wcin(3C++) - wcin(3C++)
Standard C++ Library Copyright 1998, Rogue Wave Software, Inc.
NAMEwcin
- Controls input from a stream buffer associated with the object stdin
declared in <cstdio>.
SYNOPSIS
#include <iostream>
extern wistream wcin;
wistream wcin;
DESCRIPTION
The object wcin controls input from a stream buffer associated with the
object stdin declared in <cstdio>. By default the standard C and C++
streams are synchronized, but performance improvement can be achieved
by using the ios_base member function synch_with_stdio to desynchronize
them.
After the object wcin is initialized, wcin.tie() returns &wcout, which
implies that wcin and wcout are synchronized. wcin uses the locale
codecvt facet to convert the tiny characters extracted from stdin to
the wide characters stored in the wcin buffer.
EXAMPLE
//
// wcin example #1
//
#include <iostream>
void main ( )
{
using namespace std;
int i;
float f;
wchar_t c;
//read an integer, a float and a wide character from stdin
wcin >> i >> f >> c;
// output i, f and c to stdout
wcout << i << endl << f << endl << c << endl;
}
//
// wcin example #2
//
#include <iostream>
void main ( )
{
using namespace std;
wchar_t p[50];
// remove all the white spaces
wcin >> ws;
// read characters from stdin until a newline
// or 49 characters have been read
wcin.getline(p,50);
// output the result to stdout
wcout << p;
}
When inputting " Grendel the monster" (newline) in the previous test, the
output is: "Grendel the monster". The manipulator ws removes spaces.SEE ALSO
basic_istream(3C++), basic_iostream(3C++), basic_filebuf(3C++),
cin(3C++), cout(3C++), cerr(3C++), clog(3C++), wcout(3C++),
wcerr(3C++), wclog(3C++), ios_base(3C++), basic_ios(3C++)
Working Paper for Draft Proposed International Standard for Information
Systems--Programming Language C++, Section 27.3.2
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
Rogue Wave Software 02 Apr 1998 wcin(3C++)
