std::wcstoimax, std::wcstoumax

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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>
std::intmax_t wcstoimax( const wchar_t* nptr, wchar_t** endptr, int base);		(dal C++11)
std::uintmax_t wcstoumax( const wchar_t* nptr, wchar_t** endptr, int base);		(dal C++11)

Interpreta un valore intero in una stringa larga puntata da nptr.

Original:

Interprets an unsigned integer value in a wide string pointed to by nptr.

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Function discards any whitespace characters until first non-whitespace character is found. Then it takes as many characters as possible to form a valid base-n (where n=base) unsigned integer number representation and converts them to an integer value. The valid unsigned integer value consists of the following parts: None

• (opzionale) prefix (0) indicating octal base (applies only when the base is 8)
• (opzionale) prefix (0x or 0X) indicating hexadecimal base (applies only when the base is 16)
• a sequence of digits

The set of valid digits for base-2 integer is 01, for base-3 integer is 012, and so on. For bases larger than 10, valid digits include alphabetic characters, starting from Aa for base-11 integer, to Zz for base-36 integer. The case of the characters is ignored.

Le funzioni imposta il puntatore puntato da endptr per puntare al carattere esteso oltre l'ultimo carattere interpretato. Se endptr è NULL, viene ignorato.

Original:

The functions sets the pointer pointed to by endptr to point to the wide character past the last character interpreted. If endptr is NULL, it is ignored.

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Parametri

nptr	-	puntatore alla stringa con terminazione null grande per essere interpretato Original: pointer to the null-terminated wide string to be interpreted The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
endptr	-	puntatore a un puntatore a un carattere ampio . Original: pointer to a pointer to a wide character. The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
base	-	Base del valore intero interpretato Original: base of the interpreted integer value 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

Valore intero che corrisponde al contenuto di str in caso di successo. Se il valore convertito cade fuori dalla portata del corrispondente tipo di ritorno, errore di campo si verifica e INTMAX_MAX, INTMAX_MIN, UINTMAX_MAX o 0 viene restituito, a seconda dei casi. Se la conversione non può essere eseguita, viene restituito 0.

Original:

Integer value corresponding to the contents of str on success. If the converted value falls out of range of corresponding return type, range error occurs and INTMAX_MAX, INTMAX_MIN, UINTMAX_MAX, or 0 is returned, as appropriate. If no conversion can be performed, 0 is returned.

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Esempio

#include <iostream>
#include <string>
#include <cinttypes>

int main()
{
    std::wstring str = L"helloworld";
    std::intmax_t val = std::wcstoimax(str.c_str(), nullptr, 36);
    std::wcout << str << " in base 36 is " << val << " in base 10\n";

    wchar_t* nptr;
    val = std::wcstoimax(str.c_str(), &nptr, 30);
    if(nptr != &str[0] + str.size())
        std::wcout << str << " in base 30 is invalid."
                  << " The first invalid digit is " << *nptr << '\n';
}

Output:

helloworld in base 36 is 1767707668033969 in base 10
helloworld in base 30 is invalid. The first invalid digit is w

Vedi anche

strtoimax strtoumax (C++11) (C++11)	converte una stringa di byte di std::intmax_t o std::uintmax_t Original: converts a byte string to std::intmax_t or std::uintmax_t The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
wcstol wcstoll	converte una stringa in largo per un valore intero Original: converts a wide string to an integer value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
wcstoul wcstoull	converte una stringa in largo per un valore intero senza segno Original: converts a wide string to an unsigned integer value 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 wcstoimax, wcstoumax