/
, : ' ' FILE, stdio.h ( /, , ..). ' fopen (), stdio.h FILE. , , FILE, :
FILE *fp;
fp = fopen(< _ >, < __ >);
fopen () : ' . , : , .
:
- r - ;
- w - ( , );
- a - ( , );
- r+ - : , ;
- w+ - : , ;
- a+ - ( , ).
(, r+ ' ), fopen () NULL. :
If ((fp = fopen((< _ >, < __ >) == NULL) { } { }
, , "'" FILE , , . fclose (fp). ' , ' /, /. - 䴻, "", " '". , . .
, , . .
fputc()
:
fputc(<,____>, __);
: __, fp.
/* KTOD: . */
# include <stdlib.h>
# include <stdio.h>
# include <windows.h>
# include <locale.h>
int main() {
|
|
|
setlocale(LC_CTYPE, "Russian");
FILE *fp;
char ch;
if((fp=fopen("test", "w"))==NULL) {
printf(" ii .\n");
system ("pause");
exit(1);
}
printf("i i. i ii i i $ [Enter] \n");
do {
ch = getchar();
fputc(ch, fp);
} while (ch!= '$');
fclose(fp);
system ("pause");
return 0;
}
fgetc()
:
char c = fgetc(fp);
fp. EOF.
/* DTOS: , . */
# include <stdlib.h>
# include <stdio.h>
# include <windows.h>
# include <locale.h>
int main() {
setlocale(LC_CTYPE, "Russian");
FILE *fp;
char ch;
if((fp=fopen("test", "r"))==NULL) {
printf(" ii .\n");
system ("pause");
exit(1);
}
printf(" \n");
ch = fgetc (fp); /* */
while (ch!= EOF) {
putchar (ch); /* */
ch = fgetc (fp);
}
printf("\n");
fclose(fp);
system ("pause");
return 0;
}
feof()
:
feof(fp);
, , fgetc () EOF. , fgetc (), , , . -, , . , , , ' , EOF. , , . -, fgetc () EOF , , . fgetc (), , . feof (), , . feof () :
int feof(FILE < >);
, feof () true (), . , :
while(!feof(< >)) ch = fgetc(< >);
, , .
, , feof (). , feof () ߹, .
/* . */
# include <stdlib.h>
# include <stdio.h>
# include <windows.h>
# include <locale.h>
int main() {
setlocale(LC_CTYPE, "Russian");
FILE *in, *out;
char ch;
if((in=fopen("testr", "rb"))==NULL) {
printf(" i i .\n");
system ("pause");
exit(1);
}
if((out=fopen("testw", "wb"))==NULL) {
|
|
|
printf(" i i.\n");
system ("pause");
exit(1);
}
/* . */
while (! feof (in)) {
ch = getc (in);
if (!feof (in)) fputc (ch, out);
}
fclose (in);
fclose (out);
system ("pause");
return 0;
}
߹ fp: ( ). , , rewind () - "" , . . , , - .
fputs()
:
fputs(< >, <__>);
.
#include <stdlib.h>
#include <stdio.h>
#include <windows.h>
#include <locale.h>
#include <string.h>
int main() {
setlocale(LC_CTYPE, "Russian");
char str [80];
FILE *fp;
if ((fp = fopen ("TEST", "w")) == NULL) {
printf (" ii . \ n");
system ("pause");
exit(1);
}
do {
printf ("i (i - ): \n");
gets (str);
strcat (str, "\n"); //
fputs (str, fp);
} while (strcmp("\n", str)); // strcmp() -
fclose (fp);
system ("pause");
return 0;
fgets()
:
fgets(s, maxline, fp);
s, s - char ( ' ), maxline - , fp. NULL.
fgets () , , maxline. , .
# include <stdlib.h>
# include <stdio.h>
# include <windows.h>
# include <locale.h>
# include <string.h>
int main() {
setlocale(LC_CTYPE, "Russian");
char str [80];
int i=0;
FILE *fp;
if ((fp = fopen ("test", "r")) == NULL) {
printf (" ii . \n");
system ("pause");
exit(1);
}
while (! feof (fp)) {
i++;
printf (" i %d- ", i);
fgets (str, 79, fp);
printf (str);
}
printf ("\n");
fclose (fp);
system ("pause");
return 0;
}
fread()
:
fread(buf, m, n, fp);
fp n , m . , buf, , char buf [50] char * buf ( ' ). (n * m). , NULL.
fwrite()
:
fwrite(ptr, m, n, fp);
n fp, m . , ptr ( ', , ). (n * m). , - .
, fread () fwrite () - . , double, int long, a . , sizeof ().
|
|
|
/*
. */
# include <stdlib.h>
# include <stdio.h>
# include <windows.h>
# include <locale.h>
# include <ctype.h>
int main() {
setlocale(LC_CTYPE, "Russian");
FILE * fp;
float d = 12.23;
int i = 101;
long l = 123023L;
if ((fp = fopen ("test", "wb+")) == NULL) {
printf (" . \n");
system ("pause");
exit (1);
}
fwrite (&d, sizeof (double), 1, fp);
fwrite (&i, sizeof (int), 1, fp);
fwrite (&l, sizeof (long), 1, fp);
rewind (fp);
fread (&d, sizeof (double), 1, fp);
fread (&i, sizeof (int), 1, fp);
fread (&l, sizeof (long), 1, fp);
printf ("%4.2f %d %ld", d, i, l);
printf ("\n");
fclose (fp);
system ("pause");
return 0;
}
, ( ) ', . , fread () fwrite (), . , .
fread () fwrite () , . ,
struct struct_type {
float balance;
char name [80];
} Cust;
cust , fp:
fwrite (& cust, sizeof (struct struct_type), 1, fp);
