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文字コード is なに? What is a character code?

Takafumi Omuro
August 08, 2019

文字コード is なに? What is a character code?

Takafumi Omuro

August 08, 2019
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  1. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࣗݾ঺հ w ໊લɿখࣨو࢙ʢΦϜϩλΧϑϛʣɹɹɹ w ॴଐɿגࣜձࣾϞϦαϫ
 ɹɹɹجװϏδωε෦໳1'։ൃ෦
 ɹɹɹ1'։ൃ՝୲౰՝௕ w झຯɿόΠΫʢ:;'3ॴ༗ʣ


    ɹɹɹ57ήʔϜʢϞϯϋϯɺεϓϥτΡʔϯʣ w ޷͖ͳॻମɿϑΥʔΫ w ໔੹ࣄ߲ɿਖ਼͍͠಺༰Λ৺͕͚·͕ͨ͠ࢿྉʹؒҧ͍͕͋Ε͹
 ɹɹɹɹɹখࣨݸਓͷ੹೚Ͱ͢
 ɹɹɹɹɹهࡌΛ୯७ʹ͢ΔͨΊʹ؆ུԽͯ͠ΔՕॴ΋͋Γ·͢
  2. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυJTͳʹʁ w ϓϩάϥϚͷͨΊͷจࣈίʔυٕज़ೖ໳
 ໼໺ܒհ ϓϩάϥϚͷͨΊͷจࣈίʔυٕज़ೖ໳ ٕज़ධ࿦ࣾ  1 จࣈίʔυͱϑΥϯτ

    จࣈίʔυʹ͍ͭͯͷ࠷΋ૉ๿ͳཧղ͸ɺจࣈͷͦ ΕͧΕʹ൪߸͕ৼΒΕ͍ͯͯɺίϯϐϡʔλͷ಺෦ Ͱ͸ͦͷ൪߸Λॲཧ͍ͯ͠Δ΋ͷͩͱ͍͏΋ͷͰ ͠ΐ͏ɻ
  3. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE ූ߸Խจࣈू߹ +*4׽ࣈ w +*49 w +*4ୈਫ४ w +*49 w

    +*4ୈਫ४ɺ+*4ͱ΋ݺ͹ΕΔ w ࣈମͷมߋ͕൐ͬͨ w 8JOEPXT7JTUBͰ࿩୊ʹ w ϞϦαϫͷ/ॻମ͸ͬͪ͜ ۟఺
 ͲͪΒ΋ಉ͡
 ූ߸ʹͳΔ
  4. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࣈܗͱࣈମ ҙຯ͕ҧ͏ w ࣈܗ w ݸผ۩ମతͳ΋ͷ w ࣮ࡍʹखॻ͖Ͱॻ͍ͨࣈ w

    ಛఆͷϑΥϯτ಺෦ͷࣈ w ࣈମ w ந৅తͳ΋ͷ w ࡉ෦Λແࢹͨ͠ࠎ૊Έͱͯ͠ͷܗ
  5. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ จࣈͷू߹ʹ൪߸Λৼͬͨʢූ߸Խͨ͠ʣ΋ͷΛ
 ࣮ࡍʹίϯϐϡʔλ͕ར༻Ͱ͖Δσʔλྻʹม׵ ͍͋͏͓͑
 ͔͖͚͘͜
    

    " # % '   &&&&&" &#&%&'&& w ςΩετΤϯίʔσΟϯά w ΤϯίʔσΟϯά w จࣈΤϯίʔυ ͳͲͱݺ͹ΕͨΓͯ͠·͢
  6. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ จࣈͷू߹ʹ൪߸Λৼͬͨʢූ߸Խͨ͠ʣ΋ͷΛ
 ࣮ࡍʹίϯϐϡʔλ͕ར༻Ͱ͖Δσʔλྻʹม׵ ͍͋͏͓͑
 ͔͖͚͘͜
    

