名前空間
変種
操作

std::stof, std::stod, std::stold

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< cpp‎ | string‎ | basic string

 
 
 
std::basic_string
メンバ関数
Original:
Member functions
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basic_string::basic_string
basic_string::operator=
basic_string::assign
basic_string::get_allocator
要素アクセスの循環参照を解除するために使用されている
Original:
Element access
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basic_string::at
basic_string::operator[]
basic_string::front(C++11)
basic_string::back(C++11)
basic_string::data
basic_string::c_str
イテレータ
Original:
Iterators
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basic_string::begin
basic_string::cbegin

(C++11)
basic_string::end
basic_string::cend

(C++11)
basic_string::rbegin
basic_string::crbegin

(C++11)
basic_string::rend
basic_string::crend

(C++11)
容量
Original:
Capacity
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basic_string::empty
basic_string::size
basic_string::length
basic_string::max_size
basic_string::reserve
basic_string::capacity
basic_string::shrink_to_fit(C++11)
操作
Original:
Operations
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basic_string::clear
basic_string::insert
basic_string::erase
basic_string::push_back
basic_string::pop_back(C++11)
basic_string::append
basic_string::operator+=
basic_string::compare
basic_string::replace
basic_string::substr
basic_string::copy
basic_string::resize
basic_string::swap
検索
Original:
Search
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basic_string::find
basic_string::rfind
basic_string::find_first_of
basic_string::find_first_not_of
basic_string::find_last_of
basic_string::find_last_not_of
定数
Original:
Constants
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basic_string::npos
非メンバ関数
Original:
Non-member functions
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operator+
operator==
operator!=
operator<
operator>
operator<=
operator>=
swap(std::basic_string)
operator<<
operator>>
getline
stoi
stol
stoll
(C++11)
(C++11)
(C++11)
stoul
stoull
(C++11)
(C++11)
stof
stod
stold
(C++11)
(C++11)
(C++11)
to_string(C++11)
to_wstring(C++11)
ヘルパークラス
Original:
Helper classes
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hash<std::string>
hash<std::wstring>
hash<std::u32string>
hash<std::u16string>
(C++11)
 
Defined in header <string>
float       stof( const std::string& str, size_t *pos = 0 );
(1) (C++11およびそれ以降)
double      stod( const std::string& str, size_t *pos = 0 );
(2) (C++11およびそれ以降)
long double stold( const std::string& str, size_t *pos = 0 );
(3) (C++11およびそれ以降)
文字列strの浮動小数点値を解釈.
Original:
Interprets a floating point value in a string str.
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最初の非空白文字が検出されるまで、この関数は(std::isspace()によって決定されるように)任意の空白文字を破棄します。それは有効な浮動小数点表現を形成するために、できるだけ多くの文字を取り、浮動小数点値に変換します。有効な浮動小数点値は、次のいずれかを指定できます
Original:
Function discards any whitespace characters (as determined by std::isspace()) until first non-whitespace character is found. Then it takes as many characters as possible to form a valid floating point representation and converts them to floating point value. The valid floating point value can be one of the following:
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  • 進浮動小数点式。それは次の部分から構成されます
    Original:
    decimal floating point expression. It 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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  • オプションで小数点文字(定義仮)を含む小数桁数の空ではないシーケンス
    Original:
    nonempty sequence of decimal digits optionally containing a decimal point character (defines significand)
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  • (オプション)eまたはEマイナスオプションまたはプラス記号と小数点以下桁数の空でないシーケンス(定義指数)と続いた
    Original:
    (オプション) e or E followed with optional minus or plus sign and nonempty sequence of decimal digits (defines exponent)
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  • 進浮動小数点式。それは次の部分から構成されます
    Original:
    binary floating point expression. It 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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  • 0x or 0X
  • オプションで小数点文字(定義仮)を含む進数字の空ではないシーケンス
    Original:
    nonempty sequence of hexadecimal digits optionally containing a decimal point character (defines significand)
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  • (オプション)pまたはPマイナスオプションまたはプラス記号と16進数の空でないシーケンス(定義指数)と続いた
    Original:
    (オプション) p or P followed with optional minus or plus sign and nonempty sequence of hexadecimal digits (defines exponent)
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  • 無限式。それは次の部分から構成されます
    Original:
    infinity expression. It 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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  • INFまたはINFINITY大文字小文字の区別を無視して
    Original:
    INF or INFINITY ignoring case
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  • 非数値式。それは次の部分から構成されます
    Original:
    not-a-number expression. It 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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  • NANまたはNAN(' char_sequence)NAN部分の大文字小文字の区別を無視。 ' char_sequence英数字のみを含めることができます。結果はクワイエットNaN浮動小数点値です.
    Original:
    NAN or NAN(char_sequence) ignoring case of the NAN part. char_sequence can only contain alphanumeric characters. The result is a quiet NaN floating point value.
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ない最初の文字のインデックスにposに格納されています。NULLposとして渡された場合、それは無視される.
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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目次

[編集] パラメータ

str -
変換する文字列
Original:
the string to convert
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pos -
ない最初の文字のインデックスを格納する整数のアドレス
Original:
address of integer to store the index of the first unconverted character
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[編集] 値を返します

文字列は、指定された浮動小数点型に変換.
Original:
The string converted to the specified floating point type.
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[編集] 例外

std::invalid_argument変換が行われなかった場合
Original:
std::invalid_argument if no conversion could be performed
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std::out_of_range変換された値が結果の型の範囲外に落ちるならば.
Original:
std::out_of_range if the converted value would fall out of the range of the result type.
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[編集] 参照

(C++11)
(C++11)
(C++11)
符号付き整数に文字列を変換します
Original:
converts a string to an signed integer
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(関数) [edit]
(C++11)
(C++11)
符号なし整数に文字列を変換します
Original:
converts a string to an unsigned integer
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(関数) [edit]