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きょういちながだき
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1 $ pwd /home1/t0/t0903 / / /home1/t0/t0903 / / /home1/t0/t0903 / /... ~ $ ls $ ls -a

2 $ ls -l $ ls -l -a $ ls -la $ ls -F $ ls <dirname> <dirname> $ cd <dirname> <dirname> $ cd $ pwd $ cat <filename> <filename> $ less <filename> <filename> less $ man <cmdname> <cmdname> $ mkdir <dirname> <dirname>

3 nrps ~ nrps ~/nrps $ cd ~/nrps nrps /* This is my first C program. */ #include<stdio.h> #define MYNAME "abcdefg" int main() { printf("hello World!!\n"); printf("my name is %s.\n",myname); return(0); }

4 hello.c.c ~/nrps hello.c /* This is my first C program. */ #include<stdio.h> #define MYNAME "abcdefg" int main() { printf("hello World!!\n"); printf("my name is %s.\n",myname); return(0); } hello.c hello.c ~/nrps $ cd ~/nrps nrps $ ls-a $ gcc hello.c -o hello.out -lm

5 hello.c hello.out hello.out aaa.out aaa.out $ ls hello.out $./hello.out gcc... c ~/nrps $ cd ~/nrps $ chmod +x c $ cd ~/nrps $./c hello hello.c hello.out hello.c ~/nrps ~/nrps $ cd~/nrps

6 cd $ ls -a $ rm -r <file name> $ ls -a

7 io_sample.c #include <stdio.h> int main() { int a, b; int c; printf("input:\n"); printf("a="); scanf("%d",&a); printf("b="); scanf("%d",&b); printf("a=%d,b=%d",a,b); c = a+b; printf("c = a + b = %d + %d = %d", a, b, c); if( c < 0 ){ printf("%d is negative.\n",c); }else if(c > 0){ printf("%d is positive.\n",c); }else{ printf("%d is zero.\n"); } } return 0; a b c c

8 \n

9 int double float char long short int char double float char char.c #include <stdio.h> int main() { char a,b,c; a = 'x'; b = '1'; c = '%'; printf("%c %c %c\n",a,b,c); printf("%d %d %d\n",a,b,c); } return(0); char_tab.c #include <stdio.h> int main() {

10 char a,b,c; a = 'x'; b = '1'; c = '%'; printf("%c\t%c\t%c\n",a,b,c); printf("%d\t%d\t%d\n",a,b,c); } return(0); printf %d %c char printf %f %e %g % variable.c

11 #include <stdio.h> int main(void) { int i,j; double f,g,h,k; i = 1.5; j = 2/3; f = 2/3; g = 2/(double)3; h = 2/3.0; k = 2.0/3; } printf("int i = 1.5 = %d\n",i); printf("int j = 2/3 = %d\n",j); printf("double f = 2/3 = %f\n",f); printf("double g = 2/(double)3 = %f\n",g); printf("double h = 2/3.0 = %f\n", h); printf("double k = 2.0/3 = %f\n", k); return 0;

12 { } #include.c ; #include <stdio.h> int main() { printf("hello World!\n"); return(0); } #include <stdio.h> int main(){printf("hello World!\n");return(0);} main()

13 #include <stdio.h> int mai n(){printf("hello World!\n");return(0);} ; : {} () [] <> #include '' "" / % { } _ _

14 + a = b+c; b c a - a = b-c; b c a * a = b*c; b c a / a = b/c; b c a % a = b%c; b c a ++ a++; ++a; a = a + 1; -- a--; --a; a = a - 1; - b = -a; = a = b += a += b; a = a + b; -= a -= b; a = a - b; *= a *= b; a = a*b; /= a /= b; a = a/b; %= a %= b; a = a%b; > < >= <= ==!=

