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std::stoul, std::stoull - cppreference.com

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Elemento definito nell'header

<string>

unsigned long stoul( const std::string& str, size_t *pos = 0, int base = 10 );

 (1) (dal C++11)

unsigned long long stoull( const std::string& str, size_t *pos = 0, int base = 10 );

 (2) (dal C++11)

Interpreta un valore intero nella stringa str.

Original:

Interprets an unsigned 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) unsigned integer number representation and converts them to an integer value. The valid unsigned integer value consists of the following parts: None

  • (opzionale) prefix (0) indicating octal base (applies only when the base is 8)
  • (opzionale) 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 del primo carattere non convertito viene memorizzato in pos. Se NULL viene passato come pos, viene ignorato.

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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Parametri

str -

la stringa da convertire

Original:

the string to convert

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pos -

indirizzo di un numero intero per archiviare l'indice del primo carattere non convertito

Original:

address of an integer to store the index of the first unconverted character

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base -

la base numerica

Original:

the number base

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Valore di ritorno

La stringa convertito nel tipo specificato intero senza segno.

Original:

The string converted to the specified unsigned integer type.

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Eccezioni

  • std::invalid_argument se la conversione non può essere eseguita

    Original:

    std::invalid_argument if no conversion could be performed

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  • std::out_of_range se il valore convertito cadere fuori del campo del tipo di risultato.

    Original:

    std::out_of_range if the converted value would fall out of the range of the result type.

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Vedi anche