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ϓϩάϥϛϯάߨश 2013.09.19 by @masawada, @alstamber
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Έͳ͞Μ ͓Α͏͍͟͝·͢
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ߨࢣ
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masawada
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alstamber
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ΑΖ͓͘͠ئ͍͠·͢
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ॾ࿈བྷ
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• ձ͕12:00·Ͱ͔͑͠·ͤΜ • MMAͷΠϕϯτͰͳ͍ͨΊڭࣨͱΕͣ • ۭ͍ͯͨΒ13:00-15:00͕ͱΕ·͢ • னٳܜΛ12:00-13:00Ͱ͞Έ·͢
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• ৯ਆʹ͍͖·͢(ଟ) • ॏཁͳ෦12:00·ͰʹऴΘΒͤ·͢ • 13:00͔ΒΛղ͖·͢ • ͍ΘΏΔԋश • ్தୀࣨՄͰ͢
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• શһ͍ͳ͘ͳͬͨΒΊ·͢ • ॾҙ͍Ͱ͢Ͷ • ͜Μͳײ͡ͰਐΊ·͢ • Θ͔Βͳ͍͜ͱ͋ͬͨΒਵ࣭࣌Λ ͱ͍ͯͩ͘͠͞
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ߨशͷର
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ޙظ͔Β ϓϩάϥϛϯά௨ ͕࢝·Δ
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ϓϩάϥϛϯά Α͘Θ͔ΒΜ
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͍ͬͯ͏ਓ͚
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ܭࢉػ௨ ͱͬͯͳ͍ͻͱ͚
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ຊͷత
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ޙظͷतۀʹ ͑͏ΔࣝΛ͚ͭΔ
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ຊͷ͓͠ͳ͕͖ • ϓϩάϥϛϯάͱ • Cͷجૅ • ม • ੍ޚߏจ • ྻ/ߏମ • ϙΠϯλ • ؔ • ԋश
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ϓϩάϥϛϯάͱ
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Scratch
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͜Ε ϓϩάϥϛϯά
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ͻͱͱ͓Γͷཧղ
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•ม/ྻ •੍ޚߏจ •ؔ
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+ ݴޠಛ༗ͷػೳ
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•ϙΠϯλ •ߏମ
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ͦͦͳΜͰ CΛษڧ͢Δͷʁ
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Rubyͱ͔Pythonͱ͔ φ͍ݴޠΓ͍ͨ
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౦େͩͬͯΞϧΰͰ RubyͬͯΔ͡ΌΜ
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•×ίϯϐϡʔλΛಈ͔͢ •○ίϯϐϡʔλΛཧղ͢Δ
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No content
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ܭࢉػͷΈΛ ཧղ͢Δ
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ਖ਼ͦ͜·Ͱ ਂ͘Βͳͯ͘Α͍
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• ϓϩάϥϛϯάݴޠҰൠͷߟ͑ํ • Cݴޠಛ༗ͷॻ͖ํ • ͱ͔Λ͞ΒͬͱΓ·͢
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Cݴޠͷجૅ
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•ίʔυΛॻ͘ •ίϯύΠϧ͢Δ •࣮ߦ͢Δ Cݴޠͷجૅ
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$ emacs hello.c --- #include int main() { printf(“Hello, world!\n”); return 0; }
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$ gcc hello.c -o hello $ ./hello Hello, world!
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#include int main() { printf(“Hello, world!\n”); return 0; }
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࣮ͳͯ͘ྑ͍
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stdio.h = st(andar)d I(n/)O(ut).h(eader)
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ඪ४ೖग़ྗ
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•printf •scanf
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#include int main() { printf(“Hello, world!\n”); return 0; }
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#include int main() { printf(“Hello, world!\n”); return 0; }
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#include int main() { printf(“Hello, world!\n”); return 0; }
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$ gcc hello.c -o hello ɹ
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$ [gcc] hello.c -o hello ίϯύΠϧ༻ίϚϯυ
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$ gcc [hello.c] -o hello ίϯύΠϧ͢Διʔείʔυ
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$ gcc hello.c [-o] hello outfile Φϓγϣϯ
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$ gcc hello.c -o [hello] ϑΝΠϧ໊
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$ ./hello Hello, World
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Ҏ্ɺCͷجૅ
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มͷ
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ͻͱͱ͓Γͷཧղ
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•ม/ྻ •੍ޚߏจ •ؔ
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+ ݴޠಛ༗ͷػೳ
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•ϙΠϯλ •ߏମ
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• ใͷอଘํ๏(σʔλߏ) • ੍ޚ/ؔ
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• ใͷอଘ(σʔλߏ) • มɺྻɺ(ϙΠϯλ)ɺߏମ • ੍ޚ/ؔ • ੍ޚߏจɺؔ
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ม
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x = 10 y = 20
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int x = 10; int y = 20;
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ܭࢉػ
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ON 1 OFF 0
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0100101001010100...
