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わんくま

  1. 東京勉強会#2
    C++/CLI カクテル・レシピ
  2. 東京勉強会#3
    template vs. generics
  3. 大阪勉強会#6
    C++むかしばなし
  4. 東京勉強会#7
    C++むかしばなし
  5. 東京勉強会#8
    STL/CLRによるGeneric Programming
  6. TechEd 2007 @YOKOHAMA
    C++・C++/CLI・C# 適材適所
  7. 東京勉強会#14
    Making of BOF
  8. 東京勉強会#15
    状態遷移
  9. 名古屋勉強会#2
    WinUnit - お気楽お手軽UnitTest

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  1. Cで実現する「ぷちオブジェクト指向」
  2. CUnitによるテスト駆動開発
  3. SQLiteで組み込みDB体験（2007年版）
  4. C++/CLIによるCライブラリの.NET化
  5. C# 1.1からC# 3.0まで～言語仕様の進化
  6. BoostでC++0xのライブラリ「TR1」を先取りしよう (1)
  7. BoostでC++0xのライブラリ「TR1」を先取りしよう (2)
  8. BoostでC++0xのライブラリ「TR1」を先取りしよう (3)
  9. BoostでC++0xのライブラリ「TR1」を先取りしよう (4)
  10. BoostでC++0xのライブラリ「TR1」を先取りしよう (5)
  11. C/C++に対応した、もうひとつのUnitTestFramework ─ WinUnit
  12. SQLiteで"おこづかいちょう"
  13. STL/CLRツアーガイド
  14. マージ・ソート : 巨大データのソート法
  15. ヒープソートのアルゴリズム
  16. C++0xの新機能「ラムダ式」を次期Visual Studioでいち早く試す
  17. .NETでマンデルブロ集合を描く
  18. .NETでマンデルブロ集合を描く(後日談)
  19. C++/CLI : とある文字列の相互変換(コンバージョン)
  20. インテルTBBによる選択ソートの高速化
  21. インテルTBB3.0 によるパイプライン処理
  22. Visual C++ 2010に追加されたSTLアルゴリズム
  23. Visual C++ 2010に追加されたSTLコンテナ「forward_list」
  24. shared_ptrによるObserverパターンの実装
  25. .NETでマンデルブロ集合を描く(番外編) ── OpenCLで超並列コンピューティング
  26. StateパターンでCSVを読む
  27. 状態遷移表からStateパターンを自動生成する
  28. 「ソートも、サーチも、あるんだよ」～標準C++ライブラリにみるアルゴリズムの面白さ
  29. インテルTBBの同期メカニズム
  30. なぜsetを使っちゃいけないの?
  31. WPFアプリケーションで腕試し ～C++でもWPFアプリを
  32. C++11 : スレッド・ライブラリひとめぐり
  33. Google製のC++ Unit Test Framework「Google Test」を使ってみる
  34. メールでデータベースを更新するココロミ
  35. Visitorパターンで遊んでみたよ
  36. Collection 2題：「WPFにバインドできる辞書」と「重複を許す検索set」
  37. Visual C++ 2012：stateless-lambdaとSQLiteのぷち拡張
  38. 「Visual C++ Compiler November 2012 CTP」で追加された6つの新機能

@IT

  1. Vista時代のVisual C++の流儀（前編）Vista到来。既存C／C++資産の.NET化を始めよう！
  2. Vista時代のVisual C++の流儀（中編）MFCから.NETへの実践的移行計画
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  4. C++開発者のための単体テスト入門 第1回 C++開発者の皆さん。テスト、ちゃんとしていますか？
  5. C++開発者のための単体テスト入門 第2回 C++アプリケーションの効率的なテスト手法（CppUnit編）
  6. C++開発者のための単体テスト入門 第3回 C++アプリケーションの効率的なテスト手法（NUnit編）

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状態遷移ってばこの程度のもの

ネタ元 → 電卓アプリの状態遷移図

オブジェクト指向してない電卓のつくりかた
アクアさんとこにあった状態遷移図を表にするとこーなる↓

電卓基本動作の状態遷移表
初期状態 数値入力状態 数式作成状態 計算結果表示状態
数字入力 なにかする
→数値入力状態		 なにかする
→数値入力状態		 なにかする
→数値入力状態		 なにかする
→数値入力状態
演算子入力 なにかする
→初期状態		 なにかする
→数式作成状態		 なにかする
→数式作成状態		 なにかする
→数式作成状態
'='入力 なにかする
→初期状態		 なにかする
→計算結果表示状態		 なにかする
→計算結果表示状態		 なにかする
→計算結果表示状態
'C'入力 なにかする
→初期状態		 なにかする
→初期状態		 なにかする
→初期状態		 なにかする
→初期状態


