なぜ技術がないと面白いゲームが創れないのか？

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE %&-J()5803,4*OD ͳٕͥज़͕ͳ͍ͱ  ໘ന͍ήʔϜ͕૑Εͳ͍ͷ͔ʁ 1SFTFOUFECZ(.0ΞϓϦΫϥ΢υ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ࣗݾ঺հɿాଜ༞थ ΤετϙϦε఻ه ͱ͍͏ήʔϜʹಌΕͯ ήʔϜۀքʹೖΓ·ͨ͠

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ஫ɿ͓࿩͢Δͷ͸ ໘ന͍ήʔϜͷ ૑ΓํͰ͸͋Γ·ͤΜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ήʔϜ։ൃ ָ͠ΜͰ·͔͢ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ήʔϜ։ൃ͸ ະિ༗ͷةػʹ௚໘͍ͯ͠·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ։ൃظؒɿ̍೥ʙ̏೥ ։ൃ༧ࢉɿ਺ԯʙ਺ेԯ ։ൃن໛ɿ਺ेਓʙඦਓ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ήʔϜ։ൃʹσεϚʔν ͦΜͳ࿩΋Α͘ฉ͖·͢

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ήʔϜۀք ࢒ࠅ෺ޠ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ྫ͑͹

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ̎೥͔͚ͨ ׬੒ؒۙͷλΠτϧ ϓϩδΣΫτதࢭ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ൃച͚ͨ͠ΕͲ όά͕ଟ͗ͯ͢ ϨϏϡʔ͕ࢄʑ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Α͏΍͘׬੒ ൃചޙϨϏϡʔΛΈΔͱ Ͳ͏΍ΒϢʔβʔ͞Μ͕ ๬Μͩ΋ͷͰ͸ͳ͔ͬͨʜʜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ࢮࢡྦྷʑ ͱ͍͏͜ͱ͸ ௝͍͠࿩Ͱ͸͋Γ·ͤΜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Կނ͔ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Ϣʔβʔࢹ఺ͷܽ೗ ࢼߦࡨޡͷෆ଍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Ϣʔβʔࢹ఺ͷܽ೗ ࣦഊͷଟ͘͸ɺ Ϣʔβʔ͕๬ΜͰ͍ͳ͍΋ͷΛ ఏڙ͍ͯ͠Δ ʮ։ൃऀ͕૑Γ͍ͨήʔϜΛ૑Δʯ ʮଘࡏ͠ͳ͍૝ఆϢʔβʔʯ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ࢼߦࡨޡͷෆ଍ ࢓༷ॻʹ͸໘ന͘͢Δ࢓༷͸ॻ͍ͯͳ͍ ʮ͍ͭ͜͸࠷ߴʹ໘ന͍ͧʂʯ ͱ͍͏࢓༷ॻΛॻ͍ͯ͘ΕΔ ήʔϜσβΠφʔ͸ଘࡏ͠ͳ͍ Αͬͯɺࢼߦࡨޡ͕ඞਢͱͳΔ

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ٕज़Ͱ ͦ͜ʹͲ͏ ཱͪ޲͔͏ͷ͔

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ٕज़͕ͳ͚Ε͹ ໘ന͍ήʔϜ͕૑Εͳ͍ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Ͱ͸ɺٕज़͕͋Ε͹ ໘ന͍ήʔϜ͕ ૑ΕΔͷͰ͠ΐ͏͔ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ൱

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ෳࡶͳٕज़ ߴ౓ͳٕज़ ৽͍ٕ͠ज़ ͦΕ͸໘ന͞ͱ௚݁͠·ͤΜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ͳΒɺ ٕज़͸ඞཁͳ͍ͷͰ͠ΐ͏͔ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ൱

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ˓˓ͱ͍͏ ΞΠσΟΞ͕ ͋ΔΜ͚ͩͲʜʜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE 無理いままでやったことないし…… 重すぎるし…… 時間ないし…… 前例ないし…… ざわざわ…… ざわざわ…… ざわざわ……

