long setf( long lFlags );
long setf( long lFlags, long lMask );
lFlags
Format flag bit values. See the flags member function for a list of format flags. These flags can be combined by using the bitwise-OR (|) operator.
lMask
Format flag bit mask.
The first overloaded setf function turns on only those format bits that are specified by 1s in lFlags. It returns a long that contains the previous value of all the flags.
The second function alters those format bits specified by 1s in lMask. The new values of those format bits are determined by the corresponding bits in lFlags. It returns a long that contains the previous value of all the flags.
ios::flags, ios::unsetf, ios setiosflags manipulator