Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
C Lecture 2013.09.19
Search
masawada
September 19, 2013
Technology
0
140
C Lecture 2013.09.19
masawada
September 19, 2013
Tweet
Share
More Decks by masawada
See All by masawada
よりよいレビュー環境を求めて / A code review odyssey
masawada
0
2.8k
フロントエンドの秩序は保たれているか?
masawada
0
3.9k
Getting Started with ScratchX
masawada
0
620
GyaPC::Asia Tokyo 2015 LT
masawada
0
1.4k
Privileged Apps with Vue.js
masawada
0
150
Chikubeam
masawada
1
1.4k
Git講習 2014.04.15
masawada
1
300
Hack U at UEC 2014.03.27
masawada
0
1.4k
Firefox OS勉強会 4th Untitled
masawada
0
1.1k
Other Decks in Technology
See All in Technology
KubeCon EU 2024 Recap “Kubernetes Policy Time Machine: Where to Next?”
ryysud
0
200
継続的な改善 x ⾮連続的な進化
sansantech
PRO
3
140
MLOpsの「壁」を乗り越える、LINEヤフーの Data Quality as Code
lycorptech_jp
PRO
5
440
TechFeed Experts Night#27 〜 フロントエンドフレームワーク最前線 (Svelte)
baseballyama
1
330
MySQL の SQL クエリチューニングの要所を掴む勉強会
andpad
2
6.1k
JAWS-UG Bedrock Claude Night
yamahiro
3
550
VS CodeでAWSを操作しよう
smt7174
7
1.6k
オーナーシップを持つ領域を明確にする
konifar
13
3.1k
エンジニア候補者向け資料2024.04.24.pdf
macloud
0
3.3k
FrontDoorとWebAppsを組み合わせた際のリダイレクト処理の注意点
kenichirokimura
1
500
どうするコスト最適化のトレードオフ
tetsuyaooooo
1
500
Vertex AI を中心に 生成AIのアップデートを共有します
kaz1437
0
290
Featured
See All Featured
A designer walks into a library…
pauljervisheath
200
23k
Gamification - CAS2011
davidbonilla
76
4.6k
Principles of Awesome APIs and How to Build Them.
keavy
121
16k
Intergalactic Javascript Robots from Outer Space
tanoku
266
26k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
17
1.4k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
25
2.3k
Reflections from 52 weeks, 52 projects
jeffersonlam
345
19k
GitHub's CSS Performance
jonrohan
1025
450k
The Power of CSS Pseudo Elements
geoffreycrofte
60
5k
Creatively Recalculating Your Daily Design Routine
revolveconf
210
11k
The Language of Interfaces
destraynor
151
23k
The Straight Up "How To Draw Better" Workshop
denniskardys
227
130k
Transcript
ϓϩάϥϛϯάߨश 2013.09.19 by @masawada, @alstamber
Έͳ͞Μ ͓Α͏͍͟͝·͢
ߨࢣ
masawada
alstamber
ΑΖ͓͘͠ئ͍͠·͢
None
ॾ࿈བྷ
• ձ͕12:00·Ͱ͔͑͠·ͤΜ • MMAͷΠϕϯτͰͳ͍ͨΊڭࣨͱΕͣ • ۭ͍ͯͨΒ13:00-15:00͕ͱΕ·͢ • னٳܜΛ12:00-13:00Ͱ͞Έ·͢
• ৯ਆʹ͍͖·͢(ଟ) • ॏཁͳ෦12:00·ͰʹऴΘΒͤ·͢ • 13:00͔ΒΛղ͖·͢ • ͍ΘΏΔԋश • ్தୀࣨՄͰ͢
• શһ͍ͳ͘ͳͬͨΒΊ·͢ • ॾҙ͍Ͱ͢Ͷ • ͜Μͳײ͡ͰਐΊ·͢ • Θ͔Βͳ͍͜ͱ͋ͬͨΒਵ࣭࣌Λ ͱ͍ͯͩ͘͠͞
ߨशͷର
ޙظ͔Β ϓϩάϥϛϯά௨ ͕࢝·Δ
ϓϩάϥϛϯά Α͘Θ͔ΒΜ
͍ͬͯ͏ਓ͚
ܭࢉػ௨ ͱͬͯͳ͍ͻͱ͚
ຊͷత
ޙظͷतۀʹ ͑͏ΔࣝΛ͚ͭΔ
None
ຊͷ͓͠ͳ͕͖ • ϓϩάϥϛϯάͱ • Cͷجૅ • ม • ੍ޚߏจ •
ྻ/ߏମ • ϙΠϯλ • ؔ • ԋश
ϓϩάϥϛϯάͱ
Scratch
͜Ε ϓϩάϥϛϯά
ͻͱͱ͓Γͷཧղ
•ม/ྻ •੍ޚߏจ •ؔ
+ ݴޠಛ༗ͷػೳ
•ϙΠϯλ •ߏମ
ͦͦͳΜͰ CΛษڧ͢Δͷʁ
Rubyͱ͔Pythonͱ͔ φ͍ݴޠΓ͍ͨ
౦େͩͬͯΞϧΰͰ RubyͬͯΔ͡ΌΜ
•×ίϯϐϡʔλΛಈ͔͢ •◦ίϯϐϡʔλΛཧղ͢Δ
None
ܭࢉػͷΈΛ ཧղ͢Δ
ਖ਼ͦ͜·Ͱ ਂ͘Βͳͯ͘Α͍
• ϓϩάϥϛϯάݴޠҰൠͷߟ͑ํ • Cݴޠಛ༗ͷॻ͖ํ • ͱ͔Λ͞ΒͬͱΓ·͢
Cݴޠͷجૅ
•ίʔυΛॻ͘ •ίϯύΠϧ͢Δ •࣮ߦ͢Δ Cݴޠͷجૅ
$ emacs hello.c --- #include <stdio.h> int main() { printf(“Hello,
world!\n”); return 0; }
$ gcc hello.c -o hello $ ./hello Hello, world!
