fpos::operator-=
Decrements a file-position indicator.
fpos<Statetype>& operator-=(
streamoff _Off
);
- _Off
Stream offset.
The member function returns fpos(*this) -= _Off.
For positioning within a file, the result is generally valid only for binary streams that do not have a state-dependent encoding.
See operator!= for a sample of using operator-=.
Header: <ios>
Namespace: std