15 &&! a = (b > c); c b a a a = ( b!= c); b c a a a = (b > c) && (c < d); b>c c<d a a = (b > c) (c < d); b>c c<d a a =!(b > c); b>c a if for while 1 #include <stdio.h> 2 #include <stdlib.h> 3 4 int main() 5 { 6 int num,i; 7 8 for(i=0;i<4;i++){ 9 num = rand()%2000; if(num < 100){ 12 printf("%d < 100\n", num); 13 }else if(num > 1000){ 14 printf("%d > 1000\n", num);

16 15 }else{ 16 printf("100 <= %d <= 1000\n",num); 17 } if(num < 100)printf("The num is smaller than 100\n"); } i=0; 24 while(i < 5){ 25 num = rand()%2000; 26 printf("num = %d\n",num); 27 i++; 28 } do{ 31 num = rand()%2000; 32 printf("in do_while, num = %d\n",num); 33 i--; 34 }while(i>0); return(0); 37 } 38

18 janken_1.c 1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <time.h> 4 #define GU "\n nnnn\ncuuuu\n" 5 #define TYOKI "\n n n\n //\n N\n \\ /\n" 6 #define PA "\nnnnn\n /\\\n / /\n\\ /\n" 7 8 int main() 9 { 10 char man, pc; 11 char *man_no_te, *pc_no_te; 12 time_t now; 13 char *time_char; 14 char ctmp[10]; 15 int hour, min, sec, tmp; 16 unsigned seed; printf("let's do JAN-KEN with me!!!!!\n"); 19 printf("jan-ken-pon \ngu: %s\n TYOKI: %s\n PAH: %s\n\n", GU, TYOKI, PA); 20 printf("input your choice from G, T and P (for GU, TYOKI, PAH)\n"); 21 printf("-->"); 22 scanf("%c", &man); if(man == 'g'){ 25 man='g'; 26 man_no_te = GU; 27 }else if(man == 'G'){ 28 man_no_te = GU; 29 }else if(man == 't'){ 30 man='t'; 31 man_no_te = TYOKI;

19 32 }else if(man == 'T'){ 33 man_no_te = TYOKI; 34 }else if(man == 'p'){ 35 man = 'P'; 36 man_no_te = PA; 37 }else if(man == 'P'){ 38 man_no_te = PA; 39 } /* Initialization of random number */ 42 time(&now); 43 time_char = ctime(&now); 44 sscanf(time_char,"%s %s %d %d:%d:%d %d\n", ctmp, ctmp, &tmp, 45 &hour, &min, &sec, &tmp); 46 printf("%d:%d:%d\n", hour, min, sec); 47 seed = hour+min+sec; 48 srand(seed); 49 /****/ pc = rand()%3; 52 if(pc == 0){ 53 pc = 'G'; 54 pc_no_te = GU; 55 } 56 if(pc == 1){ 57 pc = 'T'; 58 pc_no_te = TYOKI; 59 } 60 if(pc == 2){ 61 pc = 'P'; 62 pc_no_te = PA; 63 } printf("you:\n %s \ni CPU:\n %s \n", man_no_te, pc_no_te);

20 66 if((man == 'G' && pc == 'P') (man == 'T' && pc == 'G') 67 (man == 'P' && pc == 'T')){ 68 printf("i CPU won.\n"); 69 }else if(man == pc){ 70 printf("draw.\n"); 71 }else{ 72 printf("you won.\n"); 73 } return(0); 76 }

21 if switch int scanf int %d char c short %hd long %ld float %f double %lf &&! ifswitch while for do while for_if.c 1 #include <stdio.h> 2 3 int main() 4 { 5 int j; 6 7 for(j=0;j<6;j++){ /* j++ j = j+1, j-- j = j-1 */ 8 if(j%2 == 0){ 9 printf("j = %d\n", j); 10 }else{ 11 printf("-----\n"); 12 } 13 }

22 14 15 printf("*****\n*****\n"); for(j=0;j<6;j++){ 18 if(j/2 == 1){ 19 printf("j = %d\n", j); 20 }else{ 21 printf("-----\n"); 22 } 23 } return(0); 26 } #include <stdio.h> int main() { int i; int wa; wa = 0; for(i=0;i<=10;i++){ wa += i; } printf(":%d\n",wa); } return(0); while

