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文字コード is なに? What is a character code?
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Takafumi Omuro
August 08, 2019
Design
3
1.6k
文字コード is なに? What is a character code?
Takafumi Omuro
August 08, 2019
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Transcript
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυJTͳʹʁ .JY-FBQ גࣜձࣾϞϦαϫখࣨو࢙ 4IJGU@+*4 65' "4$** +*4ୈਫ४ &6$ 6OJDPEF
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࣗݾհ w ໊લɿখࣨو࢙ʢΦϜϩλΧϑϛʣɹɹɹ w ॴଐɿגࣜձࣾϞϦαϫ ɹɹɹجװϏδωε෦1'։ൃ෦ ɹɹɹ1'։ൃ՝୲՝ w झຯɿόΠΫʢ:;'3ॴ༗ʣ
ɹɹɹ57ήʔϜʢϞϯϋϯɺεϓϥτΡʔϯʣ w ͖ͳॻମɿϑΥʔΫ w ໔ࣄ߲ɿਖ਼͍͠༰Λ৺͕͚·͕ͨ͠ࢿྉʹؒҧ͍͕͋Ε ɹɹɹɹɹখࣨݸਓͷͰ͢ ɹɹɹɹɹهࡌΛ୯७ʹ͢ΔͨΊʹ؆ུԽͯ͠ΔՕॴ͋Γ·͢
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ΞδΣϯμ w จࣈίʔυJTͳʹʁ w จࣈίʔυͱ w ූ߸Խจࣈू߹ w ࣈܗͱࣈମ
w จࣈූ߸Խํࣜ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ऴΘΓͷ࢝·Γ ຊਓͷจࣈίʔυͷࠞཚɺ ϝϞா͔Β࢝·ͬͨʜ ˞ݸਓͷײͰ͢
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࠓͷΰʔϧ w 8JOEPXTͷϝϞாͷʮจࣈίʔυʯ͕ҙຯ͢Δ͜ͱΛཧղ͢Δ w "/4* w 6OJDPEF w 6OJDPEFCJHFOEJBO
w 65'
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυJTͳʹʁ 6OJDPEF 4IJGU@+*4 65' "4$** +*4ୈਫ४ &6$ "/4*
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυJTͳʹʁ w 8JLJQFEJBͷจࣈίʔυ IUUQTKBXJLJQFEJBPSHXJLJจࣈίʔυ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυJTͳʹʁ w 8JLJQFEJBͷจࣈίʔυ IUUQTKBXJLJQFEJBPSHXJLJจࣈίʔυ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυJTͳʹʁ w 8JLJQFEJBͷจࣈίʔυ IUUQTKBXJLJQFEJBPSHXJLJจࣈίʔυ ͭͷҙຯΛ͍࣋ͬͯΔ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυJTͳʹʁ w ϓϩάϥϚͷͨΊͷจࣈίʔυٕज़ೖ ܒհ ϓϩάϥϚͷͨΊͷจࣈίʔυٕज़ೖ ٕज़ධࣾ 1 จࣈίʔυͱϑΥϯτ
จࣈίʔυʹ͍ͭͯͷ࠷ૉͳཧղɺจࣈͷͦ ΕͧΕʹ൪߸͕ৼΒΕ͍ͯͯɺίϯϐϡʔλͷ෦ Ͱͦͷ൪߸Λॲཧ͍ͯ͠Δͷͩͱ͍͏ͷͰ ͠ΐ͏ɻ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυͱ 6OJDPEF 4IJGU@+*4 65' "4$** +*4ୈਫ४ &6$ "/4* ٛͰͷจࣈίʔυ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυͱ 6OJDPEF 4IJGU@+*4 65' "4$** +*4ୈਫ४ &6$ "/4* ڱٛͰͷจࣈίʔυ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυͱ 6OJDPEF 4IJGU@+*4 65' "4$** +*4ୈਫ४ &6$ "/4* จࣈͷͦΕͧΕʹ
൪߸Λৼͬͨͷ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυͱ 6OJDPEF 4IJGU@+*4 65' "4$** +*4ୈਫ४ &6$ "/4* จࣈΛར༻͢Δ
ͨΊͷόΠτදݱ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈίʔυͱ ͭͷҙຯΛ͍࣋ͬͯΔ w จࣈූ߸ԽํࣜʢDIBSBDUFSFODPEJOHTDIFNFʣ ίϯϐϡʔλ্ͰจࣈʢΩϟϥΫλʣΛར༻͢ΔతͰ ֤จࣈʹׂΓͯΒΕΔόΠτදݱ w ූ߸Խจࣈू߹ʢDPEFEDIBSBDUFSTFUʣ όΠτදݱͱจࣈͷରԠؔʢจࣈίʔυମܥʣͷ͜ͱ
