wcin (3C++std) - Tru64 UNIX
Standard C++ LibraryCopyright 1996, Rogue Wave Software, Inc. NAME
wcin
SYNOPSIS
#include <iostream>
extern wistream wcin;
DESCRIPTION
wistream wcin;
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.
EXAMPLES
//
// wcin example one
//
#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 two
//
#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 will be "Grendel the monster". The manipulator ws removes
spaces.
SEE ALSO
basic_istream(3C++std), iostream(3C++std), basic_filebuf(3C++std),
cin(3C++std), cout(3C++std), cerr(3C++std), clog(3C++std), wcout(3C++std),
wcerr(3C++std), wclog(3C++std), ios_base(3C++std), basic_ios(3C++std)
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
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