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std::basic_ostringstream::basic_ostringstream

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D'entrée / sortie de bibliothèque
I / O manipulateurs
C-style I / O
Tampons
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf (obsolète)
Cours d'eau
Original:
Streams
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Abstractions
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Fichier E / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Chaîne I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Tableau I / O
Original:
Array I/O
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istrstream (obsolète)
ostrstream (obsolète)
strstream (obsolète)
Types
Original:
Types
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streamoff
streamsize
fpos
Interface catégorie d'erreur
Original:
Error category interface
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iostream_category (C++11)
io_errc (C++11)
 
std::basic_ostringstream
Les fonctions membres
Original:
Member functions
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basic_ostringstream::basic_ostringstream
basic_ostringstream::operator=
basic_ostringstream::swap
basic_ostringstream::rdbuf
Opérations sur les chaînes
Original:
String operations
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basic_ostringstream::str
 
basic_ostringstream( ios_base::openmode mode = ios_base::out );
(1)
basic_ostringstream( const std::basic_string<CharT,Traits,Allocator>& str,
                     ios_base::openmode mode = ios_base::out );
(2)
basic_ostringstream( basic_ostringstream&& other );
(3) (depuis C++11)
Construit flux nouvelle chaîne .
Original:
Constructs new string stream.
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1)
Construit nouveau dispositif de chaîne sous-jacente. L'objet basic_stringbuf sous-jacente est construit comme basic_stringbuf<Char,Traits,Allocator>(mode | ios_base::out).
Original:
Constructs new underlying string device. The underlying basic_stringbuf object is constructed as basic_stringbuf<Char,Traits,Allocator>(mode | ios_base::out).
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2)
Utilise une copie de str comme contenu initial du dispositif de chaîne sous-jacente. L'objet basic_stringbuf sous-jacente est construit comme basic_stringbuf<Char,Traits,Allocator>(str, mode | ios_base::out).
Original:
Uses a copy of str as initial contents of the underlying string device. The underlying basic_stringbuf object is constructed as basic_stringbuf<Char,Traits,Allocator>(str, mode | ios_base::out).
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3)
Déplacez constructeur. Construit le flux de fichier avec l'état de other en utilisant la sémantique de déplacement .
Original:
Move constructor. Constructs the file stream with the state of other using move semantics.
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[modifier] Paramètres

str -
Chaîne à utiliser comme contenu initial du flux de chaîne
Original:
string to use as initial contents of the string stream
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mode -
spécifie le mode de flux ouvert. Il est de type masque, les constantes suivantes sont définies:
Constante
Original:
Constant
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Explanation
app
demander à l'extrémité du flux avant chaque écriture
Original:
seek to the end of stream before each write
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binary
ouvrir en mode binaire
Original:
open in binary mode
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in
ouvrir en lecture
Original:
open for reading
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out
ouvrir en écriture
Original:
open for writing
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trunc
jeter le contenu du courant lors de l'ouverture
Original:
discard the contents of the stream when opening
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ate
demander à l'extrémité du flux immédiatement après ouverture
Original:
seek to the end of stream immediately after open
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Original:
specifies stream open mode. It is bitmask type, the following constants are defined:
Constante
Original:
Constant
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Explanation
app
demander à l'extrémité du flux avant chaque écriture
Original:
seek to the end of stream before each write
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binary
ouvrir en mode binaire
Original:
open in binary mode
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in
ouvrir en lecture
Original:
open for reading
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out
ouvrir en écriture
Original:
open for writing
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trunc
jeter le contenu du courant lors de l'ouverture
Original:
discard the contents of the stream when opening
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ate
demander à l'extrémité du flux immédiatement après ouverture
Original:
seek to the end of stream immediately after open
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other -
une autre source de chaîne à utiliser comme source
Original:
another string stream to use as source
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[modifier] Exemple

#include <iostream>
#include <sstream>
int main()
{
    // default constructor (input/output stream)
    std::stringstream buf1;
    buf1 << 7;
    int n = 0;
    buf1 >> n;
    std::cout << "buf1 = " << buf1.str() << " n = " << n << '\n';
 
    // input stream
    std::istringstream inbuf("-10");
    inbuf >> n;
    std::cout << "n = " << n << '\n';
 
    // output stream in append mode (C++11)
    std::ostringstream buf2("test", std::ios_base::ate);
    buf2 << '1';
    std::cout << buf2.str() << '\n';
}

Résultat :

buf1 = 7 n = 7
n = -10
test1

[modifier] Voir aussi

obtient ou définit le contenu de l'objet chaîne de périphérique sous-jacent
Original:
gets or sets the contents of underlying string device object
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(fonction membre publique) [edit]
construit un objet basic_stringbuf
Original:
constructs a basic_stringbuf object
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(fonction membre publique de std::basic_stringbuf) [edit]