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strtol, strtoll

提供: cppreference.com
< c‎ | string‎ | byte

 
 
 
NULL終端バイト文字列
機能します
Original:
Functions
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文字操作
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Character manipulation
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数値形式への変換
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Conversions to numeric formats
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atof
atoi
atol
atoll
strtol
strtoll
文字列操作
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
文字列の検査
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String examination
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メモリ操作
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
その他
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Miscellaneous
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strerror
 
Defined in header <stdlib.h>
long      strtol( const char *str, char **str_end, int base );
long long strtoll( const char *str, char **str_end, int base );
strが指すバイト列に整数値を解釈します.
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:

  • (オプション) plus or minus sign
  • (オプション) prefix (0) indicating octal base (applies only when the base is 8)
  • (オプション) 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.

関数は、最後の文字の解釈の文字を指すようにstr_endが指すポインタを設定します。 str_endNULLである場合、それは無視されます.
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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strが空であるか、期待された形式を持っていない場合、変換は行われません、としますif(str_endNULLはありません)strの値がstr_endが指すオブジェクトに格納されてい.
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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目次

[編集] パラメータ

str -
解釈されるNULL終端バイト文字列へのポインタ
Original:
pointer to the null-terminated byte string to be interpreted
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str_end -
文字へのポインタへのポインタ..
Original:
pointer to a pointer to character.
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base -
解釈された整数値のベース
Original:
base of the interpreted integer value
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[編集] 値を返します

  • 成功した場合は、strの内容に対応する整数値が返されます.
    Original:
    If successful, an integer value corresponding to the contents of str is returned.
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  • 変換された値が対応する戻り値の型の範囲から外れた場合、範囲エラーが発生します(設定をerrnoERANGE)とLONG_MAXLONG_MINLLONG_MAXまたはLLONG_MIN返されます.
    Original:
    If the converted value falls out of range of corresponding return type, a range error occurs (setting errno to ERANGE) and LONG_MAX, LONG_MIN, LLONG_MAX or LLONG_MIN is returned.
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  • 変換を実行できなかった場合は、0が返されます。.
    Original:
    If no conversion can be performed, 0 is returned.
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[編集]

[編集] も参照してください

整数値をバイト文字列に変換します
Original:
converts a byte string to an integer value
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(機能) [edit]
符号なし整数値をバイト文字列に変換します
Original:
converts a byte string to an unsigned integer value
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(機能) [edit]
C++ documentation for strtol, strtoll