23 #include <stdio.h> int even(int j) { if(j%2 == 0){ return(1); }else{ return(0); } } int main() { int j; printf("\n"); for(j=0;j<10;j++){ printf("%d is ",j); if(even(j)){ printf("even.\n"); }else{ printf("odd.\n"); } } return(0); } #include <stdio.h>

24 int even(int a); int main() { int j; printf("\n"); for(j=0;j<10;j++){ printf("%d is ",j); if(even(j)){ printf("even.\n"); }else{ printf("odd.\n"); } } return(0); } int even(int j) { if(j%2 == 0){ return(1); }else{ return(0); } } #include <stdio.h> int main() {

25 double a, b; a = 1.0; b = 2.0; } printf("%f\n", waru(a,b)); return(0); double tasu(double x, double y) { return(x+y); }

26 int x; x & &x int *p; p *p #include <stdio.h> int main() { int x; int *p; p = &x; x = 1; printf("x = %d\n", x); printf("address of x = %p\n", &x); printf("p = %p\n", p); *p = 2; printf("after *p = 2, \n"); printf("x = %d\n", x); printf("address of x = %p\n", &x); printf("p = %p\n", p); printf("input integer:"); scanf("%d",p); printf("\nx = %d\n", x); printf("address of x = %p\n", &x); printf("p = %p\n", p); } return(0);

27 1 #include <stdio.h> 2 3 void change(int *a, int *b) 4 { 5 int c; 6 7 c = *a; 8 *a = *b; 9 *b = c; } void badchange(int a, int b) 14 { 15 int c; c = a; 18 a = b; 19 b = c; 20 } int main() 23 { 24 int x,y; x=1; 27 y=2; 28 printf("x = %d, y = %d\n",x,y); 29 badchange(x,y); 30 printf("x = %d, y = %d\n",x,y); 31 change(&x,&y); 32 printf("x = %d, y = %d\n",x,y); 33

28 34 return(0); 35 } 36 badchange() a b badchange() badchange() badchange() main() change() scanf()

29 janken_2.c 1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <time.h> 4 #define GU "\n nnnn\ncuuuu\n" 5 #define TYOKI "\n n n\n //\n N\n \\ /\n" 6 #define PA "\nnnnn\n /\\\n / /\n\\ /\n" 7 8 int ran_123() 9 { 10 static int first=1; 11 time_t now; 12 char *time_char; 13 char ctmp[10]; 14 int hour, min, sec, tmp; 15 unsigned seed; if(first){ 18 time(&now); 19 time_char = ctime(&now); 20 sscanf(time_char,"%s %s %d %d:%d:%d %d\n", ctmp, ctmp, &tmp, 21 &hour, &min, &sec, &tmp); 22 printf("%d:%d:%d\n", hour, min, sec); 23 seed = hour+min+sec; 24 srand(seed); 25 first = 0; 26 } return(rand()%3);

30 29 } int janken() 32 { 33 char man, pc, tmp; 34 char *man_no_te, *pc_no_te; printf("let's do JAN-KEN with me!!!!!\n"); 37 printf("jan-ken-pon \ngu: %s\n TYOKI: %s\n PAH: %s\n\n", GU, TYOKI, PA); 38 printf("input your choice from G, T and P (for GU, TYOKI, PAH)\n"); 39 printf("-->"); 40 scanf("%c", &man); 41 scanf("%*c",&tmp); if(man == 'g'){ 44 man='g'; 45 man_no_te = GU; 46 }else if(man == 'G'){ 47 man_no_te = GU; 48 }else if(man == 't'){ 49 man='t'; 50 man_no_te = TYOKI; 51 }else if(man == 'T'){ 52 man_no_te = TYOKI; 53 }else if(man == 'p'){ 54 man = 'P'; 55 man_no_te = PA; 56 }else if(man == 'P'){ 57 man_no_te = PA; 58 } pc = ran_123(); 61 if(pc == 0){ 62 pc = 'G';