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ͜͏ͳΔͱ ΞΠσΟΞ͸ ࣺͯΒΕͯ͠·͍·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ʮࣦഊΛڪΕɺϦεΫΛͱΒͳ͍ʯ ͜ΕΛଓ͚Δͱ ήʔϜ͕ࢮʹ·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ͱ͸͍͑ɺ ແܭըʹ ૿ங͍ͯ͘͠ͱʜʜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE جຊγεςϜ ότϧ̖ ότϧ̗ ότϧ̘ ·ΔͰ่Ε͔͚ͷδΣϯΨʜʜ ότϧ% ότϧ& ௥ՃγεςϜ ότϧ

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ඞཁͳٕज़ͱ͸ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE มԽʹରԠ͍ͯ͘͠ྗ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ήʔϜ͸  ΍Γ͍ͨ͜ͱʹ ݶք͕ͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ͋Ε΋΍Γ͍ͨ ͜Ε΋΍Γ͍ͨ ͜Μͳ͜ͱ͕Ͱ͖ͨΒʜʜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE มԽʹڧ͍ઃܭΛ͢Δ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ։ൃத΋ ͦͯ͠ ϦϦʔεޙ΋

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ࢼߦࡨޡΛॏͶΔͨΊͷ ٕज़ྗ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ࣦഊΛڪΕͣɺ ϦεΫΛͱΓɺ ͦΕΛΧόʔͰ͖Δྗ

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มԽʹߋ৽ͱ͸ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ੲͷίϯιʔϧήʔϜͰ͸ ʮ׬੒ͤ͞Ε͹ऴΘΓʯ ͱ͍͏ߟ͕͑͋Γ·ͨ͠

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ͔͠͠ɺ ࠓຆͲͷήʔϜ͸ Ξοϓσʔτͱ͍͏ ֓೦͕͋Γ·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ̍೥ޙɺ̎೥ޙɺ̏೥ޙ ήʔϜ͕ Ͳ͏ͳ͍ͬͯΔ͔͸ ୭ʹ΋Θ͔Βͳ͍ͷͰ͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ͳͷͰɺ ʮมԽΛલఏͱͨ͠ઃܭʯ ͕ඞਢʹͳΓ·͢

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ྑ͍ઃܭͱ͸ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ήʔϜΛ໘ന͍ͨ͘͠ͱ͖ʹ अຐʹͳΒͣ ΑΓ໘ന͘Ͱ͖Δ ॊೈͳߏ଄ʹ͓ͯ͘͜͠ͱ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ήʔϜ։ൃͰඞͣى͜Δ ϑΟʔνϟʔɾΫϦʔϓ ͱ ࢓༷มߋ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ϑΟʔνϟʔɾΫϦʔϓͱ͸ ػೳͷ௥Ճ͕Կ౓΋ߦΘΕ ͦͷ݁ՌɺෳࡶͰ ࢖͍ͮΒ͍΋ͷʹͳΔ͜ͱ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ήʔϜ͸৮ͬͯΈͳ͚Ε͹ ༡ΜͰΈͳ͚Ε͹ ໘ന͍͔Ͳ͏͔Θ͔Βͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ଈͪ มߋ͸ආ͚Δ͜ͱ͕Ͱ͖ͳ͍ ʮ࠷ॳʹશ෦ܾΊͯԼ͍͞ʯ͸ ήʔϜͰ͸Ͱ͖ͳ͍

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Ͳ͏ର߅͢Δ͔

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ̑ͭͷॏཁͳࢦ਑ͱͳΔݪଇ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ͨͩ͠ ݪଇओٛऀʹ ͳͬͯ͸͍͚ͳ͍͜ͱʹ ஫ҙ

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୯Ұ੹೚ͷݪଇ ̍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ΫϥεΛมߋ͢Δཧ༝͸ ̍ͭҎ্ଘࡏͯ͠͸ͳΒͳ͍ɻ ୯Ұ੹೚ͷݪଇ 5IF4JOHMF3FTQPOTJCJMJUZ1SJODJQMF431

