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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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• ձ৔͕12:00·Ͱ͔͠࢖͑·ͤΜ • MMAͷΠϕϯτͰ͸ͳ͍ͨΊڭࣨͱΕͣ • ۭ͍ͯͨΒ13:00-15:00͕ͱΕ·͢ • னٳܜΛ12:00-13:00Ͱ͸͞Έ·͢

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• ๻͸৯ਆʹ͍͖·͢(ଟ෼) • ॏཁͳ෦෼͸12:00·ͰʹऴΘΒͤ·͢ • 13:00͔Β͸໰୊Λղ͖·͢ • ͍ΘΏΔԋश • ్தୀࣨՄͰ͢

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• શһ͍ͳ͘ͳͬͨΒ΍Ί·͢ • ॾ஫ҙ௕͍Ͱ͢Ͷ • ͜Μͳײ͡ͰਐΊ·͢ • Θ͔Βͳ͍͜ͱ͋ͬͨΒਵ࣭࣌໰Λ ͱ͹͍ͯͩ͘͠͞

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ߨशͷର৅

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ޙظ͔Β ϓϩάϥϛϯά௨࿦ ͕࢝·Δ

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ϓϩάϥϛϯά Α͘Θ͔ΒΜ

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͍ͬͯ͏ਓ޲͚

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ܭࢉػ௨࿦ ͱͬͯͳ͍ͻͱ޲͚

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ຊ೔ͷ໨త

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ޙظͷतۀʹ ଱͑͏Δ஌ࣝΛ͚ͭΔ

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ຊ೔ͷ͓͠ͳ͕͖ • ϓϩάϥϛϯάͱ͸ • Cͷجૅ • ม਺ • ੍ޚߏจ • ഑ྻ/ߏ଄ମ • 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 •ߏ଄ମ

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ͦ΋ͦ΋ͳΜͰ CΛษڧ͢Δͷʁ

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Rubyͱ͔Pythonͱ͔ φ΢͍ݴޠ΍Γ͍ͨ

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౦େͩͬͯΞϧΰͰ Ruby࢖ͬͯΔ͡ΌΜ

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•×ίϯϐϡʔλΛಈ͔͢ •○ίϯϐϡʔλΛཧղ͢Δ

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ܭࢉػͷ࢓૊ΈΛ ཧղ͢Δ

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ਖ਼௚ͦ͜·Ͱ ਂ͘΍Βͳͯ͘Α͍

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• ϓϩάϥϛϯάݴޠҰൠͷߟ͑ํ • Cݴޠಛ༗ͷॻ͖ํ • ͱ͔Λ͞Βͬͱ΍Γ·͢

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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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࣮͸ͳͯ͘΋ྑ͍

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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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ม਺ͷ࿩

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ͻͱͱ͓Γͷཧղ

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•ม਺/഑ྻ •੍ޚߏจ •ؔ਺

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+ ݴޠಛ༗ͷػೳ

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•ϙΠϯλ •ߏ଄ମ

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• ৘ใͷอଘํ๏(σʔλߏ଄) • ੍ޚ/ؔ਺

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• ৘ใͷอଘ(σʔλߏ଄) • ม਺ɺ഑ྻɺ(ϙΠϯλ)ɺߏ଄ମ • ੍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਺: 1ͭͷσʔλΛอଘ͢Δ΋ͷ • ≒σʔλʹ໊લΛ෇͚͓ͯ࣋ͬͯ͘ • ܕ͸σʔλͷछྨΛද͢ ·ͱΊ

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੍ޚߏจͷ࿩

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ϓϩάϥϜ͸্͔Β ॱ൪ʹॲཧ

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ॱ൪Λม͍͑ͨʂ

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ൺֱԋࢉࢠ

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<ͱ͔>ͱ͔==ͱ͔

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཭ࢄ਺ֶ

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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 - ৚݅Ͱ෼ذ •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 Χ΢ϯτμ΢ϯ͍ͨ͠

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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 • ॲཧͷॱ൪Λม͑Δͷʹ੍ޚจΛ࢖͏ • ৚݅Ͱ෼ذ͢Δ • ifͱ͔whileͱ͔͍Ζ͍Ζ͋Δ • for͸whileͷ্Ґ൛Έ͍ͨͳײ͡

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·ͱΊ • ଞʹ΋do-whileͱ͔switchͱ͔͋Δ • άάͬͯ(͋Μ·Γ࢖Θͳ͍ؾ͕͢Δ)

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No content

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഑ྻͷ࿩

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ม਺·ͱΊͨ΍ͭ

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ม਺·ͱΊͯ ਺ࣈॱʹͳΒ΂ͨ΍ͭ

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a͞ΜͷମॏΛ ೥ྸॱʹه࿥͍ͨ͠

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int a0 = 3; ... int a6 = 22; int a7 = 24; int a8 = 27;

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໊લ෇͚Δͷ͕ ͱͯ΋ΊΜͲ͍͘͞

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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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• ഑ྻΛ࢖͏ͱม਺Λ·ͱΊΒΕΔ • จࣈྻ͸จࣈܕ(char)ͷ഑ྻ ·ͱΊ

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ߏ଄ମͷ࿩

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ߏ଄ମ͸ දͷΑ͏ͳ΋ͷ

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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 • ߏ଄ମ͸ؔ࿈͢ΔσʔλΛ·ͱΊΔ • දΈ͍ͨͳײ͡ • ޙظͷߨٛͰׂͱॏཁͬΆ͍

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ؔ਺ͷ࿩

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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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Ҿ਺पΓͰ ೰Ή͜ͱ͸ͳ͍

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ฦΓ஋

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ϙΠϯλ

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ϙΠϯλ͸”ࢀর”

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• ม਺ͷ”৔ॴ(ΞυϨε)”ΛೖΕΔม਺ • ม਺: ࣗൢػͷ্ͷϘλϯ • ϙΠϯλม਺: ࣗൢػͷԼͷϘλϯ ্ͷϘλϯͷ”৔ॴ”Λ֮͑Δ ͭ·Γɺ”த਎”Λ֮͑ΔͷͰ͸ͳ͍ ϙΠϯλ

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// ϙΠϯλͷએݴ // “৔ॴ”ΛೖΕΔม਺ int *b_button;

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// ϙΠϯλͷએݴ // “৔ॴ”ΛೖΕΔม਺ int *b_button; b_button = &button; // &͸ม਺ͷ”৔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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ϙΠϯλ͸ࢦఆ͞Εͨ ৔ॴͷม਺ͷ஋Λݟʹߦ͘

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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 • ಉ͡ॲཧΛผͷ৔ॴͰߦ͍ͬͯΔͱ͖ ؔ਺ʹ·ͱΊΔͱݟ௨͕͠Α͘ͳΔ • ฦΓ஋͕ෳ਺ͩͬͨΓɺ഑ྻͷ৔߹͸ ϙΠϯλΛ࢖͏

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·ͱΊ • ϙΠϯλ͸ࢀর