31 63 pc_no_te = GU; 64 } 65 if(pc == 1){ 66 pc = 'T'; 67 pc_no_te = TYOKI; 68 } 69 if(pc == 2){ 70 pc = 'P'; 71 pc_no_te = PA; 72 } printf("you:\n %s \ni CPU:\n %s \n", man_no_te, pc_no_te); 75 if((man == 'G' && pc == 'P') (man == 'T' && pc == 'G') 76 (man == 'P' && pc == 'T')){ 77 printf("i CPU won.\n"); 78 return(1); 79 }else if(man == pc){ 80 printf("draw.\n"); 81 return(0); 82 }else{ 83 printf("you won.\n"); 84 return(-1); 85 } } int main() 90 { 91 janken(); 92 return(0); 93 } 94

32 GU "\n nnnn\ncuuuu\n" ran_123() ran_012() ran_123() first first 1 first 1 time() time_t now ctime() time_char sscanf() hour min sec seed srand() srans() rand() seed first rand() janken() janken_1.c main()

33 while janken()

34 1 #include <stdio.h> 2 #include <stdlib.h> 3 #define FILENAME "myfile.txt" 4 #define DATAN int main() 7 { 8 FILE *fp; 9 int c,rnum; if((fp = fopen(filename,"w")) == NULL){ 12 printf("can not open the file '%s'.\n",filename); 13 return(1); 14 } for(c=0;c<datan;c++){ 17 rnum = rand(); 18 fprintf(fp,"%d\n",rnum%40); 19 printf("%d\n",rnum%40); 20 } fclose(fp); 23 return(0); 24 } 25

35 1 #include <stdio.h> 2 #include <stdlib.h> 3 #define FILENAME "myfile.txt" 4 #define DATAN int main() 7 { 8 FILE *fp; 9 int c,rnum; if((fp = fopen(filename,"r")) == NULL){ 12 printf("can not open the file '%s'.\n",filename); 13 return(1); 14 } for(c=0;c<datan;c++){ 17 fscanf(fp,"%d\n",&rnum); 18 printf("%d\n",rnum); 19 } fclose(fp); 22 return(0); 23 } 24

36 1 #include <stdio.h> 2 #include <stdlib.h> 3 #define FILENAME "myfile.txt" 4 #define DATAN void change(int *a, int *b); 7 8 void change(int *a, int *b) 9 { 10 int c; c = *a; 13 *a = *b; 14 *b = c; } int main() 19 { 20 FILE *fp; 21 int c,rnum[datan],i,j; if((fp = fopen(filename,"r")) == NULL){ 24 printf("can not open the file '%s'.\n",filename); 25 return(1); 26 } for(c=0;c<datan;c++){ 29 fscanf(fp,"%d\n",rnum+c); 30 printf("%d\n",rnum[c]); 31 }

37 32 33 for(i=0;i<datan-1;i++){ 34 for(j=datan-1;j>i;j--){ 35 if(rnum[j] < rnum[j-1]){ 36 change(rnum+j, rnum+j-1); 37 } 38 } 39 } printf("########\n"); for(c=0;c<datan;c++){ 44 printf("%d\n",rnum[c]); 45 } fclose(fp); 48 return(0); 49 } 50

38 2 x t 2 = a, a x t = at + A, x = 1 2 at2 + At + B, A, B x t x(t) p(t) = t x(t), t t p(t) t = a, x(t) t = p(t), t j = j t, p j = p(j t), x j = x(j t), p j+1 p j + a t, x j+1 x j + p j t, p(0) = 0 x(0) = 0 A = 0 B = 0

39 t = 0.1 p 1 p a, x 1 x p 0, p 2 p a, x 2 x p 1, p(0) = 0 x(0) = 0 a = 2.0 t = t 10.0 t j, p(t j ), x(t j ), p j, x j deq.txt p(t j ), x(t j ) t j deq.txt t

