<iomanip>
Include the iostreams
standard header <iomanip>
to define several manipulators
that each take a single argument. Each of these manipulators returns
an unspecified type, called T1
through T6
here, that overloads both
basic_istream<Elem,
Tr>::operator>>
and
basic_ostream<Elem,
Tr>::operator<<
.
Thus, you can write extractors and inserters such as:
cin >> setbase(8); cout << setbase(8);
namespace std { T1 resetiosflags(ios_base::fmtflags mask); T2 setiosflags(ios_base::fmtflags mask); T3 setbase(int base); template<class Elem> T4 setfill(Elem ch); T5 setprecision(streamsize prec); T6 setw(streamsize wide); };
resetiosflags
T1 resetiosflags(ios_base::fmtflags mask);
The manipulator returns an object that, when extracted from or
inserted into the stream str
, calls
str.setf(ios_base::
fmtflags(), mask)
,
then returns str
.
setbase
T3 setbase(int base);
The manipulator returns an object that, when extracted from or
inserted into the stream str
, calls
str.setf(mask,
ios_base::basefield)
,
then returns str
. Here, mask
is determined
as follows:
base
is 8, then mask
is
ios_base::oct
base
is 10, then mask
is
ios_base::dec
base
is 16, then mask
is
ios_base::hex
base
is any other value, then mask
is
ios_base::fmtflags(0)
setfill
template<class Elem> T4 setfill(Elem ch);
The template manipulator returns an object that, when extracted from or
inserted into the stream str
, calls
str.fill(ch)
,
then returns str
. The type Elem
must be the
same as the element type for the stream str
.
setiosflags
T2 setiosflags(ios_base::fmtflags mask);
The manipulator returns an object that, when extracted from or
inserted into the stream str
, calls
str.setf(mask)
,
then returns str
.
setprecision
T5 setprecision(streamsize prec);
The manipulator returns an object that, when extracted from or
inserted into the stream str
, calls
str.precision(prec)
,
then returns str
.
setw
T6 setw(streamsize wide);
The manipulator returns an object that, when extracted from or
inserted into the stream str
, calls
str.width(wide)
,
then returns str
.
See also the Table of Contents and the Index.
Copyright © 1992-2002 by P.J. Plauger. All rights reserved.