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strtol, strtoll

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< c‎ | string‎ | byte

 
 
 
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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atof
atoi
atol
atoll
strtol
strtoll
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 <stdlib.h>
long      strtol( const char *str, char **str_end, int base );
long long strtoll( const char *str, char **str_end, int base );
Interpreta um valor inteiro em uma seqüência de bytes apontado por str.
Original:
Interprets an 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) integer number representation and converts them to an integer value. The valid integer value consists of the following parts:

  • (opcional) plus or minus sign
  • (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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Se o str está vazia ou não tem a forma esperada, nenhuma conversão é realizada, e (se não é str_end NULL) o valor de str é armazenado no objeto apontado por str_end.
Original:
If the str is empty or does not have the expected form, no conversion is performed, and (if str_end is not NULL) the value of str is stored in the object pointed to by str_end.
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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
Original:
base of the interpreted integer value
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[editar] Valor de retorno

  • Se for bem sucedido, um valor inteiro correspondente ao conteúdo do str é retornado.
    Original:
    If successful, an integer value corresponding to the contents of str is returned.
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  • Se o valor convertido cai fora do alcance do tipo de retorno correspondente, ocorre um erro de gama (configuração errno para ERANGE) e LONG_MAX, LONG_MIN, LLONG_MAX ou LLONG_MIN é devolvido.
    Original:
    If the converted value falls out of range of corresponding return type, a range error occurs (setting errno to ERANGE) and LONG_MAX, LONG_MIN, LLONG_MAX or LLONG_MIN is returned.
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  • Se nenhuma conversão pode ser executada, é devolvido 0.
    Original:
    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 sem sinal
Original:
converts a byte string to an unsigned integer value
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(função) [edit]
C++ documentation for strtol, strtoll