40 main2d.c ~/nrps main2d.c $ cd ~/nrps $./c main2d $./main2d.out 1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <GL/glut.h> 4 5 #define WIDTH #define HIGHT void display(void); 9 void reshape(int w, int h); 10 void keyboard(unsigned char key, int x, int y); 11 void ginit(int* pargc, char** argv); void display(void) 14 { 15 int i, j; glclear(gl_color_buffer_bit); 18 glpointsize(1); 19 glbegin(gl_points); 20 glcolor3f(1.0,0.0,0.0); /* red */ 21 glvertex2f(1,1); 22 glcolor3f(0.0,1.0,0.0); /* green */

41 23 glvertex2f(2,2); 24 glcolor3f(0.0,0.0,1.0); /* blue */ 25 glvertex2f(3,3); glend(); 28 glutswapbuffers(); 29 } void reshape(int w, int h) 32 { 33 glviewport(0, 0, (GLsizei)w, (GLsizei)h ); 34 glmatrixmode(gl_projection); 35 glloadidentity(); 36 gluortho2d(0.0, (GLdouble)w, 0.0, (GLdouble) h); 37 } void keyboard(unsigned char key, int x, int y) 40 { 41 switch(key) { 42 case 'q': 43 case 'Q': 44 exit(0); 45 break; 46 case ' ': 47 glutidlefunc(0); 48 break; 49 default: 50 break; 51 } 52 } void ginit(int* pargc, char** argv) 55 { 56 glutinit(pargc,argv);

42 57 glutinitdisplaymode(glut_double GLUT_RGB); 58 glutinitwindowsize(width,hight); 59 glutinitwindowposition(100,50); 60 glutcreatewindow("numerical Recipes for Polymer Science"); 61 glclearcolor(0.0,0.0,0.0,0.0); /* background color */ 62 glshademodel(gl_flat); 63 glutdisplayfunc(display); 64 glutreshapefunc(reshape); 65 glutkeyboardfunc(keyboard); 66 } int main(int argc, char* argv[]) 69 { 70 ginit(&argc,argv); 71 glutmainloop(); 72 return 0; 73 } WIDTH HIGHT WIDTH 300 reshape void int display glutdisplayfunc(display) display

43 i j display() 1 glbegin() glend() glbegin(gl_points) glbegin(gl_lines) glbegin(gl_line_strip) glbegin(gl_line_loop) glbegin(gl_triangles / GL_QUADS) glbegin(gl_trianble_strip / GL_QUAD_STRIPE) glbegin(gl_triangle_fan) glbegin(gl_polygon) glcolor3f() glvertex2f(float x, float y) (x, y) glutswapbuffers() reshape(int w, int h) glutreshapefunc() glutkeyboardfunc() ginit(int* pargc, char** argv)

44 main() main().c 1 #include <stdio.h> 2 #include <stdlib.h> 3 4 double f2bai(double x); 5 double tasu(double x, double y); 6 7 double f2bai(double x) 8 { 9 printf("f2bai works.\n"); return(2.0*x); 12 } double tasu(double x, double y) 15 { 16 return(x+y); 17 } int main() 20 { 21 double a,b; a = (rand()%1000)/1000.0; 24 b = (rand()%1000)/1000.0;

45 25 26 printf("2*%lf = %lf\n", a, f2bai(a)); 27 printf("%lf + %lf = %lf\n", a, b, tasu(a,b)); return(0); 30 } ~/nrps $ pwd main2d.c hexagon.c $ cp main2d.c hexagon.c 1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <GL/glut.h> * 4 #include <math.h> 5 6 #define WIDTH #define HIGHT 300 * 8 #define RADIUS 100 * 9 #define X0 150 *10 #define Y void display(void) 18 {

