friend specifier

Da cppreference.com.
< cpp‎ | language

 
 
Linguaggio C + +
Temi generali
Original:
General topics
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Controllo del flusso
Original:
Flow control
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Dichiarazioni esecuzione condizionale
Original:
Conditional execution statements
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Iterazione dichiarazioni
Original:
Iteration statements
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Vai dichiarazioni
Original:
Jump statements
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Funzioni
Original:
Functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
dichiarazione di funzione
lambda funzione dichiarazione
funzione di modello
specificatore inline
eccezioni specifiche(deprecato)
noexcept specificatore(C++11)
Eccezioni
Original:
Exceptions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Spazi dei nomi
Original:
Namespaces
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Tipi
Original:
Types
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
decltype specifier(C++11)
Specifiers
Original:
Specifiers
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
cv specificatori
Durata di stoccaggio specificatori
constexpr specificatore(C++11)
specificatore auto(C++11)
alignas specificatore(C++11)
Inizializzazione
Original:
Initialization
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Letterali
Original:
Literals
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Espressioni
Original:
Expressions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
rappresentazioni alternative
Utilities
Original:
Utilities
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Tipi
Original:
Types
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
typedef declaration
Tipo alias dichiarazione(C++11)
attributi(C++11)
Lancia
Original:
Casts
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
conversioni implicite
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
Fusione C-stile e funzionale
Occupazione della memoria
Original:
Memory allocation
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Classi
Original:
Classes
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
amico specificatore
liste di inizializzazione
Specifiche per una classe di funzioni proprietà
Original:
Class-specific function properties
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Funzioni membro speciali
Original:
Special member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Modelli
Original:
Templates
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
classe template
funzione di modello
modello di specializzazione
parametri confezioni(C++11)
Varie
Original:
Miscellaneous
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Montaggio in linea
 

[modifica]Descrizione

La parola chiave amico viene utilizzato per consentire l'accesso ai membri della classe al di fuori della classe. Ad esempio, si supponga che la classe ha membri private o protected. È possibile accedere a questi componenti solo dalla stessa classe o di classi derivate, rispettivamente. Usando la parola chiave amico di concedere l'accesso ai membri privati ​​e protetti della classe alla funzione di amico o di una classe amico. Alcuni degli usi più comuni sono l'amico >> << operatore e funzioni dell'operatore e la funzione di swap.
Original:
The friend keyword is used to grant access to class members from outside of the class. For example, suppose your class has private or protected members. You can access these members only from the same class or derived classes respectively. By using the friend keyword you grant access to the private and protected members of your class to the friend function or a friend class. Some of the more common uses of friend are the operator>> and operator<< functions and the swap function.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[modifica]Esempio uso

friend ostream& operator<<(ostream& out, const T& o);friend istream& operator>>(istream& in, T& o);friend swap(T& left, T& right);


close