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    std::strtol, std::strtoll

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    < cpp‎ | string‎ | byte

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    C++
     
    Strings Bibliothek
    Null-terminierte Strings
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    Null-terminated strings
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    Byte-Strings
    Multibyte-Strings
    Wide Strings
    Classes
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    Classes
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    basic_string
    char_traits
     
    Null-terminierte Byte-Strings
    Funktionen
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    Functions
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    Character Manipulation
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    Character manipulation
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    Umwandlungen in numerische Formate
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    Conversions to numeric formats
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    atof
    atoi
    atol
    atoll
    strtol
    strtoll
    String-Manipulation
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    String manipulation
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    strcpy
    strncpy
    strcat
    strncat
    strxfrm
    String Prüfung
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    String examination
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    Speicher Manipulation
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    Memory manipulation
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    memchr
    memcmp
    memset
    memcpy
    memmove
    Verschiedenes
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    Miscellaneous
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    strerror
     
    definiert in Header <cstdlib>
    long      strtol(constchar*str, char**str_end, int base );
    longlong strtoll(constchar*str, char**str_end, int base );
    		(seit C++11)
    Legt einen Integer-Wert in einem Byte String, auf den 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:

    • (optional) plus or minus sign
    • (optional) prefix (0) indicating octal base (applies only when the base is 8)
    • (optional) 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.

    Die Funktionen setzt den Zeiger auf die durch str_end auf das Zeichen nach dem letzten Zeichen interpretiert zeigen. Wenn str_endNULL ist, wird es ignoriert .
    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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    Wenn die str ist leer oder nicht die erwartete Form, wird keine Konvertierung durchgeführt, und (wenn str_end nicht NULL) der Wert str im Objekt, auf das str_end gespeichert .
    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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    Inhaltsverzeichnis

    [Bearbeiten]Parameter

    str -
    Zeiger auf die null-terminierte Byte-String interpretiert werden
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    pointer to the null-terminated byte string to be interpreted
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    str_end -
    Zeiger auf einen Zeiger auf ein Zeichen .
    Original:
    pointer to a pointer to character.
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    base -
    Base der interpretierten Integer-Wert
    Original:
    base of the interpreted integer value
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    [Bearbeiten]Rückgabewert

    • Wenn dies gelingt, ist ein ganzzahliger Wert entsprechend dem Inhalt des str zurückgegeben .
      Original:
      If successful, an integer value corresponding to the contents of str is returned.
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    • Wenn der umgewandelte Wert fällt außerhalb der Reichweite des zugehörigen Rückgabetyp, tritt ein Fehler Bereich (Einstellung [[cpp/error/errno|errno]] um ERANGE) und LONG_MAX, LONG_MIN, LLONG_MAX oder LLONG_MIN zurückgegeben .
      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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    • Wenn keine Umwandlung durchgeführt werden kann, wird zurückgegeben ​0​ .
      Original:
      If no conversion can be performed, ​0​ is returned.
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    [Bearbeiten]Beispiel

    This section is incomplete
    Reason: no example

    [Bearbeiten]Siehe auch

    wandelt ein Byte-String in einen ganzzahligen Wert
    Original:
    converts a byte string to an integer value
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    (Funktion)[edit]
    wandelt ein Byte-String in einen vorzeichenlosen Integer-Wert
    Original:
    converts a byte string to an unsigned integer value
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    (Funktion)[edit]
    C documentation for strtol, strtoll
    Von „https://de.cppreference.com/mwiki/index.php?title=cpp/string/byte/strtol&oldid=29976“
    close