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    std::strtol, std::strtoll

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    <metanoindex/>

     
    C++
     
    Bibliothque de chanes de caractres
    Chanes zro terminal
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    Null-terminated strings
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    Les chanes d'octets
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    Chanes d'octets zro terminal
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    Manipulation caractre
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    <tbody> </tbody>
    Dclar dans l'en-tte <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)
    Interprter une valeur entire dans une chane d'octets pointe 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 dfinit le pointeur point par str_end pour pointer vers le caractre pass le dernier caractre interprt. Si str_end est NULL, il est ignor .
    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 effectue, et (si str_end n'est pas NULL) la valeur de str est stocke dans l'objet point 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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    Paramtres

    str -
    pointeur vers la chane d'octets termine par NULL doit tre interprt
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    pointer to the null-terminated byte string to be interpreted
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    str_end -
    pointeur vers un pointeur sur caractre .
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    pointer to a pointer to character.
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    base -
    Base de la valeur entire interprt
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    base of the interpreted integer value
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    Retourne la valeur

    • En cas de succs, une valeur entire correspondant au contenu de str est retourn .
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      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]] rglage de ERANGE) et LONG_MAX, LONG_MIN, LLONG_MAX ou LLONG_MIN est retourn .
      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 tre effectue, 0 est retourn .
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      If no conversion can be performed, 0 is returned.
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    Exemple

    This section is incomplete
    Reason: no example

    Voir aussi
    convertit une chane d'octets en une valeur entire
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    converts a byte string to an integer value
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    (fonction) [edit]
    convertit une chane d'octets une valeur d'entier non sign
    Original:
    converts a byte string to an unsigned integer value
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    (fonction) [edit]
    C documentation for strtol, strtoll
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