#include <stdio.h> int main() { printf(“Hello, world!\n”); return 0; }
࣮ͳͯ͘ྑ͍
stdio.h = st(andar)d I(n/)O(ut).h(eader)
ඪ४ೖग़ྗ
•printf •scanf
#include <stdio.h> int main() { printf(“Hello, world!\n”); return 0; }
#include <stdio.h> int main() { printf(“Hello, world!\n”); return 0; }
#include <stdio.h> int main() { printf(“Hello, world!\n”); return 0; }
$ gcc hello.c -o hello ɹ
$ [gcc] hello.c -o hello ίϯύΠϧ༻ίϚϯυ
$ gcc [hello.c] -o hello ίϯύΠϧ͢Διʔείʔυ
$ gcc hello.c [-o] hello outfile Φϓγϣϯ
$ gcc hello.c -o [hello] ϑΝΠϧ໊
$ ./hello Hello, World
Ҏ্ɺCͷجૅ
มͷ
ͻͱͱ͓Γͷཧղ
•ม/ྻ •੍ޚߏจ •ؔ
+ ݴޠಛ༗ͷػೳ
•ϙΠϯλ •ߏମ
• ใͷอଘํ๏(σʔλߏ) • ੍ޚ/ؔ
• ใͷอଘ(σʔλߏ) • มɺྻɺ(ϙΠϯλ)ɺߏମ • ੍ޚ/ؔ • ੍ޚߏจɺؔ
ม
x = 10 y = 20
int x = 10; int y = 20;
ܭࢉػ
ON 1 OFF 0
0100101001010100...
None
•int •float, double ුಈখ(খ) •char จࣈ
• ม: 1ͭͷσʔλΛอଘ͢Δͷ • ≒σʔλʹ໊લΛ͚͓ͯ࣋ͬͯ͘ • ܕσʔλͷछྨΛද͢ ·ͱΊ
੍ޚߏจͷ
ϓϩάϥϜ্͔Β ॱ൪ʹॲཧ
ॱ൪Λม͍͑ͨʂ
ൺֱԋࢉࢠ
<ͱ͔>ͱ͔==ͱ͔
ࢄֶ
a b a < b 0 0 0 0 1
1 1 0 0 1 1 0
0ͳΒِ 0Ҏ֎ͳΒਅ
੍ޚߏจ
•if - else - ݅Ͱذ •while - ಉ͡ॲཧΛ·ͱΊΔ •for -
whileͷ্Ґ൛
if - else
͠ʙͳΒ Ͱͳ͚Ε
aͱbͰେ͖͍ํΛ ग़ྗ͍ͨ͠
int a = 10; int b = 20; if (
a < b ) { printf(“%d\n”, b); } else { printf(“%d\n”, a); }
int a = 10; int b = 20; if (
a > b ) { printf(“%d\n”, b); } else { printf(“%d\n”, a); }
while
ʙͷؒ
10͔Β1·Ͱ Χϯτμϯ͍ͨ͠
int i = 10; printf(“%d\n”, i); i = i -
1; printf(“%d\n”, i); i = i - 1; ...
10 9 8 7 6 5 4 3 2 1
i = i - 1;
int i = 10; // i: 10 int tmp =
i - 1; // i: 10 i = tmp; // i: 9
int i = 10; printf(“%d\n”, i); i = i -
1; printf(“%d\n”, i); i = i - 1; ...
