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strtoul, strtoull

De cppreference.com
< c‎ | string‎ | byte

 
 
 
Chaînes d'octets à zéro terminal
Fonctions
Original:
Functions
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Manipulation caractère
Original:
Character manipulation
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Conversion aux formats numériques
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Conversions to numeric formats
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strtoul
strtoull
strtof
strtod
strtold
La manipulation de chaînes
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
Examen chaîne
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String examination
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Manipulation de la mémoire
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Divers
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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 );
Interpréter une valeur d'entier non signé dans une chaîne d'octets pointée par 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

  • (en option) prefix (0) indicating octal base (applies only when the base is 8)
  • (en option) 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.

Les fonctions définit le pointeur pointé par str_end pour pointer vers le caractère passé le dernier caractère interprété. Si str_end est NULL, il est ignoré .
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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Sommaire

[modifier] Paramètres

str -
pointeur vers la chaîne d'octets terminée par NULL doit être interprété
Original:
pointer to the null-terminated byte string to be interpreted
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str_end -
pointeur vers un pointeur sur caractère .
Original:
pointer to a pointer to character.
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base -
Base de la valeur entière interprété
Original:
base of the interpreted integer value
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[modifier] Retourne la valeur

Valeur entière correspondant au contenu de str en cas de succès. Si la valeur convertie tombe hors de la plage de type de retour correspondante, une erreur se produit et ULONG_MAX plage ou ULLONG_MAX est retourné. Si aucune conversion peut être effectuée, 0 est retourné .
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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[modifier] Exemple

[modifier] Voir aussi

convertit une chaîne d'octets en une valeur entière
Original:
converts a byte string to an integer value
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(fonction) [edit]
convertit une chaîne d'octets en une valeur entière
Original:
converts a byte string to an integer value
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(fonction) [edit]
C++ documentation for strtoul