#include <stdio.h> int fseek(FILE *file, long offset, int mode);
This function moves the file pointer for file according to mode:
SEEK_SET
SEEK_CUR
SEEK_END
Warning! The ANSI standard only allows values of zero for
offset when whence is not SEEK_SET
and the file has
been opened as a text file. Although this restriction is not enforced,
beware that there is not a one-to-one correspondence between file
characters and text characters under MS-DOS, so some fseek
operations may not do exactly what you expect.
Also, since lseek
under DOS does not return an error indication
when you try to move the file pointer before the beginning of the file,
neither will fseek
. Portable programs should call ftell
after fseek
to get the actual position of the file pointer.
Note that DOS does not mind if you seek before the beginning of the
file, like seeking from the end of the file by more than the file's
size. Therefore, lseek
will not return with an error in such
cases either.
Zero if successful, nonzero if not.
ANSI, POSIX
fseek(stdin, 12, SEEK_CUR); /* skip 12 bytes */
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