int i = 10; while ( 0 < i )
{ printf(“%d\n”, i); i = i - 1; }
for
whileͷ্Ґ൛
int i = 10; while ( 0 < i )
{ printf(“%d\n”, i); i = i - 1; }
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); }
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); }
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); }
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2 1
int i; for (i = 10; 0 < i; i
= i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2 1
·ͱΊ • ॲཧͷॱ൪Λม͑Δͷʹ੍ޚจΛ͏ • ݅Ͱذ͢Δ • ifͱ͔whileͱ͔͍Ζ͍Ζ͋Δ • forwhileͷ্Ґ൛Έ͍ͨͳײ͡
·ͱΊ • ଞʹdo-whileͱ͔switchͱ͔͋Δ • άάͬͯ(͋Μ·ΓΘͳ͍ؾ͕͢Δ)
None
ྻͷ
ม·ͱΊͨͭ
ม·ͱΊͯ ࣈॱʹͳΒͨͭ
a͞ΜͷମॏΛ ྸॱʹه͍ͨ͠
int a0 = 3; ... int a6 = 22; int
a7 = 24; int a8 = 27;
໊લ͚Δͷ͕ ͱͯΊΜͲ͍͘͞
int a[100]; a[0] = 3; ... a[6] = 22; a[7]
= 24; a[8] = 27;
ศརʂʂʂ
int a[100]; ܕ ྻ໊[ ֬อ͢Δ ]; a[0] = 3; ྻ໊[
ఴࣈ ] = ;
จࣈ char
จࣈྻ char[]
char name[8] = “haru067”;
ཉ͍͠จࣈ+1 Ͱ֬อ
char name[8] = “haru067”;
char name[8] = “haru067\0”;
• ྻΛ͏ͱมΛ·ͱΊΒΕΔ • จࣈྻจࣈܕ(char)ͷྻ ·ͱΊ
ߏମͷ
ߏମ දͷΑ͏ͳͷ
ͪΐͬͱ͚ͩ ྻʹࣅͯΔ
໊લ ྸ ମॏ Ұ 19 165 59 ೋ 20
172 64 ࡾ 21 183 72 ࢛ 16 159 53
struct brother { int age; double height; double weight; };
// ηϛίϩϯΘ͢Εͣʹ
struct brother ichiro; ichiro.age = 19; ichiro.height = 165; ichiro.weight
= 59; printf(“%d\n”, ichiro.age); // 19
struct brother ichiro; ichiro.age = 19; ichiro.height = 165; ichiro.weight
= 59; printf(“%d\n”, ichiro.age); // 19
brother ichiro; ichiro.age = 19; ichiro.height = 165; ichiro.weight =
59; printf(“%d\n”, ichiro.age); // 19
͍͍ͪͪstructॻ͘ͷ ΊΜͲ͏
ܕͷΑ͏ʹѻ͍͍ͨ
struct brother { char name[20]; int age; double height; double
weight; };
typedef struct { char name[20]; int age; double height; double
weight; } brother;
·ͱΊ • ߏମؔ࿈͢ΔσʔλΛ·ͱΊΔ • දΈ͍ͨͳײ͡ • ޙظͷߨٛͰׂͱॏཁͬΆ͍
ؔͷ
None
ؔ
f(x) = x * x
͍͍ͩͨ͋ͬͯΔ
int sq (int num) { return num * num; }
int main(){ int a = 3; printf(“%d\n”, sq(a)); return 0; }
Math: f(x) = x * x C: int sq (int
num) { return num * num; }
Math: f(x) = x * x C: int sq (int
num) { return num * num; }
Math: f(x) = x * x C: int sq (int
num) { return num * num; }
Math: f(x) = x * x C: int sq (int
num) { return num * num; }
Math: f(x) = x * x C: int sq (int
num) { return num * num; }
int sq (int num) { return num * num; }
ܕ ໊ؔ ( ܕ Ҿ ) { ॲཧ ؔͷܕʹ߹ͬͨฦΓ }
int sq (int num) { return num * num; }
ܕ ໊ؔ ( ܕ Ҿ, ܕ Ҿ ) { ॲཧ ؔͷܕʹ߹ͬͨฦΓ }
int sq (int num) { return num * num; }
int main(){ int a = 3; printf(“%d\n”, sq(a)); return 0; }
f(x) = x * x b = 3 f(b) =
9
ҾपΓͰ Ή͜ͱͳ͍
ฦΓ
ϙΠϯλ
None
ϙΠϯλ”ࢀর”
• มͷ”ॴ(ΞυϨε)”ΛೖΕΔม • ม: ࣗൢػͷ্ͷϘλϯ • ϙΠϯλม: ࣗൢػͷԼͷϘλϯ ্ͷϘλϯͷ”ॴ”Λ֮͑Δ ͭ·Γɺ”த”Λ֮͑ΔͷͰͳ͍
ϙΠϯλ
// ϙΠϯλͷએݴ // “ॴ”ΛೖΕΔม int *b_button;
// ϙΠϯλͷએݴ // “ॴ”ΛೖΕΔม int *b_button; b_button = &button; //
&มͷ”ॴ”Λࣔ͢
// ϙΠϯλͷએݴ // “ॴ”ΛೖΕΔม int *b_button; b_button = &button; button
= 1;
// ϙΠϯλͷએݴ // “ॴ”ΛೖΕΔม int *b_button; b_button = &button; button
= 1; printf(“%d\n”, *b_button); // 1
ϙΠϯλ”ࢀর”
ϙΠϯλࢦఆ͞Εͨ ॴͷมͷΛݟʹߦ͘
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);
·ͱΊ • ಉ͡ॲཧΛผͷॴͰߦ͍ͬͯΔͱ͖ ؔʹ·ͱΊΔͱݟ௨͕͠Α͘ͳΔ • ฦΓ͕ෳͩͬͨΓɺྻͷ߹ ϙΠϯλΛ͏
·ͱΊ • ϙΠϯλࢀর