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•int •float, double ුಈখ(খ) •char จࣈ
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• ม: 1ͭͷσʔλΛอଘ͢Δͷ • ≒σʔλʹ໊લΛ͚͓ͯ࣋ͬͯ͘ • ܕσʔλͷछྨΛද͢ ·ͱΊ
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੍ޚߏจͷ
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ϓϩάϥϜ্͔Β ॱ൪ʹॲཧ
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ॱ൪Λม͍͑ͨʂ
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ൺֱԋࢉࢠ
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<ͱ͔>ͱ͔==ͱ͔
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ࢄֶ
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a b a < b 0 0 0 0 1 1 1 0 0 1 1 0
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0ͳΒِ 0Ҏ֎ͳΒਅ
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੍ޚߏจ
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•if - else - ݅Ͱذ •while - ಉ͡ॲཧΛ·ͱΊΔ •for - whileͷ্Ґ൛
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if - else
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͠ʙͳΒ Ͱͳ͚Ε
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aͱbͰେ͖͍ํΛ ग़ྗ͍ͨ͠
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int a = 10; int b = 20; if ( a < b ) { printf(“%d\n”, b); } else { printf(“%d\n”, a); }
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int a = 10; int b = 20; if ( a > b ) { printf(“%d\n”, b); } else { printf(“%d\n”, a); }
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while
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ʙͷؒ
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10͔Β1·Ͱ Χϯτμϯ͍ͨ͠
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int i = 10; printf(“%d\n”, i); i = i - 1; printf(“%d\n”, i); i = i - 1; ...
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10 9 8 7 6 5 4 3 2 1
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i = i - 1;
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int i = 10; // i: 10 int tmp = i - 1; // i: 10 i = tmp; // i: 9
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int i = 10; printf(“%d\n”, i); i = i - 1; printf(“%d\n”, i); i = i - 1; ...
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int i = 10; while ( 0 < i ) { printf(“%d\n”, i); i = i - 1; }
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for
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whileͷ্Ґ൛
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int i = 10; while ( 0 < i ) { printf(“%d\n”, i); i = i - 1; }
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); }
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); }
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); }
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2 1
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int i; for (i = 10; 0 < i; i = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2 1
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·ͱΊ • ॲཧͷॱ൪Λม͑Δͷʹ੍ޚจΛ͏ • ݅Ͱذ͢Δ • ifͱ͔whileͱ͔͍Ζ͍Ζ͋Δ • forwhileͷ্Ґ൛Έ͍ͨͳײ͡
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·ͱΊ • ଞʹdo-whileͱ͔switchͱ͔͋Δ • άάͬͯ(͋Μ·ΓΘͳ͍ؾ͕͢Δ)
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No content
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ྻͷ
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ม·ͱΊͨͭ
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ม·ͱΊͯ ࣈॱʹͳΒͨͭ
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a͞ΜͷମॏΛ ྸॱʹه͍ͨ͠
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int a0 = 3; ... int a6 = 22; int a7 = 24; int a8 = 27;
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໊લ͚Δͷ͕ ͱͯΊΜͲ͍͘͞
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int a[100]; a[0] = 3; ... a[6] = 22; a[7] = 24; a[8] = 27;
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ศརʂʂʂ
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int a[100]; ܕ ྻ໊[ ֬อ͢Δ ]; a[0] = 3; ྻ໊[ ఴࣈ ] = ;
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จࣈ char
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จࣈྻ char[]
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char name[8] = “haru067”;
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ཉ͍͠จࣈ+1 Ͱ֬อ
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char name[8] = “haru067”;
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char name[8] = “haru067\0”;
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• ྻΛ͏ͱมΛ·ͱΊΒΕΔ • จࣈྻจࣈܕ(char)ͷྻ ·ͱΊ
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ߏମͷ
