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    std::stof, std::stod, std::stold

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    <metanoindex/>

     
    C++
     
    Bibliothque de chanes de caractres
    Chanes zro terminal
    Original:
    Null-terminated strings
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    Les chanes d'octets
    Chaines multi-octets
    Les chanes tendues
    Classes
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    Classes
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    basic_string
    char_traits
     
    std::basic_string
    Les fonctions membres
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    Member functions
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    basic_string::basic_string
    basic_string::operator=
    basic_string::assign
    basic_string::get_allocator
    Elment d'accs
    Original:
    Element access
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    basic_string::at
    basic_string::operator[]
    basic_string::front (C++11)
    basic_string::back (C++11)
    basic_string::data
    basic_string::c_str
    Les itrateurs
    Original:
    Iterators
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    basic_string::begin
    basic_string::cbegin
    (C++11)
    basic_string::end
    basic_string::cend
    (C++11)
    basic_string::rbegin
    basic_string::crbegin
    (C++11)
    basic_string::rend
    basic_string::crend
    (C++11)
    Capacit
    Original:
    Capacity
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    basic_string::empty
    basic_string::size
    basic_string::length
    basic_string::max_size
    basic_string::reserve
    basic_string::capacity
    basic_string::shrink_to_fit (C++11)
    Oprations
    Original:
    Operations
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    basic_string::clear
    basic_string::insert
    basic_string::erase
    basic_string::push_back
    basic_string::pop_back (C++11)
    basic_string::append
    basic_string::operator+=
    basic_string::compare
    basic_string::replace
    basic_string::substr
    basic_string::copy
    basic_string::resize
    basic_string::swap
    Recherche
    Original:
    Search
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    basic_string::find
    basic_string::rfind
    basic_string::find_first_of
    basic_string::find_first_not_of
    basic_string::find_last_of
    basic_string::find_last_not_of
    Constantes
    Original:
    Constants
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    basic_string::npos
    Tiers fonctions
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    Non-member functions
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    operator+
    operator==
    operator!=
    operator<
    operator>
    operator<=
    operator>=
    swap(std::basic_string)
    operator<<
    operator>>
    getline
    stoi
    stol
    stoll    		 (C++11)
    (C++11)
    (C++11)
    stoul
    stoull    		 (C++11)
    (C++11)
    stof
    stod
    stold    		 (C++11)
    (C++11)
    (C++11)
    to_string (C++11)
    to_wstring (C++11)
    Classes d'aide
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    Helper classes
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    hash<std::string>
    hash<std::wstring>
    hash<std::u32string>
    hash<std::u16string>    		 (C++11)
     
    <tbody> </tbody>
    Dclar dans l'en-tte <string>
    float stof( const std::string& str, size_t *pos = 0 );
    		 (1) (depuis C++11)
    double stod( const std::string& str, size_t *pos = 0 );
    		 (2) (depuis C++11)
    long double stold( const std::string& str, size_t *pos = 0 );
    		 (3) (depuis C++11)
    Interprter une valeur virgule flottante dans un str chane .
    Original:
    Interprets a floating point value in a string str.
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    Fonction supprime les caractres blancs (tel que dtermin par std::isspace()) jusqu'au premier caractre non-blanc est trouv. Ensuite, il faut autant de caractres que possible pour former une reprsentation en virgule flottante valide et les convertit en valeur virgule flottante. La valeur du point flottante valide peut tre l'un des suivants:
    Original:
    Function discards any whitespace characters (as determined by std::isspace()) until first non-whitespace character is found. Then it takes as many characters as possible to form a valid floating point representation and converts them to floating point value. The valid floating point value can be one of the following:
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    • dcimal expression en virgule flottante. Il se compose des lments suivants:
      Original:
      decimal floating point expression. It consists of the following parts:
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    • (en option) signe plus ou moins
      Original:
      (en option) plus or minus sign
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    • squence non vide de chiffres dcimaux contenant ventuellement un point dcimal (dfinit mantisse)
      Original:
      nonempty sequence of decimal digits optionally containing a decimal point character (defines significand)
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    • (en option) e ou E suivi avec moins optionnels ou signe plus et la squence non vide de chiffres dcimaux (dfinit exposant)
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      (en option) e or E followed with optional minus or plus sign and nonempty sequence of decimal digits (defines exponent)
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    • expression binaire virgule flottante. Il se compose des lments suivants:
      Original:
      binary floating point expression. It consists of the following parts:
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    • (en option) signe plus ou moins
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      (en option) plus or minus sign
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    • 0x or 0X
    • squence non vide de chiffres hexadcimaux contenant ventuellement un point dcimal (dfinit mantisse)
      Original:
      nonempty sequence of hexadecimal digits optionally containing a decimal point character (defines significand)
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    • (en option) p ou P suivi avec moins optionnels ou signe plus et la squence non vide de chiffres hexadcimaux (dfinit exposant)
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      (en option) p or P followed with optional minus or plus sign and nonempty sequence of hexadecimal digits (defines exponent)
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    • l'infini expression. Il se compose des lments suivants:
      Original:
      infinity expression. It consists of the following parts:
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    • (en option) signe plus ou moins
      Original:
      (en option) plus or minus sign
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    • INF ou INFINITY ignorant la casse
      Original:
      INF or INFINITY ignoring case
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    • un nombre non-expression. Il se compose des lments suivants:
      Original:
      not-a-number expression. It consists of the following parts:
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    • (en option) signe plus ou moins
      Original:
      (en option) plus or minus sign
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    • NAN ou NAN(' char_sequence ) en ignorant la casse de la partie NAN. Char_sequence' ne peut contenir que des caractres alphanumriques. Le rsultat est une valeur virgule flottante NaN calme .
      Original:
      NAN or NAN(char_sequence) ignoring case of the NAN part. char_sequence can only contain alphanumeric characters. The result is a quiet NaN floating point value.
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    L'indice du premier caractre non converti est stock dans pos. Si NULL est pass comme pos, il est ignor .
    Original:
    The index of the first unconverted character is stored in pos. If NULL is passed as pos, it is ignored.
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    Paramtres

    str -
    la chane convertir
    Original:
    the string to convert
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    pos -
    traiter de nombre entier pour stocker l'index du premier caractre non converti
    Original:
    address of integer to store the index of the first unconverted character
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    Retourne la valeur

    La chane convertie vers le type spcifi en virgule flottante .
    Original:
    The string converted to the specified floating point type.
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    Exceptions

    std::invalid_argument si aucune conversion peut tre effectue
    Original:
    std::invalid_argument if no conversion could be performed
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    std::out_of_range si la valeur convertie tomberait hors de la plage du type de rsultat .
    Original:
    std::out_of_range if the converted value would fall out of the range of the result type.
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    Voir aussi

    (C++11)
    (C++11)
    (C++11)
    convertit une chane en un entier sign
    Original:
    converts a string to an signed integer
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    (fonction) [edit]
    (C++11)
    (C++11)
    convertit une chane en un entier non sign
    Original:
    converts a string to an unsigned integer
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    (fonction) [edit]
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