Informatics 2014

Size: px

Start display at page:

Download "Informatics 2014"

みいかえいさか
4 years ago
Views:

2 C

3 計算機の歴史手回し計算機新旧のソロバンバベッジの階差機関スパコン ENIAC (1946) パソコン大型汎用計算機電卓

4 現在のコンピュータ

5 Input Output Device Central Processing Unit I/O CPU Memory

6 OS (Operating System) OS Windows 78, Vista, XP Windows Mac OS X Linux UNIXOS Linux

7 GUI Graphical User Interface GUI GUI

8 u bashrc Src Desktop a.out prog.c Informatics Mihon hello.c Exec Src a.out

9 home1 ryokoba bin Mihon / fs home2 u Desktop ~...../.. Exec Src Informatics./a.out a.out /fs/home1/ryokoba/mihon/src../../bin

10 ls : $ ls -F : ls cd : $ cd ~/Informatics/Mihon $ cd../.. $ cd ~ mkdir : $ mkdir New New

11 cp : $ cp source_file target_file target_file source_file $ cp source_file target_directory target_directory source_file mv : $ mv source_file target_file source_file target_file $ mv source_file target_directory target_directory source_file rm : rm

12 GUI cd + ls & rm

14 ,,... etc. C, Java, Fortran... etc. (CPU) CPU

15 C hello.c a.out $ cc hello.c $./a.out a.out./a.out./

16 C #include <stdio.h> int main(void) {... }... C printf( ) main( ) ( ) main

17 hello.c #include <stdio.h> int main(void) { printf( Hello!!\n ); } printf( ) Tab Key

18 2 8 = =1024 1K

19 C int, unsigned int, long, unsigned long, short, unsigned short, float, double char, unsigned char

20 int a; a int a int a; double x; double x size_of_variables.c

21 2 int a int 2 a a = 2; a x = y -1; c = a + b; y x a b c

22 C =, 1 = a; x+y =1;

23 Ex. a = a+1; a C C ==

24 int a; int a = 0; initialize.c

25 substitution.c a b int a = 100, b = 10; a = b; b = a -15; a = a + 1; swap.c a, b p, q a p q q b q q q a = b; b = a;

26 swap1.c a, b, tmp p, q a b tmp p q p q p q q p q p p tmp = a; a = b; b = tmp; 2 swap2.c a b tmp1 tmp2 p q tmp1 = a; p q p tmp2 = b; p q p q q q p q q p p q a = tmp2; b = tmp1;

27 output_values.c #include <stdio.h> int main(void) { int a= 2; double x = 1.0; printf("the value of a is %d.\n", a); printf("the value of x is %f.\n", x); } %d, %f

28 printf("input a: "); scanf("%d", &a); & double %f %lf input_values.c

29 int double int int double double double double 3/5 0.6 int type1.c, type2.c

30 1. values1.c 2. values2.c

32 CPU

33 (i)

34 (ii)

35 C

36 = < > *

37 (true) (false) > == >!= comparison.c

39 and or not logical_operator.c

40 if

41 if even_odd.c

42 1. max_of_two 2.

43 if if { } if (indent) if_in_if.c

44 intercalary_year = /400=0.2425

45 = +

47 (iii)

48 for

49 for print_counter.c

50 for

51 for sum_up

52 print_double_counter.c

53 kuku indian_kuku chess_board

54 while

55 while square.c

56 while sum_over judge_prime

57 i

59 gcd(x, y) x, y y gcd(x, y) = gcd(y, x%y) gcd(x, 0) = x gcd(20, 14) = gcd(14, 6) = gcd(6, 2) = gcd(2, 0) = , 6298

60 gcd(x, y) = gcd(y, x%y) x = py + q p q x x y y (0 q<y) y, q x x, y q = x py x, y q y, q x, y = y, q gcd(x, y) = gcd(y, q)

61 y x x, y y

62 gcd(20, 14) = gcd(14, 6) = gcd(6, 2) = gcd(2, 0) = euclid

64 (array) int int

65 set_array.c set_array2

66 define #include <stdio.h> int main(void) { int x[5], i; } for (i = 0; i < 5; i++) { x[i] = i * i; } printf("data of the array x\n"); for (i = 0; i < 5; i++) { printf("x[%d] = %d\n", i, x[i]); } #include <stdio.h> #define N 5 int main(void) { int x[n], i; } for (i = 0; i < N; i++) { x[i] = i * i; } printf("data of the array x\n"); for (i = 0; i < N; i++) { printf("x[%d] = %d\n", i, x[i]); }

67 random_number.c

68 max_of_array

69 x 0 = x 1 =1 x n+1 = x n + x n 1 (n =1, 2, ) fibonacci fibonacci_ratio

70 x m = 1 N N i=1 x i V = 1 N N i=1 statistics (x i m) 2 σ = V #include <math.h> cc statistics.c cc -lm statistics.c table_of_primes

71 $ cd $ gedit.bashrc.bashrc

72 #include <stdio.h> #include <glsc.h> int main(void) {! double x_window = 100.0, y_window = 100.0;! double waiting_time = 2.0;! g_init("graph", x_window, y_window);! g_device(g_disp);! g_sleep(waiting_time);! g_term(); } ex0.c

73 (0, 0) x_std y_std (x_window, y_window)

74 g_def_scale(scale_number, x_left, x_right, y_bottom, y_top,! x_left_std, y_top_std, x_width_std, y_width_std); x_left x_right y_top y_top_std y_width_std x_left_std x_width_std y_bottom

75 g_init("graph", x_window, y_window); g_device(g_disp); g_def_scale(0, x_left, x_right, y_bottom, y_top, x_left_std, y_top_std, x_width_std, y_width_std); g_cls(); g_sel_scale(0); g_box(0.0, 1.0, 0.0, 1.0, G_YES, G_NO); g_move(0.5, 0.0); g_plot(1.0, 1.0); g_plot(0.0, 0.5); g_plot(0.5, 0.0); g_sleep(g_stop); g_term();

76 g_text(x_std, y_std, Hello );

77 color g_line_color(color); g_area_color(color); g_text_color(color);

78 g_line_width(width); width g_line_type(type); type

79 y (x i,y i ) (x i,y i ) x (x i,y i )

80 y = f(x) y i y y = f(x) x i = x 0 + i y i = f(x i ) x (i =0, 1,,I) x i x (x i,y i ) f(x i )

Informatics 2015

Informatics 2015 C 計算機の歴史新旧のソロバンバベッジの階差機関 19C前半手回し計算機 19C後半 20C後半スパコン 1960年代 ENIAC (1946) 大型汎用計算機 1950年代 1980年代電卓 1964 パソコン 1970年代現在のコンピュータ Input Output Device Central Processing Unit I/O CPU Memory OS (Operating