جຊతʹͪ͜Β͕จࣈίʔυͱݴΘΕΔ͜ͱ͕ଟ͍ IUUQTKBXJLJQFEJBPSHXJLJจࣈίʔυ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈ ݴ༿ɾݴޠΛୡ͠ه͢ΔͨΊʹ ઢΛͬͯܗ࡞ΒΕͨه߸ ͋ IUUQTKBXJLJQFEJBPSHXJLJจࣈ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈू߹ ͍͋͏͓͑ ͔͖͚͘͜ IUUQTKBXJLJQFEJBPSHXJLJจࣈू߹ จࣈΛͦͷཁૉͱ͢Δू߹
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ූ߸Խจࣈू߹ จࣈͷू߹ʹ൪߸Λৼͬͨʢූ߸Խͨ͠ʣͷ ͍͋͏͓͑ ͔͖͚͘͜ "
# % '
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ූ߸Խจࣈू߹ "4$** w *40*&$ w CJUͰූ߸Խ w ֤ࠃͷ߹ͰจࣈΛมߋͯ͠Α͍ූ߸Ґஔ͕͋Δ w
Y$ʢόοΫεϥογϡʣ w +*49 w *40*&$ͷ+*4ن֨൛ w Y$=ʢԁه߸ʣ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ූ߸Խจࣈू߹ +*4ࣈ w +*49 w +*4ୈਫ४ w +*49 w
+*4ୈਫ४ɺ+*4ͱݺΕΔ w ࣈମͷมߋ͕ͬͨ w 8JOEPXT7JTUBͰʹ w ϞϦαϫͷ/ॻମͬͪ͜ ۟ ͲͪΒಉ͡ ූ߸ʹͳΔ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ූ߸Խจࣈू߹ 6OJDPEF w *40*&$ w ੈքͰΘΕΔશͯͷจࣈΛڞ௨ͷจࣈू߹ʹͯར༻Ͱ ͖ΔΑ͏ʹ͠Α͏ͱ͍͏ເͷΑ͏ͳن֨ w ྫࣈࣈମΛఆΊ͍ͯΔ
w ࣈܗఆΊͯແ͍ w $+,౷߹ࣈͳͲࣈମͷแઁΛೝΊ͍ͯΔ w தؖͷࣈࣅͯΔ͔Βಉ͡ූ߸ΛׂΓৼΕ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ූ߸Խจࣈू߹ 6OJDPEFࠎͷྫ IUUQTHMZQIXJLJPSHXJLJVBB ྫࣈ ؆ମ ൟମ ຊ ؖࠃ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࣈܗͱࣈମ ҙຯ͕ҧ͏ w ࣈܗ w ݸผ۩ମతͳͷ w ࣮ࡍʹखॻ͖Ͱॻ͍ͨࣈ w
ಛఆͷϑΥϯτ෦ͷࣈ w ࣈମ w நతͳͷ w ࡉ෦Λແࢹͨ͠ࠎΈͱͯ͠ͷܗ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࣈܗͱࣈମ 6OJDPEFࠎͷྫ IUUQTHMZQIXJLJPSHXJLJVBB ಉ͡ࣈମ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࣈܗͱࣈମ 6OJDPEFࠎͷྫ IUUQTHMZQIXJLJPSHXJLJVBB ҧ͏ࣈܗ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࣈܗͱࣈମ ໌ேͱΰγοΫ ͋ ͋ ಉ͡ࣈମ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࣈܗͱࣈମ ໌ேͱΰγοΫ ͋ ͋ ҧ͏ࣈܗ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ จࣈͷू߹ʹ൪߸Λৼͬͨʢූ߸Խͨ͠ʣͷΛ ࣮ࡍʹίϯϐϡʔλ͕ར༻Ͱ͖Δσʔλྻʹม ͍͋͏͓͑ ͔͖͚͘͜
" # % '
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ จࣈͷू߹ʹ൪߸Λৼͬͨʢූ߸Խͨ͠ʣͷΛ ࣮ࡍʹίϯϐϡʔλ͕ར༻Ͱ͖Δσʔλྻʹม ͍͋͏͓͑ ͔͖͚͘͜
" # % ' &&&&&" &#&%&'&&
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ จࣈͷू߹ʹ൪߸Λৼͬͨʢූ߸Խͨ͠ʣͷΛ ࣮ࡍʹίϯϐϡʔλ͕ར༻Ͱ͖Δσʔλྻʹม ͍͋͏͓͑ ͔͖͚͘͜
" # % ' &&&&&" &#&%&'&& w ςΩετΤϯίʔσΟϯά w ΤϯίʔσΟϯά w จࣈΤϯίʔυ ͳͲͱݺΕͨΓͯ͠·͢
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ จࣈͷू߹ʹ൪߸Λৼͬͨʢූ߸Խͨ͠ʣͷΛ ࣮ࡍʹίϯϐϡʔλ͕ར༻Ͱ͖Δσʔλྻʹม ͍͋͏͓͑ ͔͖͚͘͜
" # % ' &&&&&" &#&%&'&& ίϯϐϡʔλɺσʔλྻΛ #ZUF CJU ୯ҐͰѻ͍·͢ ʢ#ZUFCJUͰͳ͍ྫ֎͋Γ·͢ʣ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ 4BGBSJͷϝχϡʔ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ "4$** w CJUͰූ߸Խ w YʙY' w #ZUFʹऩ·ΔͷͰͦͷ··ѻ͑Δ w
