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std::basic_stringbuf::str — cppreference.com

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`std::basic_string<CharT, Traits, Allocator> str() const;`	(1)
`void str( const std::basic_string<CharT, Traits, Allocator>& s);`	(2)

Obtient et définit la chaîne sous-jacente .

Original:

Gets and sets the underlying string.

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1)

Crée et retourne un objet std::basic_string contenant une copie de cette séquence std::basic_stringbuf le caractère sous-jacent. Pour l'entrée-seulement les flux, la chaîne retournée contient les caractères de l'[eback(), egptr()) gamme. Pour les flux d'entrée / sortie ou de sortie uniquement, contient les caractères de pbase() le dernier caractère de la séquence indépendamment de egptr() et epptr() .

Original:

Creates and returns a std::basic_string object containing a copy of this std::basic_stringbuf's underlying character sequence. For input-only streams, the returned string contains the characters from the range [eback(), egptr()). For input/output or output-only streams, contains the characters from pbase() to the last character in the sequence regardless of egptr() and epptr().

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2)

Supprime la séquence de caractères entier sous-jacente de cette std::basic_stringbuf puis configure une nouvelle séquence de caractères sous-jacent contenant une copie du contenu de s. Les pointeurs de std::basic_streambuf sont initialisées comme suit:

Original:

Deletes the entire underlying character sequence of this std::basic_stringbuf and then configures a new underlying character sequence containing a copy of the contents of s. The pointers of std::basic_streambuf are initialized as follows:

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Pour les flux d'entrée (mode & ios_base::in == true), eback() points au premier caractère, gptr() == eback() et egptr() == eback() + s.size(): l'entrée suivante va lire le premier caractère copié à partir s .

Original:

For input streams (mode & ios_base::in == true), eback() points at the first character, gptr() == eback(), and egptr() == eback() + s.size(): the subsequent input will read the first character copied from s.

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Pour les flux de sortie (mode & ios_base::out == true), pbase() points au premier caractère et epptr() >= pbase() + s.size() (epptr est autorisé à pointer loin pour que le sputc() suivante serait pas immédiatement overflow())

Original:

For output streams (mode & ios_base::out == true), pbase() points at the first character and epptr() >= pbase() + s.size() (epptr is allowed to point farther so that the following sputc() wouldn't immediately call overflow())

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Pour les flux append (mode & ios_base::ate == true), pptr() == pbase() + s.size(), de sorte que la sortie suivante sera ajouté au dernier caractère copié à partir s (depuis C++11)

Original:

For append streams (mode & ios_base::ate == true), pptr() == pbase() + s.size(), so that subsequent output will be appended to the last character copied from s (depuis C++11)

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Pour aucun-ajout flux de sortie, pptr() == pbase(), de sorte que la production subséquente écrasera les caractères copiés à partir s .

Original:

For no-appending output streams, pptr() == pbase(), so that subsequent output will overwrite the characters copied from s.

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Paramètres

s

-

un objet chaîne de caractères contenant la séquence de caractères de remplacement

Original:

a string object holding the replacement character sequence

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Retourne la valeur

1)

Un objet chaîne contenant une copie de cette séquence tampon de caractère sous-jacent .

Original:

A string object holding a copy of this buffer's underlying character sequence.

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2)

(Aucun)

Original:

(none)

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Notes

Cette fonction est généralement accessible via std::basic_stringstream::str() .

Original:

This function is typically accessed through std::basic_stringstream::str().

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Exemple

#include <sstream>
#include <iostream>
int main()
{
    int n;

    std::istringstream in;  // could also use in("1 2")
    in.rdbuf()->str("1 2"); // set the get area
    in >> n;
    std::cout << "after reading the first int from \"1 2\", the int is " 
              << n << ", str() = \"" << in.rdbuf()->str() << "\"\n"; // or in.str()

    std::ostringstream out("1 2");
    out << 3;
    std::cout << "after writing the int '3' to output stream \"1 2\""
              << ", str() = \"" << out.str() << "\"\n";

    std::ostringstream ate("1 2", std::ios_base::ate); // C++11
    ate << 3;
    std::cout << "after writing the int '3' to append stream \"1 2\""
              << ", str() = \"" << ate.str() << "\"\n";
}

Résultat :

after reading the first int from "1 2", the int is 1, str() = "1 2"
after writing the int '3' to output stream "1 2", str() = "3 2"
after writing the int '3' to append stream "1 2", str() = "1 23"

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique de `std::basic_stringstream`) [edit]