cin (3C++std) - Tru64 UNIX
Standard C++ LibraryCopyright 1996, Rogue Wave Software, Inc. NAME
cin
SYNOPSIS
#include <iostream>
extern istream cin;
DESCRIPTION
istream cin;
The object cin 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 you can improve performance by using the
ios_base member function synch_with_stdio to desynchronize them.
After the object cin is initialized, cin.tie() returns &cout, which
implies that cin and cout are synchronized.
EXAMPLES
//
// cin example one
//
#include <iostream>
void main ( )
{
using namespace std;
int i;
float f;
char c;
//read an integer, a float and a character from stdin
cin >> i >> f >> c;
// output i, f and c to stdout
cout << i << endl << f << endl << c << endl;
}
//
// cin example two
//
#include <iostream>
void main ( )
{
using namespace std;
char p[50];
// remove all the white spaces
cin >> ws;
// read characters from stdin until a newline
// or 49 characters have been read
cin.getline(p,50);
// output the result to stdout
cout << 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),
cout(3C++std), cerr(3C++std), clog(3C++std), wcin(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 27.3.1
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
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