Namespace
Varianti

strtoul, strtoull

Da cppreference.com.
< c‎ | string‎ | byte

 
 
 
Null-stringhe terminate byte
Funzioni
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Functions
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Carattere manipolazione
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Character manipulation
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Le conversioni in formati numerici
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Conversions to numeric formats
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strtoul
strtoull
strtof
strtod
strtold
Della gestione delle stringhe
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
String esame
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String examination
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Memoria manipolazione
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Varie
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Miscellaneous
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strerror
 
Defined in header <stdlib.h>
unsigned long      strtoul( const char *str, char **str_end, int base );
unsigned long long strtoull( const char *str, char **str_end, int base );
Interpreta un valore intero in una stringa di byte puntato da str.
Original:
Interprets an unsigned integer value in a byte string pointed to by str.
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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 str_end per puntare al carattere dopo l'ultimo carattere interpretato. Se str_end è NULL, viene ignorato.
Original:
The functions sets the pointer pointed to by str_end to point to the character past the last character interpreted. If str_end is NULL, it is ignored.
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Indice

[modifica] Parametri

str -
puntatore alla stringa con terminazione null byte da interpretare
Original:
pointer to the null-terminated byte string to be interpreted
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str_end -
puntatore a un puntatore a carattere .
Original:
pointer to a pointer to character.
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base -
Base del valore intero interpretato
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base of the interpreted integer value
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[modifica] 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 ULONG_MAX o ULLONG_MAX viene restituito. 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 ULONG_MAX or ULLONG_MAX is returned. If no conversion can be performed, 0 is returned.
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[modifica] Esempio

[modifica] Vedi anche

converte una stringa di byte in un valore intero
Original:
converts a byte string to an integer value
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(funzione) [edit]
converte una stringa di byte in un valore intero
Original:
converts a byte string to an integer value
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(funzione) [edit]
C++ documentation for strtoul