std::stoi, std::stol, std::stoll — cppreference.com
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    std::stoi, std::stol, std::stoll

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    <metanoindex/>

     
    C++
     
    Bibliothèque de chaînes de caractères
    Chaînes à zéro terminal
    Original:
    Null-terminated strings
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    Les chaînes d'octets
    Chaines multi-octets
    Les chaînes étendues
    Classes
    Original:
    Classes
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    basic_string
    char_traits
     
    std::basic_string
    Les fonctions membres
    Original:
    Member functions
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    basic_string::basic_string
    basic_string::operator=
    basic_string::assign
    basic_string::get_allocator
    Elément d'accès
    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 itérateurs
    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)
    Capacité
    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)
    Opérations
    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
    Original:
    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
    Original:
    Helper classes
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    hash<std::string>
    hash<std::wstring>
    hash<std::u32string>
    hash<std::u16string>    		 (C++11)
     
    <tbody> </tbody>
    Déclaré dans l'en-tête <string>
    int stoi( const std::string& str, size_t *pos = 0, int base = 10 );
    		 (1) (depuis C++11)
    long stol( const std::string& str, size_t *pos = 0, int base = 10 );
    		 (2) (depuis C++11)
    long long stoll( const std::string& str, size_t *pos = 0, int base = 10 );
    		 (3) (depuis C++11)
    Interpréter une valeur entière signée dans la str chaîne .
    Original:
    Interprets a signed integer value in the string 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.

    L'indice du premier caractère non converti est stocké dans pos. Si NULL est passé comme pos, il est ignoré .
    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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    Paramètres

    str -
    la chaîne à convertir
    Original:
    the string to convert
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    pos -
    l'adresse d'un nombre entier pour stocker l'index du premier caractère non converti
    Original:
    address of an integer to store the index of the first unconverted character
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    base -
    le nombre de base
    Original:
    the number base
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    Retourne la valeur

    La chaîne convertie dans le type spécifié en entier signé .
    Original:
    The string converted to the specified signed integer type.
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    Exceptions

    • std::invalid_argument si aucune conversion peut être effectuée
      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 résultat .
      Original:
      std::out_of_range if the converted value would fall out of the range of the result type.
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    Exemple

    #include <iostream>
#include <string>

int main()
{
    std::string test = "45";
    int myint = stoi(test);
    std::cout << myint << '\n';
}

    Résultat : 

    45

    Voir aussi