C Lecture 2013.09.19

Transcript

1. ϓϩάϥϛϯάߨश 2013.09.19 by @masawada, @alstamber

2. Έͳ͞Μ ͓͸Α͏͍͟͝·͢

3. ߨࢣ

4. masawada

5. alstamber

6. ΑΖ͓͘͠ئ͍͠·͢

7. None

8. ॾ࿈བྷ

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

10. • ๻͸৯ਆʹ͍͖·͢(ଟ෼) • ॏཁͳ෦෼͸12:00·ͰʹऴΘΒͤ·͢ • 13:00͔Β͸໰୊Λղ͖·͢ • ͍ΘΏΔԋश • ్தୀࣨՄͰ͢

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

12. ߨशͷର৅

13. ޙظ͔Β ϓϩάϥϛϯά௨࿦ ͕࢝·Δ

14. ϓϩάϥϛϯά Α͘Θ͔ΒΜ

15. ͍ͬͯ͏ਓ޲͚

16. ܭࢉػ௨࿦ ͱͬͯͳ͍ͻͱ޲͚

17. ຊ೔ͷ໨త

18. ޙظͷतۀʹ ଱͑͏Δ஌ࣝΛ͚ͭΔ

19. None

20. ຊ೔ͷ͓͠ͳ͕͖ • ϓϩάϥϛϯάͱ͸ • Cͷجૅ • ม਺ • ੍ޚߏจ •

    ഑ྻ/ߏ଄ମ • ϙΠϯλ • ؔ਺ • ԋश

21. ϓϩάϥϛϯάͱ͸

22. Scratch

23. ͜Ε΋ ϓϩάϥϛϯά

24. ͻͱͱ͓Γͷཧղ

25. •ม਺/഑ྻ •੍ޚߏจ •ؔ਺

26. + ݴޠಛ༗ͷػೳ

27. •ϙΠϯλ •ߏ଄ମ

28. ͦ΋ͦ΋ͳΜͰ CΛษڧ͢Δͷʁ

29. Rubyͱ͔Pythonͱ͔ φ΢͍ݴޠ΍Γ͍ͨ

30. ౦େͩͬͯΞϧΰͰ Ruby࢖ͬͯΔ͡ΌΜ

31. •×ίϯϐϡʔλΛಈ͔͢ •◦ίϯϐϡʔλΛཧղ͢Δ

32. None

33. ܭࢉػͷ࢓૊ΈΛ ཧղ͢Δ

34. ਖ਼௚ͦ͜·Ͱ ਂ͘΍Βͳͯ͘Α͍

35. • ϓϩάϥϛϯάݴޠҰൠͷߟ͑ํ • Cݴޠಛ༗ͷॻ͖ํ • ͱ͔Λ͞Βͬͱ΍Γ·͢

36. Cݴޠͷجૅ

37. •ίʔυΛॻ͘ •ίϯύΠϧ͢Δ •࣮ߦ͢Δ Cݴޠͷجૅ

38. $ emacs hello.c --- #include <stdio.h> int main() { printf(“Hello,

    world!\n”); return 0; }

39. $ gcc hello.c -o hello $ ./hello Hello, world!

40. #include <stdio.h> int main() { printf(“Hello, world!\n”); return 0; }

41. ࣮͸ͳͯ͘΋ྑ͍

42. stdio.h = st(andar)d I(n/)O(ut).h(eader)

43. ඪ४ೖग़ྗ

44. •printf •scanf

45. #include <stdio.h> int main() { printf(“Hello, world!\n”); return 0; }

46. #include <stdio.h> int main() { printf(“Hello, world!\n”); return 0; }

47. #include <stdio.h> int main() { printf(“Hello, world!\n”); return 0; }

48. $ gcc hello.c -o hello ɹ

49. $ [gcc] hello.c -o hello ίϯύΠϧ༻ίϚϯυ

50. $ gcc [hello.c] -o hello ίϯύΠϧ͢Διʔείʔυ

51. $ gcc hello.c [-o] hello outfile Φϓγϣϯ

52. $ gcc hello.c -o [hello] ϑΝΠϧ໊

53. $ ./hello Hello, World

54. Ҏ্ɺCͷجૅ

55. ม਺ͷ࿩

56. ͻͱͱ͓Γͷཧղ

57. •ม਺/഑ྻ •੍ޚߏจ •ؔ਺

58. + ݴޠಛ༗ͷػೳ

59. •ϙΠϯλ •ߏ଄ମ

60. • ৘ใͷอଘํ๏(σʔλߏ଄) • ੍ޚ/ؔ਺

61. • ৘ใͷอଘ(σʔλߏ଄) • ม਺ɺ഑ྻɺ(ϙΠϯλ)ɺߏ଄ମ • ੍ޚ/ؔ਺ • ੍ޚߏจɺؔ਺

62. ม਺

63. x = 10 y = 20

64. int x = 10; int y = 20;

65. ܭࢉػ

66. ON 1 OFF 0

67. 0100101001010100...

