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

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

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 :

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) [edit]

stoul stoull (C++11) (C++11)	convertit une chaîne en un entier non signé Original: converts a string to an unsigned integer The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) [edit]

stof stod stold (C++11) (C++11) (C++11)	convertit une chaîne en un nombre réel (fonction) [edit]

to_string (C++11)	convertit une valeur entière ou réelle en `string` (fonction) [edit]