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

 

C++

言語

コンセプト

ユーティリティライブラリ

ストリングスライブラリ

コンテナライブラリ

アルゴリズムライブラリ

イテレータライブラリ

ニューメリックスライブラリ

入力/出力ライブラリ

ローカライゼーションライブラリ

正規表現ライブラリ (C++11)

アトミック操作ライブラリ (C++11)

スレッドのサポートライブラリ (C++11)

 

文字列ライブラリ

NULLで終端された文字列

バイト文字列

マルチバイト文字列

ワイド文字列

クラス

basic_string

char_traits

 

std::basic_string

メンバ関数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::npos

非メンバ関数 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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。NULLがpos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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パラメータ

str	-	変換する文字列 Original: the string to convert The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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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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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参照

stoi stol stoll (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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数)
stoul stoull (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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数)