68. None

69. •int ੔਺ •float, double ුಈখ਺఺(খ਺) •char จࣈ

70. • ม਺: 1ͭͷσʔλΛอଘ͢Δ΋ͷ • ≒σʔλʹ໊લΛ෇͚͓ͯ࣋ͬͯ͘ • ܕ͸σʔλͷछྨΛද͢ ·ͱΊ

71. ੍ޚߏจͷ࿩

72. ϓϩάϥϜ͸্͔Β ॱ൪ʹॲཧ

73. ॱ൪Λม͍͑ͨʂ

74. ൺֱԋࢉࢠ

75. <ͱ͔>ͱ͔==ͱ͔

76. ཭ࢄ਺ֶ

77. a b a < b 0 0 0 0 1

    1 1 0 0 1 1 0

78. 0ͳΒِ 0Ҏ֎ͳΒਅ

79. ੍ޚߏจ

80. •if - else - ৚݅Ͱ෼ذ •while - ಉ͡ॲཧΛ·ͱΊΔ •for -

    whileͷ্Ґ൛

81. if - else

82. ΋͠ʙͳΒ Ͱͳ͚Ε͹

83. aͱbͰେ͖͍ํΛ ग़ྗ͍ͨ͠

84. int a = 10; int b = 20; if (

    a < b ) { printf(“%d\n”, b); } else { printf(“%d\n”, a); }

85. int a = 10; int b = 20; if (

    a > b ) { printf(“%d\n”, b); } else { printf(“%d\n”, a); }

86. while

87. ʙͷؒ

88. 10͔Β1·Ͱ Χ΢ϯτμ΢ϯ͍ͨ͠

89. int i = 10; printf(“%d\n”, i); i = i -

    1; printf(“%d\n”, i); i = i - 1; ...

90. 10 9 8 7 6 5 4 3 2 1

91. i = i - 1;

92. int i = 10; // i: 10 int tmp =

    i - 1; // i: 10 i = tmp; // i: 9

93. int i = 10; printf(“%d\n”, i); i = i -

    1; printf(“%d\n”, i); i = i - 1; ...

94. int i = 10; while ( 0 < i )

    { printf(“%d\n”, i); i = i - 1; }

95. for

96. whileͷ্Ґ൛

97. int i = 10; while ( 0 < i )

    { printf(“%d\n”, i); i = i - 1; }

98. int i; for (i = 10; 0 < i; i

    = i - 1) { printf(“%d\n”, i); }

99. int i; for (i = 10; 0 < i; i

    = i - 1) { printf(“%d\n”, i); }

100. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); }

101. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10

102. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10

103. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10

104. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9

105. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9

106. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9

107. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8

108. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8

109. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8

110. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7

111. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7

112. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7

113. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6

114. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6

115. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6

116. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5

117. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5

118. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5

119. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4

120. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4

121. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4

122. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3

123. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3

124. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3

125. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2

126. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2

127. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2

128. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2 1

129. int i; for (i = 10; 0 < i; i

     = i - 1) { printf(“%d\n”, i); } 10 9 8 7 6 5 4 3 2 1

130. ·ͱΊ • ॲཧͷॱ൪Λม͑Δͷʹ੍ޚจΛ࢖͏ • ৚݅Ͱ෼ذ͢Δ • ifͱ͔whileͱ͔͍Ζ͍Ζ͋Δ • for͸whileͷ্Ґ൛Έ͍ͨͳײ͡

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

132. None

133. ഑ྻͷ࿩

134. ม਺·ͱΊͨ΍ͭ

135. ม਺·ͱΊͯ ਺ࣈॱʹͳΒ΂ͨ΍ͭ

136. a͞ΜͷମॏΛ ೥ྸॱʹه࿥͍ͨ͠

137. int a0 = 3; ... int a6 = 22; int

     a7 = 24; int a8 = 27;

138. ໊લ෇͚Δͷ͕ ͱͯ΋ΊΜͲ͍͘͞

139. int a[100]; a[0] = 3; ... a[6] = 22; a[7]

