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std::strtoul, std::strtoull

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< cpp‎ | string‎ | byte

 
 
Strings biblioteca
Terminadas en nulo
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Null-terminated strings
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Cadenas de bytes
Multibyte cuerdas
Cadenas anchas
Clases
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Classes
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basic_string
char_traits
 
Terminadas en nulo de bytes
Funciones
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Functions
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De manipulación de caracteres
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Character manipulation
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Las conversiones a formatos numéricos
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Conversions to numeric formats
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strtoul
strtoull
strtof
strtod
strtold
Cadena de manipulación
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
Cadena examen
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String examination
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Memoria manipulación
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Varios
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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 );
(desde C++11)
Interpreta un valor entero sin signo en una cadena byte apuntado 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.

Las funciones establece el puntero que apunta str_end para que apunte al carácter allá del último carácter interpretado. Si str_end es NULL, se omite .
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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Contenido

[editar] Parámetros

str -
puntero a la cadena terminada en null byte debe ser interpretado
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pointer to the null-terminated byte string to be interpreted
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str_end -
puntero a un puntero a caracter .
Original:
pointer to a pointer to character.
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base -
Base del valor entero interpretado
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base of the interpreted integer value
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[editar] Valor de retorno

Valor entero correspondiente al contenido de str en caso de éxito. Si el valor convertido cae fuera del rango del tipo de cambio correspondiente, se produce error de rango y ULONG_MAX o ULLONG_MAX devuelve. Si la conversión no se puede realizar, 0 se devuelve .
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] Ejemplo

[editar] Ver también

convierte una cadena de bytes en un valor entero
Original:
converts a byte string to an integer value
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(función) [edit]
convierte una cadena de bytes en un valor entero
Original:
converts a byte string to an integer value
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(función) [edit]
C documentation for strtoul, strtoull