mstrcpy char *mstrcpy(const char *src); mstrcpy malloc (main free ) stdio.h fgets char *fgets(char *s, int size, FILE *stream); s size ( )

Transcription

1 mstrcpy char *mstrcpy(const char *src); mstrcpy malloc (main free ) stdio.h fgets char *fgets(char *s, int size, FILE *stream); s size ( ) stream FILE ( man ) 40 ( ) %./a.out String : test Original : test (0x0xbfbd4160) Copy : test (0x0x804a050) %./a.out String : Hello Original : Hello (0x0xbfcb4860) Copy : Hello (0x0x804a050) %./a.out String : Hello World! 1

2 Original : Hello World! (0x0xbfab85e0) Copy : Hello World! (0x0x804a050) fgets mstrcpy malloc mstrcpy (main ) mstrcpy malloc free fgets stream 1 ( \n ) \n (scanf "%s" 1 ( \n \t ) Hello world! scanf("%s",str) Hello ) stdio.h stdin stdout stderr FILE (fgets 3 ) printf "%p" char *p; : printf("%p\n", p); string.h strlen size_t strlen(const char *s); s size_t int ( man ) malloc void *malloc(size_t size); size ( ) +1 ( \0 ) void * char * 2

3 mstrcpy malloc () 3

4 2 ( sin, cos, tan, log, exp ) ( ) 2 Please specify a function and a value 1 Undefined function 2 sin cos tan log exp libm % gcc () -lm -lm (libm) (sin cos tan [rad] log exp e(= ) ) %./a.out Please specify a function and a value %./a.out cos Please specify a function and a value %./a.out sin 1 2 Please specify a function and a value %./a.out sin 1 Ans : %./a.out cos Ans : %./a.out tan 2 Ans : %./a.out exp 1 Ans : %./a.out log Ans : %./a.out hoge 10 Undefined function : hoge stdio.h fprintf 4

5 int fprintf(file *stream, const char *format,...); stream format... printf string.h int strcmp(const char *s1, const char *s2); strcmp s1 s2 0 ( man ) stdlib.h double atof(const char *nptr); atof nptr double ( man ) 5

6 3 ( A Z ) ( a z ) ( 0 9 ) ( ) ( ) Usage : ( ) <file name> 2 2 Cannot open file : ( ) sample10-3_1.txt sample10-3_2.txt ~ren/pro3_2008_quiz/ %./a.out Usage./a.out <file name>. %./a.out sample10-3_1.txt Upper-case alphabets : 11 Lower-case alphabets : 147 Numbers : 0 Marks : 39 Total : 197 %./a.out sample10-3_2.txt Upper-case alphabets : 76 Lower-case alphabets : 801 Numbers : 0 Marks : 348 Total : 1225 %./a.out hoge.txt Cannot open file : hoge.txt fopen fopen fclose Usage... argv[0] 6

7 FILE *fopen(const char *path, const char *mode); path mode r w fopen NULL ( man ) int *fclose(file *fp); fp fopen FILE ( man ) int *fgetc(file *fp); fp fopen FILE getchar int ( man ) 7

8 4 (0 ) (0 1 ) ( a z ) ( A Z ) void toupper(file *in, FILE *out); ( ) Cannot open file : ( ) sample10-4_1.txt sample10-4_2.txt sample10-4_3.txt ~ren/pro3_2008_quiz/ % echo test./a.out TEST % echo Hello World!./a.out test.txt % cat test.txt HELLO WORLD! %./a.out sample10-4_1.txt sample10-4_2.txt test2.txt % cat test2.txt PETER PIPER PICKED A PECK OF PICKLED PEPPERS LONDON BRIDGE IS FALLING DOWN, FALLING DOWN, FALLING DOWN. %./a.out sample10-4_3.txt sample10-4_2.txt sample10-4_1.txt test3.txt % cat test3.txt WHO KILLED COCK ROBIN? LONDON BRIDGE IS FALLING DOWN, FALLING DOWN, FALLING DOWN. PETER PIPER PICKED A PECK OF PICKLED PEPPERS %./a.out hoge.txt test4.txt Cannot open file : hoge.txt toupper 8

9 1 2 stdio.h fputc fputc int fputc(int c, FILE *stream); c (int ) stream fopen FILE 1 stdio.h stdin stdout stderr FILE fputc fgetc stream fopen toupper fgetc fputc (main ) toupper (stdin stdout fopen FILE ) 1 9

10 5 ID 1 Yamasaki Ohmura : 1 ID (EOF) (ID ) 40 malloc free next (person ) name struct person_list{ strcut person *next; int id; char *name; int height; int weight; }; Uasage : ( ) <file name> Cannot open file : ( ) 2 2 sample10-5.txt ~ren/pro3_2008_quiz/ %./a.out sample10-5.txt ID : 6 Name : Sato Height : 173 Weight : 66 ID : 5 Name : Imamura Height : 174 Weight : 64 ID : 4 Name : Suito Height : 172 Weight : 60 10

11 ID : 3 Name : Chishiro Height : 182 Weight : 65 ID : 2 Name : Ohmura Height : 165 Weight : 68 ID : 1 Name : Yamasaki Height : 170 Weight : 62 person list person list malloc malloc free fgets fgetc fscanf fscanf stdio.h int fscanf(file *stream, const char *format,...): stream FILE scanf EOF ( man ) 1 "%s" 1 "%d" "%f" < > < > < > 3 ( ) int a,b,c; : fscanf(fp, "%d%d%d", &a, &b, &c); a,b,c 11

12 < > <> < > int a,b; char str[40]; : fscanf(fp, "%d%s%d", &a, &str[0], &c); person list name char name 1 mstrcpy ( free mstrcpy malloc ) (person list ) struct person_list *head = NULL; struct person_list *p; : p = (strcut person_list *)malloc(sizeof(struct person_list)); /* p */ p->next = head; head = p; for (p = head; p!= NULL; p = p->next) { /* */ } 12