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ߏମ දͷΑ͏ͳͷ
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ͪΐͬͱ͚ͩ ྻʹࣅͯΔ
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໊લ ྸ ମॏ Ұ 19 165 59 ೋ 20 172 64 ࡾ 21 183 72 ࢛ 16 159 53
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struct brother { int age; double height; double weight; }; // ηϛίϩϯΘ͢Εͣʹ
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struct brother ichiro; ichiro.age = 19; ichiro.height = 165; ichiro.weight = 59; printf(“%d\n”, ichiro.age); // 19
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struct brother ichiro; ichiro.age = 19; ichiro.height = 165; ichiro.weight = 59; printf(“%d\n”, ichiro.age); // 19
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brother ichiro; ichiro.age = 19; ichiro.height = 165; ichiro.weight = 59; printf(“%d\n”, ichiro.age); // 19
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͍͍ͪͪstructॻ͘ͷ ΊΜͲ͏
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ܕͷΑ͏ʹѻ͍͍ͨ
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struct brother { char name[20]; int age; double height; double weight; };
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typedef struct { char name[20]; int age; double height; double weight; } brother;
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·ͱΊ • ߏମؔ࿈͢ΔσʔλΛ·ͱΊΔ • දΈ͍ͨͳײ͡ • ޙظͷߨٛͰׂͱॏཁͬΆ͍
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ؔͷ
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No content
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ؔ
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f(x) = x * x
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͍͍ͩͨ͋ͬͯΔ
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int sq (int num) { return num * num; } int main(){ int a = 3; printf(“%d\n”, sq(a)); return 0; }
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Math: f(x) = x * x C: int sq (int num) { return num * num; }
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Math: f(x) = x * x C: int sq (int num) { return num * num; }
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Math: f(x) = x * x C: int sq (int num) { return num * num; }
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Math: f(x) = x * x C: int sq (int num) { return num * num; }
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Math: f(x) = x * x C: int sq (int num) { return num * num; }
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int sq (int num) { return num * num; } ܕ ໊ؔ ( ܕ Ҿ ) { ॲཧ ؔͷܕʹ߹ͬͨฦΓ }
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int sq (int num) { return num * num; } ܕ ໊ؔ ( ܕ Ҿ, ܕ Ҿ ) { ॲཧ ؔͷܕʹ߹ͬͨฦΓ }
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int sq (int num) { return num * num; } int main(){ int a = 3; printf(“%d\n”, sq(a)); return 0; }
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f(x) = x * x b = 3 f(b) = 9
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ҾपΓͰ Ή͜ͱͳ͍
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ฦΓ
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ϙΠϯλ
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No content
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ϙΠϯλ”ࢀর”
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• มͷ”ॴ(ΞυϨε)”ΛೖΕΔม • ม: ࣗൢػͷ্ͷϘλϯ • ϙΠϯλม: ࣗൢػͷԼͷϘλϯ ্ͷϘλϯͷ”ॴ”Λ֮͑Δ ͭ·Γɺ”த”Λ֮͑ΔͷͰͳ͍ ϙΠϯλ
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// ϙΠϯλͷએݴ // “ॴ”ΛೖΕΔม int *b_button;
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// ϙΠϯλͷએݴ // “ॴ”ΛೖΕΔม int *b_button; b_button = &button; // &มͷ”ॴ”Λࣔ͢
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// ϙΠϯλͷએݴ // “ॴ”ΛೖΕΔม int *b_button; b_button = &button; button = 1;
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// ϙΠϯλͷએݴ // “ॴ”ΛೖΕΔม int *b_button; b_button = &button; button = 1; printf(“%d\n”, *b_button); // 1
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ϙΠϯλ”ࢀর”
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ϙΠϯλࢦఆ͞Εͨ ॴͷมͷΛݟʹߦ͘
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void sq (int *num1, int *num2) { num1 = &a; num2 = &b; *num1 = *num1 * *num1; *num2 = *num2 * *num2; } int main(){ int a = 3, b = 6; sq(&a, &b); printf(“%d, %d\”, a, b);
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·ͱΊ • ಉ͡ॲཧΛผͷॴͰߦ͍ͬͯΔͱ͖ ؔʹ·ͱΊΔͱݟ௨͕͠Α͘ͳΔ • ฦΓ͕ෳͩͬͨΓɺྻͷ߹ ϙΠϯλΛ͏
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·ͱΊ • ϙΠϯλࢀর