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std::strtoul, std::strtoull

Da cppreference.com
< cpp‎ | string‎ | byte

 
 
Biblioteca cordas
Strings terminadas
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Null-terminated strings
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Cadeias de bytes
Multibyte cordas
Cordas de largura
Classes
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Classes
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basic_string
char_traits
 
Cordas de terminação nula de bytes
Funções
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Functions
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Manipulação personagem
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Character manipulation
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Conversões para formatos numéricos
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Conversions to numeric formats
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strtoul
strtoull
strtof
strtod
strtold
Manipulação de cadeia
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
Exame String
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String examination
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Manipulação de memória
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Diversos
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Miscellaneous
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strerror
 
Defined in header <cstdlib>
unsigned long      strtoul( const char *str, char **str_end, int base );
unsigned long long strtoull( const char *str, char **str_end, int base );
(a partir do 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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Índice

[editar] Parâmetros

str -
ponteiro para o byte string terminada em nulo para ser interpretado
Original:
pointer to the null-terminated byte string to be interpreted
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str_end -
ponteiro para um ponteiro para caracter .
Original:
pointer to a pointer to character.
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base -
Base do valor inteiro interpretado
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base of the interpreted integer value
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[editar] 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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[editar] Exemplo

[editar] Veja também

converte uma seqüência de byte para um valor inteiro
Original:
converts a byte string to an integer value
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(função) [edit]
converte uma seqüência de byte para um valor inteiro
Original:
converts a byte string to an integer value
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(função) [edit]
C documentation for strtoul, strtoull