cerr (3C++std) - Tru64 UNIX
Standard C++ LibraryCopyright 1996, Rogue Wave Software, Inc. NAME
cerr
SYNOPSIS
#include <iostream>
extern ostream cerr;
DESCRIPTION
ostream cerr;
The object cerr controls output to an unbuffered stream buffer
associated with the object stderr declared in <cstdio>. By default, the
standard C and C++ streams are synchronized, but you may improve
performance by using the ios_base member function synch_with_stdio to
desynchronize them.
FORMATTING
The formatting is done through member functions or manipulators. See cout
or basic_ostream for details.
EXAMPLES
//
// cerr example
//
#include<iostream>
#include<fstream>
void main ( )
{
using namespace std;
// open the file "file_name.txt"
// for reading
ifstream in("file_name.txt");
// output the all file to stdout
if ( in )
cout << in.rdbuf();
else
// if the ifstream object is in a bad state
// output an error message to stderr
cerr << "Error while opening the file" << endl;
}
SEE ALSO
basic_ostream(3C++std), iostream(3C++std), basic_filebuf(3C++std),
cout(3C++std), cin(3C++std), clog(3C++std), wcin(3C++std), wcout(3C++std),
wcerr(3C++std), wclog(3C++std), iomanip(3C++std), ios_base(3C++std),
basic_ios(3C++std)
Working Paper for Draft Proposed International Standard for Information
Systems--Programming Language C++, Section 27.3.1
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
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