46 *19 int x, y, deg; glclear(gl_color_buffer_bit); 22 glpointsize(1); *23 glbegin(gl_line_loop); *24 glcolor3f(1.0, 1.0, 0.0); /* yellow */ *25 for(deg = 0; deg < 360; deg = deg+60){ *26 x = RADIUS*cos(deg*M_PI/180); *27 y = RADIUS*sin(deg*M_PI/180); *28 glvertex2f(x0+x,y0+y); *29 } 30 glend(); 31 glutswapbuffers(); 32 } hexagon.c math.h RADIUS X0 Y0 display() hexagon.c hexagon.c 1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <GL/glut.h> 4 #include <math.h> * 5 #include <time.h> 6

47 7 #define WIDTH #define HIGHT #define RADIUS #define X #define Y0 150 *12 #define DEGSTEP void display(void); 15 void reshape(int w, int h); 16 void keyboard(unsigned char key, int x, int y); 17 void ginit(int* pargc, char** argv); *18 void idle(void); 19 *20 int Degshift=0; 21 *22 void idle(void) *23 { *24 static int first = 1; *25 static time_t past; *26 time_t now; *27 *28 if(first == 1){ *29 time(&past); *30 first = 0; *31 return; *32 } *33 *34 time(&now); *35 *36 if(difftime(now,past) > 1.0){ *37 Degshift += DEGSTEP; *38 past = now; *39 } *40

48 *41 glutpostredisplay(); *42 } void display(void) 45 { 46 int x, y, deg; glclear(gl_color_buffer_bit); 49 glpointsize(1); 50 glbegin(gl_polygon); 51 glcolor3f(1.0, 1.0, 0.0); /* yellow */ 52 for(deg = 0; deg < 360; deg = deg+60){ *53 x = RADIUS*cos((deg+Degshift)*M_PI/180); *54 y = RADIUS*sin((deg+Degshift)*M_PI/180); 55 glvertex2f(x0+x,y0+y); 56 } 57 glend(); 58 glutswapbuffers(); 59 } void reshape(int w, int h) 62 { 63 glviewport(0, 0, (GLsizei)w, (GLsizei)h ); 64 glmatrixmode(gl_projection); 65 glloadidentity(); 66 gluortho2d(0.0, (GLdouble)w, 0.0, (GLdouble) h); 67 } void keyboard(unsigned char key, int x, int y) 70 { 71 switch(key) { 72 case 'q': 73 case 'Q': 74 exit(0);

49 75 default: 76 break; 77 } 78 } void ginit(int* pargc, char** argv) 81 { 82 glutinit(pargc,argv); 83 glutinitdisplaymode(glut_double GLUT_RGB); 84 glutinitwindowsize(width,hight); 85 glutinitwindowposition(100,50); 86 glutcreatewindow("numerical Recipes for Polymer Science"); 87 glclearcolor(0.0,0.0,0.0,0.0); /* background color */ 88 glshademodel(gl_flat); 89 glutdisplayfunc(display); 90 glutreshapefunc(reshape); 91 glutkeyboardfunc(keyboard); *92 glutidlefunc(idle); 93 } int main(int argc, char* argv[]) 96 { 97 ginit(&argc,argv); 98 glutmainloop(); 99 return 0; 100 } 101 rothex.c time() time.h.h

50 DEGSTEP idle(void) Degshift glutidlefunc() 1 0 first static static time.h time_t now past now past time(&past) first return if time(&now) now difftime(now,past) now past Degshift DEGDTEP now past

51 idle(void)

$ ls -l $ ls -l -a $ ls -la $ ls -F $ ls <dirname> <dirname> $ cd <dirname> <dirname> $ cd $ pwd $ cat <filename> <filename> $ less <filename> <filena

$ pwd /home1/t0/t0903 / / /home1/t0/t0903 / / /home1/t0/t0903 / /... ~ $ ls $ ls -a $ ls -l $ ls -l -a $ ls -la $ ls -F $ ls $ cd $ cd $ pwd $ cat