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ໾ׂʢ੹೚ʣʹมߋཧ༝ ଈͪ ΫϥεΛมߋ͢Δཧ༝͸ ҰͭͰͳ͚Ε͹ͳΒͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ҰͭͷΫϥεʗϞδϡʔϧ͸ Ұͭͷ੹೚͔͠ ࣋ͬͯ͸ͳΒͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE class Programmer { // ԿͰ΋΍ΔϓϩάϥϚʔΫϥε public String Programming(); // ϓϩάϥϜΛ͢Δ public Document writeSpecification(); // ࢓༷ॻΛॻ͘ public GanttChart getNewestProgressAll(); // શମਐḿ } ͜ͷྫͰ͸ɺϓϩάϥϚʹ͋·Γʹ΋ଟ͘ͷ੹೚Λ ෛΘ͍ͤͯ·͢ɻ ਐḿͷ΍Γํ͕มΘΕ͹͜ͷΫϥεΛมߋɺ ࢓༷ॻͷܗ͕ࣜมΘΕ͹͜ͷΫϥεΛมߋɺ Կ͔͋Δ౓ʹ͜ͷΫϥεΛ৮ΔӋ໨ʹͳΓ·͢ɻ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE class Programmer { public String Programming(); // ϓϩάϥϜΛ͢Δ } class GameDesigner { public Document writeSpecification(); // ࢓༷ॻΛॻ͘ } class ProjectManager { public GanttChart getNewestProgressAll(); // શମਐḿ } ໾ׂΛม͑ͯ͋͛Δ͜ͱͰɺγϯϓϧʹͳΓ·͢ɻ ͨͩ͠ɺצҧ͍͠΍͍͢ͷͰ͕͢ɺ ҰͭͷΫϥε͸Ұͭͷػೳɺͱ͍͏ҙຯͰ͸͋Γ·ͤΜɻ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ྫ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Rectangle +Draw() +Area() Computational Geometry Application ジオメトリアプリ計算させようとする Graphical Application 描画させようとするグラフィックアプリ GUI 責任が二つ！！！ ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Rectangle +Draw() Computational Geometry Application ジオメトリアプリ Graphical Application グラフィックアプリ GUI Geometric Rectangle +Area() 責任を分解 ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ 責任は一つ！

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ΦʔϓϯɾΫϩʔζυͷݪଇ ̎

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ιϑτ΢ΣΞͷߏ੒ཁૉ ʢΫϥεɺϞδϡʔϧɺؔ਺ͳͲʣ͸ ֦ுʹରͯ͠։͍͍ͯͯɺ मਖ਼ʹରͯ͠ ด͍ͯ͡ͳ͚Ε͹ͳΒͳ͍ɻ ΦʔϓϯɾΫϩʔζυͷݪଇ  5IF0QFO$MPTFE1SJODJQMF0$1

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ֦ுʹରͯ͠։͔Ε͍ͯΔ ʹ࢓༷มߋʹڧ͍ ༷ʑͳΞΠσΟΞʹରԠͰ͖Δ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE मਖ਼ʹରͯ͠ด͍ͯ͡Δ ʹΤϯόά͠ʹ͍͘ Ұ෦௚ͨ͠ΒશମʹӨڹ͢Δ ͱ͍͏ͷ͸ઈରʹආ͚Δ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE 10:00ग़ࣾ 12:00MTG 13:00ϥϯν 19:00ؼ୐ ྫͱͯ͠ͷ͋Δ̍೔ɿ  ͜͏ͨ͠ߏ଄ʢྲྀΕʣͰ͋Ε͹ɺ ॱংΛ͍Ε͔͑ͨΓɺ ׂΓࠐΈΛ͢Δ͜ͱ͕Ͱ͖Δɻ ݸʑ͕ૄ݁߹ͱݴ͑Δɻ 15:00MTG 17:00ษڧձ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE 10:00 ग़ࣾ 10:30 A͞ΜͱMTG 11:00 A͞ΜMTG౿·͑ͯB͞ΜͱMTG 12:00 B͞ΜMTG౿·͑ͯεέδϡʔϧMTG 13:00 εέδϡʔϧMTG౿·͑ͯλεΫMTG 14:00 λεΫMTG౿·͑ͯΞαΠϯMTG 15:00 ΞαΠϯMTG౿·͑ͯ࠾༻MTG ྫͱͯ͠ͷ͋Δ̍೔ɿ  ͜͏ͨ͠ྲྀΕʢߏ଄ʣ͸ɺ Կ͔Λલఏʹಈ͍͍ͯΔͨΊɺ ඇৗʹ༥௨͕ར͖ͮΒ͍ɻ Ұ͕ͭϦεέ͞ΕΔ͚ͩͰɺ ଞͷ.5(͕։࠵Ͱ͖ͳ͔ͬͨΓɺ ҙຯ͕ͳ͘ͳͬͯ͠·͏ɻ ݸʑ͕ີ݁߹ʹͳ͍ͬͯΔɻ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ྫ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Client 具体的に実装されたClientがServerを利用している＝オープン・クローズドの原則に反している Server Clientが別のServerを使いたいとき、  Clientクラスを変更しなければならない ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Client Client Interfaceという抽象クラスをつくるこれはServerが実装するClientが使う口である ClientはServerとではなくInterfaceと会話する <> Client Interface Server Clientは Serverが別物になっても気がつくことはない ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ଈͪ ʮ։͍͍ͯΔʯͱ͸ɺ ৼΔ෣͍Λ֦ுͰ͖Δ͜ͱ ʮด͍ͯ͡Δʯͱ͸ɺ ଞʹӨڹΛ༩͑ͳ͍͜ͱ