    " # % '   &&&&&" &#&%&'&& ίϯϐϡʔλ͸ɺσʔλྻΛ #ZUF CJU ୯ҐͰѻ͍·͢
 ʢ#ZUFCJUͰ͸ͳ͍ྫ֎΋͋Γ·͢ʣ
  7. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ "4$** w CJUͰූ߸Խ w YʙY' w #ZUFʹऩ·ΔͷͰͦͷ··ѻ͑Δ w

    #ZUFจࣈͱ΋ݺ͹ΕͨΓ͠·͢ w ଞͷූ߸Խจࣈू߹΋Y'·Ͱ͸ɺ"4$**ͱࣈମΛ߹Θ ͤΔ͜ͱ͕ଟ͍ w ͍ΘΏΔ"4$**ޓ׵
  8. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ 4IJGU@+*4 w +*4ن֨Λූ߸Խ͢Δํࣜ w จࣈΛ#ZUFʙ#ZUFͰදݱ w YʙY&͸#ZUFͰ"4$**จࣈͱڞ௨ʢ"4$**ޓ׵ʣ w

    Y"ʙY%'͸#ZUFͰ൒֯ΧλΧφ w ൒֯ΧλΧφ͕#ZUFจࣈͱݺͿཁҼ w YʙY'ɺY&ʙY&'ͳͲ͸ɺ#ZUFͰར༻ w ೔ຊޠʢͻΒ͕ͳ׽ࣈʣΛ#ZUFจࣈͱݺͿཁҼ
  9. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ 65' 65' 65' w 6OJDPEFΛූ߸Խ͢Δํࣜ w 65' w

    จࣈΛ#ZUFʙ#ZUFͰදݱ w 65' w จࣈΛجຊతʹ#ZUFͰදݱ w 65' w จࣈΛ#ZUFͰදݱ
  10. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE "NFSJDBO/BUJPOBM4UBOEBSET*OTUJUVUF ʢถࠃࠃՈن֨ڠձʣͷུ
 ೔ຊͷ+*4ʹ౰ͨΔࠃՈن֨ ࠓ೔ͷΰʔϧ w վΊͯ8JOEPXTͷϝϞாͷʮจࣈίʔυʯΛݟͯΈΔ w "/4* w

    6OJDPEF w 6OJDPEFCJHFOEJBO w 65' ʊਓਓਓਓਓਓਓਓਓਓਓਓਓਓਓਓʊ ʼɹ΋͸΍จࣈίʔυͱ͸ؔ܎ͳ͍ɹʻ ʉ:?:?:?:?:?:?:?:?:?:?:?:ʉ
  11. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࠓ೔ͷΰʔϧ w ੔ཧͯ͠Έͨ ූ߸Խจࣈू߹ จࣈූ߸Խํࣜ #ZUF0SEFS "/4* +*4ن֨ϕʔε
 ʢ.4֦ுʣ

    4IJGU@+*4
 $1 ʔ 6OJDPEF 6OJDPEF 65' -& 6OJDPEF
 CJHFOEJBO 6OJDPEF 65' #& 65' 6OJDPEF 65' ʔ
  12. $PQZSJHIU˜.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࠓ೔ͷΰʔϧ w ੔ཧͯ͠Έͨ ූ߸Խจࣈू߹ จࣈූ߸Խํࣜ #ZUF0SEFS "/4* +*4ن֨ϕʔε
 ʢ.4֦ுʣ

    4IJGU@+*4
 $1 ʔ 6OJDPEF 6OJDPEF 65' -& 6OJDPEF
 CJHFOEJBO 6OJDPEF 65' #& 65' 6OJDPEF 65' ʔ ೔ຊ΁ϩʔΧϥΠζΛ͢Δ ͱ͖ʹɺ+*4ͱ͢Ε͹·ͩ Θ͔Γ΍͔ͬͨ͢ͷʹʜ