読み方はわかるよね、たとえば左上隅のマスは:
「初期状態で数字入力されたらなにかして数値入力状態に遷移せよ」ってことね。

つまり、状態遷移は
(状態、事象、動作、遷移)　の集合です。
もっといえば、「なんかする」と「次の状態」を要素とする
二次元配列 状態遷移表[状態数][事象数] で表現できます。
試験にでるよー　でねーよ

各マスの「なんかする」をテケトーに実装し、
状態を初期状態にセットして準備完了。
あとはボタンが押されるたんびに:

　事象 = ボタンに割り当てられたデキゴト;
　状態遷移表[状態][事象].なんかする();
　状態 = 状態遷移表[状態][事象].次の状態;

↑これを繰り返せば電卓なんかあっちゅーまに動きますぶっちゃけ。

あとはほんのちょっとのヒマと「いぢわるスタヂオ2005」と
しょっきんぐぴんくまを用意すれば電卓祭りの神輿が担げます。
お祭りﾜｼｮｰｲ

投稿日時 : 2007年7月12日 10:02

コメントを追加

# re: 状態遷移ってばこの程度のもの 2007/07/12 12:53 通り＊

勉強になるなぁ～
こうやって表になったのを見ると、状態と事象をコレクションか何かに設定して、それぞれの「何かする」でイベントが発生するようにすれば、ハンドラを実装するだけでちゃんと動くようになるフレームワーク（コントロール？）とかも作れたりしないかなって思いました。
あ、これだけだとコントロールにするほどでもないかな...

# re: 状態遷移ってばこの程度のもの 2007/07/12 13:16 επιστημη

つ【http://www.s34.co.jp/cpptechdoc/article/xml/fsmgen/index.html】

# re: 状態遷移ってばこの程度のもの 2007/07/12 13:51 通り＊

私のアイデア既に盗まれてる！（違ｗ
でも、私の想像より遙かに凄いことになってますね。
ぎゅっとまとめると、
状態遷移表を表現するＤＴＤに従ったＸＭＬで状態遷移を定義し、ＸＳＬで資料を出力し、"STATEパターン"でフレームワークを作成し、最後にそれを利用する、ってことみたい。。。？
頭がパンクしそうですｗ
これでどなたか電卓作って見せてください！＞＜（Ｃ＃希望）
＃ところでアクションがThankYouって、横領？ｗ

# re: 状態遷移ってばこの程度のもの 2007/07/12 14:42 επιστημη

6年ほど前に書いたやつです。
今ならSystem.Xml 使ってほいほい書けちゃうでしょねー。
なんかのついでにC#でre-writeしたいと思いながら今に至っておりますなり orz

# re: 状態遷移ってばこの程度のもの 2007/07/12 16:02 通り＊

６年も前に盗まれてた！（違違ｗ
お時間あるときに、またお願いします。vote=1
＃つ【祭りのついで】

# re: 状態遷移ってばこの程度のもの 2007/07/12 22:03 επιστημη

そーそー、モノによっては"なんかする"の結果次第で遷移先が変化するばあいがあります。
んなときゃ"なんかする"が次の状態を返すことにして:
状態 = 状態遷移表[状態][事象].なんかする();
ってやるですね。

あ…表は真四角だからJAG配列でなくていいか。
状態 = 状態遷移表[状態,事象].なんかする();
の方が楽ね。

# 15Calc電卓ソースコード公開～ 2007/08/03 0:49 XAMLab(ザムラボ)

15Calc電卓ソースコード公開～

# 電卓の話で妄想したこと 2008/03/17 22:19 凪瀬 Blog

電卓の話で妄想したこと

# ジェネリクスを最大限活用するための設計技法 Stateパターン編 2008/08/20 0:10 凪瀬 Blog

ジェネリクスを最大限活用するための設計技法 Stateパターン編

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