ostream& seekp( streampos pos );
ostream& seekp( streamoff off, ios::seek_dir dir );
pos
The new position value; streampos is a typedef equivalent to long.
off
The new offset value; streamoff is a typedef equivalent to long.
dir
The seek direction specified by the enumerated type ios::seek_dir, as follows:
| Value | Meaning |
| ios::beg | Seek from the beginning of the stream. |
| ios::cur | Seek from the current position in the stream. |
| ios::end | Seek from the end of the stream. |
Changes the position value for the stream. Not all derived classes of ostream need support positioning. For file streams, the position is the byte offset from the beginning of the file; for string streams, it is the byte offset from the beginning of the string.