     = 24; a[8] = 27;

140. ศརʂʂʂ

141. int a[100]; ܕ ഑ྻ໊[ ֬อ͢Δ਺ ]; a[0] = 3; ഑ྻ໊[

     ఴࣈ ] = ஋;

142. จࣈ char

143. จࣈྻ char[]

144. char name[8] = “haru067”;

145. ཉ͍͠จࣈ਺+1 Ͱ֬อ

146. char name[8] = “haru067”;

147. char name[8] = “haru067\0”;

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

149. ߏ଄ମͷ࿩

150. ߏ଄ମ͸ දͷΑ͏ͳ΋ͷ

151. ͪΐͬͱ͚ͩ ഑ྻʹࣅͯΔ

152. ໊લ ೥ྸ ਎௕ ମॏ Ұ࿠ 19 165 59 ೋ࿠ 20

     172 64 ࡾ࿠ 21 183 72 ࢛࿠ 16 159 53

153. struct brother { int age; double height; double weight; };

     // ηϛίϩϯΘ͢Εͣʹ

154. struct brother ichiro; ichiro.age = 19; ichiro.height = 165; ichiro.weight

     = 59; printf(“%d\n”, ichiro.age); // 19

155. struct brother ichiro; ichiro.age = 19; ichiro.height = 165; ichiro.weight

     = 59; printf(“%d\n”, ichiro.age); // 19

156. brother ichiro; ichiro.age = 19; ichiro.height = 165; ichiro.weight =

     59; printf(“%d\n”, ichiro.age); // 19

157. ͍͍ͪͪstructॻ͘ͷ ΊΜͲ͏

158. ܕͷΑ͏ʹѻ͍͍ͨ

159. struct brother { char name[20]; int age; double height; double

     weight; };

160. typedef struct { char name[20]; int age; double height; double

     weight; } brother;

161. ·ͱΊ • ߏ଄ମ͸ؔ࿈͢ΔσʔλΛ·ͱΊΔ • දΈ͍ͨͳײ͡ • ޙظͷߨٛͰׂͱॏཁͬΆ͍

162. ؔ਺ͷ࿩

163. None

164. ؔ਺

165. f(x) = x * x

166. ͍͍ͩͨ͋ͬͯΔ

167. int sq (int num) { return num * num; }

     int main(){ int a = 3; printf(“%d\n”, sq(a)); return 0; }

168. Math: f(x) = x * x C: int sq (int

     num) { return num * num; }

169. Math: f(x) = x * x C: int sq (int

     num) { return num * num; }

170. Math: f(x) = x * x C: int sq (int

     num) { return num * num; }

171. Math: f(x) = x * x C: int sq (int

     num) { return num * num; }

172. Math: f(x) = x * x C: int sq (int

     num) { return num * num; }

173. int sq (int num) { return num * num; }

     ܕ ؔ਺໊ ( ܕ Ҿ਺ ) { ॲཧ ؔ਺ͷܕʹ߹ͬͨฦΓ஋ }

174. int sq (int num) { return num * num; }

     ܕ ؔ਺໊ ( ܕ Ҿ਺, ܕ Ҿ਺ ) { ॲཧ ؔ਺ͷܕʹ߹ͬͨฦΓ஋ }

175. int sq (int num) { return num * num; }

     int main(){ int a = 3; printf(“%d\n”, sq(a)); return 0; }

176. f(x) = x * x b = 3 f(b) =

     9

177. Ҿ਺पΓͰ ೰Ή͜ͱ͸ͳ͍

178. ฦΓ஋

179. ϙΠϯλ

180. None

181. ϙΠϯλ͸”ࢀর”

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

     ϙΠϯλ

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

184. // ϙΠϯλͷએݴ // “৔ॴ”ΛೖΕΔม਺ int *b_button; b_button = &button; //

     &͸ม਺ͷ”৔ॴ”Λࣔ͢

185. // ϙΠϯλͷએݴ // “৔ॴ”ΛೖΕΔม਺ int *b_button; b_button = &button; button

     = 1;

186. // ϙΠϯλͷએݴ // “৔ॴ”ΛೖΕΔม਺ int *b_button; b_button = &button; button

     = 1; printf(“%d\n”, *b_button); // 1

187. ϙΠϯλ͸”ࢀর”

188. ϙΠϯλ͸ࢦఆ͞Εͨ ৔ॴͷม਺ͷ஋Λݟʹߦ͘

189. 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);

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

191. ·ͱΊ • ϙΠϯλ͸ࢀর