(0,0); addstr("curses電卓（+-*/() 小数）"[0,cols-1])
-    setpos(1,0); addstr(messeji[0,cols-1])
-    setpos(2,0); addstr(("> "+nyuryoku)[0,cols-1])
-    setpos(3,0); addstr(("= "+kekka)[0,cols-1])
+    setpos(0,0)
+    addstr("curses電卓（+-*/() 小数）"[0,cols-1])
+    setpos(1,0)
+    addstr(messeji[0,cols-1])
+    setpos(2,0)
+    addstr(("> "+nyuryoku)[0,cols-1])
+    setpos(3,0)
+    addstr(("= "+kekka)[0,cols-1])
     key=getch
     case key
     when 'q','Q' then break
@@ -76,12 +79,12 @@
         owari += 1 while shiki[owari]==' '
         raise "式の後ろに余計な文字があります" if owari < shiki.length
         ans = kotae
-        kekka = kotae.to_s; nyuryoku=""; messeji="計算しました（ans=#{ans}）"
+        kekka, nyuryoku, messeji = kotae.to_s, "", "計算しました (ans=#{ans} )"
       rescue => e
-        kekka = ""; nyuryoku=""; messeji="エラー: #{e.message}"
+        kekka, nyuryoku, messeji = "", "", "エラー: #{e.message}"
       end
     when 12
-      nyuryoku=""; kekka=""; messeji="クリアしました"
+      nyuryoku, kekka, messeji = "", "", "クリアしました"
     when KEY_BACKSPACE,127,8
       nyuryoku = nyuryoku[0...-1]
     when Integer