std::strtol, std::strtoll

 

C++

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Concepts

Bibliothèque d'utilitaires

Bibliothèque pour les chaînes de caractères

Bibliothèque de conteneurs

Bibliothèque d'algorithmes

Bibliothèque d'itérateurs

Bibliothèque pour le calcul numérique

Bibliothèque pour les entrées/sorties

Bibliothèque pour la régionalisation

Bibliothèque pour les expressions régulières (C++11)

Bibliothèque pour les opérations atomiques (C++11)

Bibliothèque pour les processus légers (threads) (C++11)

 

Bibliothèque de chaînes de caractères

Chaînes à zéro terminal Original: Null-terminated strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Les chaînes d'octets

Chaines multi-octets

Les chaînes étendues

Classes Original: Classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string

char_traits

 

Chaînes d'octets à zéro terminal

Fonctions Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Manipulation caractère Original: Character manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
isalnum isalpha islower isupper isdigit isxdigit isblank (C++11)	iscntrl isgraph isspace isprint ispunct tolower toupper
Conversion aux formats numériques Original: Conversions to numeric formats The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
atof atoi atol atoll strtol strtoll	strtoul strtoull strtof strtod strtold
La manipulation de chaînes Original: String manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strcpy
strncpy
strcat
strncat
strxfrm
Examen chaîne Original: String examination The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strlen strcmp strncmp strcoll strchr strrchr	strspn strcspn strpbrk strstr strtok
Manipulation de la mémoire Original: Memory manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
memchr
memcmp
memset
memcpy
memmove
Divers Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strerror

 

Defined in header <cstdlib>
long      strtol( const char *str, char **str_end, int base );
long long strtoll( const char *str, char **str_end, int base );		(depuis C++11)

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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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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
str_end	-	pointeur vers un pointeur sur caractère . Original: pointer to a pointer to character. The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
base	-	Base de la valeur entière interprété Original: base of the interpreted integer value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 ([[cpp/error/errno|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 [[cpp/error/errno|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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Voir aussi

atoi atol atoll	convertit une chaîne d'octets en une valeur entière Original: converts a byte string to an integer value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction)
strtoul strtoull	convertit une chaîne d'octets à une valeur d'entier non signé Original: converts a byte string to an unsigned integer value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction)
C documentation for strtol, strtoll