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Ϧείϑͷஔ׵ݪଇ ̏

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ೿ੜܕ͸ ͦͷجຊܕͱ ஔ׵ՄೳͰͳ͚Ε͹ͳΒͳ͍ɻ -JTLPWͷஔ׵ݪଇ 5IF-JTLPW4VCTUJUVJPO1SJODJQMF-41

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE -JTLPWʢϦείϑʣ͸ ਓͷ໊લͳͷͰؾʹ͠ͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE جຊܕʹͰ͖Δ͜ͱ͕ ೿ੜܕͰ Ͱ͖ͳ͘ͳͬͯ͸͍͚ͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ʮਖ਼ํܗ͸௕ํܗͰ͋Δʯ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE class Rectangle { // ௕ํܗ public Rectangle(int x, int y, int width, int height) { … } public void SetWidth(int width) { … } public void SetHeight(int height) { … } } class Square : Rectangle { // ௕ํܗΛܧঝͯ͠ਖ਼ํܗ public Square(int x, int y, int width, int height) { … } public void SetWidth(int width) { … } public void SetHeight(int height) { … } } ྫ͑͹ɺ௕ํܗΛܧঝͯ͠ਖ਼ํܗΛͭ͘Δ ͦΕ͸ਖ਼͍͔͠ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ౴ɿਖ਼͘͠ͳ͍ ਖ਼ํܗ͸ৗʹ 8JEUIʢ෯ʣ)FJHIUʢߴ͞ʣ Λຬͨ͢ඞཁ͕͋Δ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Αͬͯɺਖ਼ํܗͷ 4FU8JEUI4FU)FJHIU͸ɺ ௚ײʹ൓͢Δಈ࡞Λ͢Δ ͦͷͨΊɺਖ਼ํܗ͸௕ํܗͱ ஔ͖׵͑Δ͜ͱ͕Ͱ͖ͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ਖ਼ํܗ͸௕ํܗͱ ஔ͖׵͑Δ͜ͱ͕Ͱ͖ͳ͍ ͱ͍͏͜ͱ͸ ܧঝͯ͠͸͍͚ͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ஔ͖׵͑Δ΋ͷ͕ Ͱ͖ͳ͍΋ͷΛ ಉҰͷ΋ͷͱͯ͠ ѻͬͯ͸͍͚ͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ྫ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Shape ShapeType Circle +Draw() Square +Draw() void DrawShape(Shape& s) { switch(s.type) { case Square: ((Square&)s).Draw(); break; case Circle: ((Circle&)s).Draw(); break; } これではCircleやSquareは  Shapeの代わりに使えない。 ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ Draw()  がない

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ґଘؔ܎ٯసͷݪଇ ̐

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE B ্ҐͷϞδϡʔϧ͸  ԼҐͷϞδϡʔϧʹ  ґଘͯ͠͸ͳΒͳ͍ɻ  ͲͪΒͷϞδϡʔϧ΋  ʮந৅ʯʹґଘ͢΂͖Ͱ͋Δɻ ґଘؔ܎ٯసͷݪଇ  5IF%FQFOEFODZ*OWFSTJPO1SJODJQMF%*1

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE C ʮந৅ʯ͸࣮૷ͷৄࡉʹ  ґଘͯ͠͸ͳΒͳ͍ɻ  ࣮૷ͷৄࡉ͕  ʮந৅ʯʹґଘ͢΂͖Ͱ͋Δɻ ґଘؔ܎ٯసͷݪଇ  5IF%FQFOEFODZ*OWFSTJPO1SJODJQMF%*1

