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strtol, strtoll

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< c‎ | string‎ | byte

 
 
 
Chaînes d'octets à zéro terminal
Fonctions
Original:
Functions
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Manipulation caractère
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Character manipulation
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Conversion aux formats numériques
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Conversions to numeric formats
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atof
atoi
atol
atoll
strtol
strtoll
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>
long      strtol( const char *str, char **str_end, int base );
long long strtoll( const char *str, char **str_end, int base );
Interpréter une valeur entière dans une chaîne d'octets pointée par 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:

  • (en option) plus or minus sign
  • (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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Si le str est vide ou n'a pas la forme attendue, aucune conversion n'est effectuée, et (si str_end n'est pas NULL) la valeur de str est stockée dans l'objet pointé par 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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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

  • En cas de succès, une valeur entière correspondant au contenu de str est retourné .
    Original:
    If successful, an integer value corresponding to the contents of str is returned.
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  • Si la valeur convertie tombe hors de la plage de type de retour correspondante, une erreur d'intervalle se produit (errno réglage de ERANGE) et LONG_MAX, LONG_MIN, LLONG_MAX ou LLONG_MIN est retourné .
    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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  • Si aucune conversion peut être effectuée, 0 est retourné .
    Original:
    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 à une valeur d'entier non signé
Original:
converts a byte string to an unsigned integer value
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(fonction) [edit]
C++ documentation for strtol, strtoll