#ZUFจࣈͱݺΕͨΓ͠·͢ w ଞͷූ߸Խจࣈू߹Y'·Ͱɺ"4$**ͱࣈମΛ߹Θ ͤΔ͜ͱ͕ଟ͍ w ͍ΘΏΔ"4$**ޓ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ 4IJGU@+*4 w +*4ن֨Λූ߸Խ͢Δํࣜ w จࣈΛ#ZUFʙ#ZUFͰදݱ w YʙY&#ZUFͰ"4$**จࣈͱڞ௨ʢ"4$**ޓʣ w
Y"ʙY%'#ZUFͰ֯ΧλΧφ w ֯ΧλΧφ͕#ZUFจࣈͱݺͿཁҼ w YʙY'ɺY&ʙY&'ͳͲɺ#ZUFͰར༻ w ຊޠʢͻΒ͕ͳࣈʣΛ#ZUFจࣈͱݺͿཁҼ
$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
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ 65' w จࣈΛ#ZUFʙ#ZUFͷՄมͰදݱ w CJU·Ͱ"4$**ͱڞ௨Ͱɺ#ZUFͰදݱʢ"4$**ޓʣ w ຊޠͳͲCJUඞཁͳྖҬɺ#ZUFͰදݱ ͍͋͏͓͑
" &&&&&"
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ 65' w จࣈΛ#ZUFͷݻఆͰදݱʢ"4$**ޓͰͳ͍ʣ w ͨͩ͠#ZUFΛ͑ΔྖҬαϩήʔτϖΞΛར༻ w ͜ͷ߹ɺจࣈ͕#ZUFʹͳΔ w
6OJDPEFະ༻ྖҬͷY%ʙY%#''ͱ Y%$ʙY%'''ΛΈ߹ΘͤͯจࣈΛදݱ w 1(Ͱ୯७ʹจࣈ#ZUFͱ͢ΔͱϛεΔཁҼ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ 65' w όΠτͷฒͼॱʢ#ZUFPSEFSʣΛҙࣝ͢Δඞཁ͋Γ w ԼҐόΠτ͕ઌʹདྷΔέʔεΛ-& -JUUMF&OEJBO ͱݺͿ ͍͋͏͓͑
" "
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE จࣈූ߸Խํࣜ 65' w όΠτͷฒͼॱʢ#ZUFPSEFSʣΛҙࣝ͢Δඞཁ͋Γ w ্ҐόΠτ͕ઌʹདྷΔέʔεΛ#& #JH&OEJBO ͱݺͿ ͍͋͏͓͑
" "
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࠓͷΰʔϧ w վΊͯ8JOEPXTͷϝϞாͷʮจࣈίʔυʯΛݟͯΈΔ w "/4* w 6OJDPEF w 6OJDPEFCJHFOEJBO
w 65'
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࠓͷΰʔϧ w վΊͯ8JOEPXTͷϝϞாͷʮจࣈίʔυʯΛݟͯΈΔ w "/4* w 6OJDPEF w 6OJDPEFCJHFOEJBO
w 65' ͓Θ͔Γ͍͚ͨͩͨͩΖ͏͔
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࠓͷΰʔϧ w վΊͯ8JOEPXTͷϝϞாͷʮจࣈίʔυʯΛݟͯΈΔ w "/4* w 6OJDPEF w 6OJDPEFCJHFOEJBO
w 65' จࣈූ߸Խํࣜ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࠓͷΰʔϧ w վΊͯ8JOEPXTͷϝϞாͷʮจࣈίʔυʯΛݟͯΈΔ w "/4* w 6OJDPEF w 6OJDPEFCJHFOEJBO
w 65' ූ߸Խจࣈू߹ʴ#ZUF0SEFS ූ߸Խจࣈू߹
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࠓͷΰʔϧ w վΊͯ8JOEPXTͷϝϞாͷʮจࣈίʔυʯΛݟͯΈΔ w "/4* w 6OJDPEF w 6OJDPEFCJHFOEJBO
w 65' "NFSJDBO/BUJPOBM4UBOEBSET*OTUJUVUF ʢถࠃࠃՈن֨ڠձʣͷུ ຊͰ͍͏+*4
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE "NFSJDBO/BUJPOBM4UBOEBSET*OTUJUVUF ʢถࠃࠃՈن֨ڠձʣͷུ ຊͷ+*4ʹͨΔࠃՈن֨ ࠓͷΰʔϧ w վΊͯ8JOEPXTͷϝϞாͷʮจࣈίʔυʯΛݟͯΈΔ w "/4* w
6OJDPEF w 6OJDPEFCJHFOEJBO w 65' ʊਓਓਓਓਓਓਓਓਓਓਓਓਓਓਓਓʊ ʼɹจࣈίʔυͱؔͳ͍ɹʻ ʉ:?:?:?:?:?:?:?:?:?:?:?:ʉ
$PQZSJHIU.PSJTBXB*OD"MM3JHIUT3FTFSWFE ࠓͷΰʔϧ w ཧͯ͠Έͨ ූ߸Խจࣈू߹ จࣈූ߸Խํࣜ #ZUF0SEFS "/4* +*4ن֨ϕʔε ʢ.4֦ுʣ
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