std::strtoul, std::strtoull - cppreference.com

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Definido no cabeçalho `<cstdlib>`

`unsigned long strtoul( const char str, char *str_end, int base );`

`unsigned long long strtoull( const char str, char *str_end, int base );`		(desde C++11)

Interpreta um valor inteiro sem sinal em uma seqüência de bytes apontado por 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

(opcional) prefix (0) indicating octal base (applies only when the base is 8)
(opcional) 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.

As funções define o ponteiro apontado pelo str_end para apontar para o caráter passado o último personagem interpretado. Se str_end é NULL, ele é ignorado.

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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Parâmetros

str	-	ponteiro para o byte string terminada em nulo para ser interpretado Original: pointer to the null-terminated byte 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.
str_end	-	ponteiro para um ponteiro para caracter . Original: pointer to a pointer to 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 do valor inteiro interpretado 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.

Valor de retorno

Valor inteiro correspondente ao conteúdo do str em caso de sucesso. Se o valor convertido cai fora do alcance do tipo de retorno correspondente, o erro ocorre e intervalo ULONG_MAX ou ULLONG_MAX é devolvido. Se nenhuma conversão pode ser executada, é devolvido 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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Exemplo

Veja também


atoi atol atoll	converte uma seqüência de byte para um valor inteiro Original: converts a byte 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. (função) [edit]

strtol strtoll	converte uma seqüência de byte para um valor inteiro Original: converts a byte 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. (função) [edit]

Documentação C para strtoul, strtoull

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