std::strtoul, std::strtoull – cppreference.com

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definiert in Header `<cstdlib>`

`unsigned long strtoul( const char str, char *str_end, int base );`

`unsigned long long strtoull( const char str, char *str_end, int base );`		(seit C++11)

Legt einen vorzeichenlosen Integer-Wert in einem Byte-String, auf den str .

Original:

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

(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_end NULL 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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Parameter

str	-	Zeiger auf die null-terminierte Byte-String interpretiert werden Original: pointer to the null-terminated byte string to be interpreted The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
str_end	-	Zeiger auf einen Zeiger auf ein Zeichen . Original: pointer to a pointer to character. The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
base	-	Base der interpretierten Integer-Wert Original: base of the interpreted integer value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Rückgabewert

Integer-Wert entsprechend dem Inhalt der str auf Erfolg. Wenn der umgewandelte Wert fällt außerhalb der Reichweite des zugehörigen Rückgabetyp tritt Entfernungsfehlers und ULONG_MAX oder ULLONG_MAX zurückgegeben. Wenn keine Umwandlung durchgeführt werden kann, wird zurückgegeben 0 .

Original:

Integer value corresponding to the contents of str on success. If the converted value falls out of range of corresponding return type, range error occurs and ULONG_MAX or ULLONG_MAX is returned. If no conversion can be performed, 0 is returned.

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Beispiel

Siehe auch


atoi atol atoll	wandelt ein Byte-String in einen ganzzahligen Wert 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. (Funktion) [edit]

strtol strtoll	wandelt ein Byte-String in einen ganzzahligen Wert 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. (Funktion) [edit]

C documentation for strtoul, strtoull