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ্ҐͷϞδϡʔϧ͸ ԼҐͷϞδϡʔϧʹ ґଘͯ͠͸͍͚·ͤΜ ͲͪΒ΋ ʮந৅ʯʹґଘ͢΂͖Ͱ͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ʮந৅ʯ͸ ࣮૷ͷৄࡉʹ ґଘͯ͠͸͍͚·ͤΜ ࣮૷ͷৄࡉ͕ ʮந৅ʹʯґଘ͢΂͖Ͱ͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Ͳ͏͍͏͜ͱͰ͠ΐ͏͔ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ൶ΛΠϝʔδ͠·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE υΞʹ͸υΞͦͷ΋ͷͱ υΞϊϒ͕͋Γ·͢ υΞ͕ϊϒʹґଘ͍ͯ͠Δͷ͔ʁ ϊϒ͕υΞʹґଘ͍ͯ͠Δͷ͔ʁ ͲͪΒͰ͠ΐ͏͔ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ྫ͑͹۩ମతʹଘࡏ͢Δ  ʮమͷυΞʯʮ伴ͷ͔͔Δϊϒʯ  ͸ʮ࣮૷ʯͰ͢ ʮந৅ʯͰ͋ΔʮυΞʯʮϊϒʯ  ʹ໨Λ޲͚·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ͦ͏Ͱ͢ ࣮૷Ͱ͋ΔʮమͷυΞʯ͸ ந৅Ͱ͋ΔʮυΞʯʹґଘ͍ͯ͠·͢ ࣮૷Ͱ͋Δʮ伴ͷ͔͔Δϊϒʯ͸ ந৅Ͱ͋Δʮϊϒʯʹґଘ͍ͯ͠·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ྫ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Lamp +TurnOn() +TurnOff() Button +Poll() ButtonはPollでメッセージを受け取るとボタンの状態からLampのTurnOn/TurnOffを呼び出し明かりを灯すか消します。これは何故間違っているのでしょうか？ ButtonはLampに直接依存しているので、他のスイッチを制御できません。 ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE <>  ButtonServer +TurnOn() +TurnOff() Button +Poll() Lamp 上位とは何か？  それは即ち「抽象」です。 Buttonが依存するのは、 ButtonServerというInterfaceで  あるべきで、LampはButtonServerを  実装すれば良いので依存が逆転します。 ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ

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ΠϯλʔϑΣΠε෼཭ͷݪଇ ̑

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ΫϥΠΞϯτʹɺ  ΫϥΠΞϯτ͕ར༻͠ͳ͍  ϝιου΁ͷґଘΛ  ڧ੍ͯ͠͸ͳΒͳ͍ɻ ΠϯλʔϑΣʔε෼཭ͷݪଇ  5IF*OUFSGBDF4FHSFHBUJPO1SJODJQMF*41

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ؔ৺ͷ෼཭ ͱ΋ݴΘΕ·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ՄೳͳݶΓ ॏෳ͕ͳ͍ ෳ਺ͷػߏʹ෼཭͢Δ͜ͱ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ྫ͑͹ ΧʔυೖΕΛ૝૾͠·͢ ෳ਺ͷϙέοτΛ࣋ͬͨΧʔυೖΕ ༷ʑͳΧʔυ͕ೖΓ·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Ͱ͸ɺศརͦ͏͔ͩΒͱ ʮͲΜͳΧʔυͰ΋ೖΔΧʔυೖΕʯ Λઃܭͨ͠ΒͲ͏Ͱ͠ΐ͏͔ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE B社の名刺どんなカードでも入る  カード入れ A社の名刺会員証チケット ݶΓ͕ͳ͍΋ͷʹରԠ͢Δͱ ԿͰ΋ೖΔʹංେԽͨ͠ޱ Λ૑Β͟ΔΛಘ·ͤΜ ݱ࣮Ͱ͸Χʔυͷ࢓༷ͱ͍͏ͷ͸ܾ·͍ͬͯ·ͤΜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ৽͍͠ن֨ɺαΠζͷΧʔυ͕ ొ৔͢Δͨͼʹ ଞͷશͯͷΧʔυΛೖΕ͍ͯͨޱ͕ ӨڹΛड͚Δ͜ͱʹͳΓ·͢

