std::wcsncpy

<metanoindex/>

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari (C++11)

Operazioni atomicche (C++11)

Multithreading (C++11)

 

Stringhe libreria

Null-stringhe terminate Original: Null-terminated strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Byte stringhe

Multibyte stringhe

Stringhe larghe

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.

basic_string

char_traits

 

Stringhe larghe null-terminated

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.
Carattere manipolazione Original: Character manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
iswalnum iswalpha iswlower iswupper iswdigit iswxdigit iswblank (C++11) wctype iswctype	iswcntrl iswgraph iswspace iswprint iswpunct towlower towupper wctrans towctrans
Le conversioni in formati numerici Original: Conversions to numeric formats The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
wcstol wcstoll wcstoul wcstoull	wcstof wcstod wcstold
Della gestione delle stringhe Original: String manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
wcslen wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp	wcsxfrm wcschr wcsrchr wcspbrk wcsspn wcscspn wcsstr wcstok
Matrice manipolazione Original: Array manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
wmemcpy
wmemmove
wmemcmp
wmemchr
wmemset

 

<tbody> </tbody>

Elemento definito nell'header <cwchar>
wchar_t *wcsncpy( wchar_t *dest, const wchar_t *src, std::size_t count );

Copie a personaggi più count della stringa puntata da ampia src (incluso il carattere nullo di terminazione grandangolo) a matrice di caratteri gamma puntato da dest.

Original:

Copies at most count characters of the wide string pointed to by src (including the terminating null wide character) to wide character array pointed to by dest.

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Se count viene raggiunto prima della src intera stringa è stata copiata, la matrice risultante di caratteri estesi non è null-terminated.

Original:

If count is reached before the entire string src was copied, the resulting wide character array is not null-terminated.

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Se, dopo aver copiato il carattere nullo di terminazione larga da src, count non viene raggiunto, ulteriori caratteri null larghi vengono scritti dest fino al totale di caratteri count sono stati scritti.

Original:

If, after copying the terminating null wide character from src, count is not reached, additional null wide characters are written to dest until the total of count characters have been written.

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Se le stringhe si sovrappongono, il comportamento non è definito.

Original:

If the strings overlap, the behavior is undefined.

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Parametri

dest	-	puntatore alla matrice di caratteri estesi in cui copiare Original: pointer to the wide character array to copy to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
src	-	puntatore alla stringa ampia da cui copiare Original: pointer to the wide string to copy from The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
count	-	il numero massimo di caratteri larghi da copiare Original: maximum number of wide characters to copy The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

dest

Note

Nell'uso tipico, count è la dimensione della matrice di destinazione.

Original:

In typical usage, count is the size of the destination array.

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Esempio

#include <iostream>
#include <cwchar>

int main()
{
    wchar_t src[] = L"hi";
    wchar_t dest[6] = {L'a', L'b', L'c', L'd', L'e', L'f'};;

    std::wcsncpy(dest, src, 5); // this will copy hi and repeat \0 three times

    std::wcout << "The contents of dest are: ";
    for(wchar_t c : dest) {
        if(c)
            std::wcout << c << ' ';
        else
            std::wcout << "\\0" << ' ';
    }
    std::wcout << '\n';
}

Output:

The contents of dest are: h i \0 \0 \0 f

Vedi anche

wcscpy	copia una stringa larga ad un altro Original: copies one wide string to another The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
wmemcpy	copia un certo numero di caratteri estesi tra due matrici non si sovrappongono Original: copies a certain amount of wide characters between two non-overlapping arrays The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
C documentation for wcsncpy