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操作

atoi, atol, atoll

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< 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
Original:
Character manipulation
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数値形式への変換
Original:
Conversions to numeric formats
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atof
atoi
atol
atoll
strtol
strtoll
文字列操作
Original:
String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
文字列の検査
Original:
String examination
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メモリ操作
Original:
Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
その他
Original:
Miscellaneous
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strerror
 
Defined in header <stdlib.h>
int       atoi( const char *str );
long      atol( const char *str )
long long atoll( const char *str );
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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最初の非空白文字が検出されるまで、関数は、任意の空白文字を破棄します。それは有効な整数の表現を形成するために、できるだけ多くの文字を取り、整数値に変換します。有効な整数値は、次の部分から構成されます
Original:
Function discards any whitespace characters until first non-whitespace character is found. Then it takes as many characters as possible to form a valid integer number representation and converts them to integer value. The valid integer value consists of the following parts:
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  • (オプション)プラス記号またはマイナス記号
    Original:
    (オプション) plus or minus sign
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  • 数字
    Original:
    numeric digits
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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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[編集] 値を返します

成功した場合にstrの内容に対応する整数値。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、戻り値は未定義です。変換を実行できなかった場合は、0が返されます。.
Original:
Integer value corresponding to the contents of str on success. If the converted value falls out of range of corresponding return type, the return value is undefined. 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 atoi, atol, atoll