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ྫ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Door Timed Door <> Timer Client +Lock() +Unlock() +IsOpen() + TimeOut() Timer Doorから、一定時間開放されていると  警報が鳴るTimed Doorを作りましたが……。 DoorというInterfaceがTimeOutという口を使う羽目に。 Doorを汚染 ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Door Timed Door <> Timer Client +Lock() +Unlock() +IsOpen() + TimeOut() Timer + TimeOut() Door Timer  Adapter + TimeOut() TimerClientから派生する  Adapterを作成具体的処理は TimedDoorに委譲 ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Door Timed Door <> Timer Client +Lock() +Unlock() +IsOpen() + TimeOut() Timer + TimeOut() 多重継承に近いことができるならこうした設計も考えられる ࢀߟɿϩόʔτɾ$ɾϚʔνϯʢʣʮΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛʯ4#ΫϦΤΠςΟϒ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ઃܭͷݪଇ͸ ݱ࣮తͳ໰୊Λ ղܾ͢Δ͜ͱʹ΋ ౰ͯ͸·Γ·͢

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ήʔϜ։ൃͷ ϙΠϯτ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ݴΘΕͯͳ͍͜ͱͰ΋ ༧ଌ͓ͯ͘͠

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ϓϩάϥϚʮ͜Εͬͯɺ̍छྨͰ͢ΑͶʁʯ σΟϨΫλʔʮͦ͏ͩͶɺࠓͷͱ͜Ζ͸ʯ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ൒೥ޙʜʜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE σΟϨΫλʔʮ͋Ε૿΍͍ͨ͠Μ͚ͩͲɺ ɹɹɹɹɹɹɹ͍͚Δʁʯ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE @ Ωλʔ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ϓϩάϥϚʮແཧͰ͢ɻ  ɹɹɹɹɹɹͩͬͯɺ૿΍͞ͳ͍ͬͯ ɹɹɹɹɹɹ͍ͬͨ͡Όͳ͍Ͱ͔͢ʯ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Կઍճ Կສճͱ ܁Γฦ͞Εͨ ͜ͷ΍ΓͱΓʜʜ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ࢥ͍ͩͦ͏ ԿͷҝʹήʔϜΛ  ૑͍ͬͯΔͷ͔ʁ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE Ϣʔβʔ͞Μ͕ ໘ന͍ͱײͯ͘͡ΕΔͨΊʹ ૑͍ͬͯΔ ໨త͸׬੒ͤ͞Δ͜ͱ ऴΘΒͤΔ͜ͱͰ͸ͳ͍

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ίϯηϓγϣϯ ϓϩτλΠϓ ΞϧϑΝ ϕʔλ Ϛελʔ ෆ ֬ ࣮ ੑ ߴ ௿ σόοά ήʔϜ։ൃͷϑΣΠζͱ ෆ࣮֬ੑͷཧ૝తͳ૬ؔਤ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ෆ࣮֬ੑΛ ঃʑʹɺ࣮ͦͯ֬͠ʹ ௵͍ͯ͘͠ͷ͕ ϓϩάϥϚͷ੹຿Ͱ͋Δ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE εέδϡʔϧ্ ίϯηϓτ ϓϦϓϩμΫγϣϯ ڥ໨͕͋ΔΑ͏ʹݟ͑Δ ϓϩμΫγϣϯ ϙετ  ϓϩμΫγϣϯ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ݱ࣮ͷਐḿ ܾఆ ະܾఆ Ծܾఆ ະܾఆ ܾఆ ࣮ࡍͷ։ൃʹ͸ͦ͜·Ͱ໌֬ͳڥ໨͸ͳ͍ ࣮૷ࡁΈ Ծ࣮૷ ະܾఆ ࣮૷ࡁΈ ࣮૷ࡁΈ ܾఆ ະܾఆ Ծܾఆ

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·ͱΊ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE มԽʹରԠ͢Δٕज़ ͦΕ͕໘ന͞ʹۙͮͨ͘Ίʹ Ͳ͏ͯ͠΋ඞཁͳ͜ͱ

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ଈͪͦΕ͕ɹ  ٕज़͕ͳ͚Ε͹  ໘ന͍΋ͷ͕ ૑Εͳ͍ཧ༝

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$PQZSJHIU%&-J()5803,4*OD"MM3JHIUT3FTFSWFE ͝੩ௌ͋Γ͕ͱ͏͟͝·ͨ͠