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rewind |
Portability: | ISO/ANSI C conforming, UNIX compatible |
SYNOPSIS | |
DESCRIPTION | |
RETURN VALUE | |
EXAMPLE | |
RELATED FUNCTIONS | |
SEE ALSO |
SYNOPSIS |
#include <stdio.h> void rewind(FILE *f);
DESCRIPTION |
rewind
positions the stream associated with the
FILE
object addressed by
f
to its first
character. It also resets the error flag for the stream if it is set.
RETURN VALUE |
rewind
has no return value.
EXAMPLE |
#include <stdio.h> #define RECLEN 80 FILE *f; /* file to be searched */ char *search(int); /* prototype of the search function */ main() { int n ; /* The record number to be found */ /* points to the address of a copy of */ /* the returned record. */ char *addr; /* Ask the user for the number of the record to */ /* be found. */ puts("Which record do you want to read?"); scanf("%d", &n); addr = search(n); printf("The record is %s\n", *addr); } /* performs the search and rewind of the file f */ char *search(int n){ char *record; /* points to a copy of the record */ int i; while (!feof(f)) { /* Read the records until the nth one is found. */ for (i=0; i <= n; i++) afread(record, RECLEN, 1, f); } /* Reposition the stream to the top of f. */ rewind(f); /* Return the address of the copy of the record. */ return record; }
RELATED FUNCTIONS |
SEE ALSO |
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