std::operator<<,>>

 

C++

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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>
template <class CharT, class Traits, class Allocator> std::basic_ostream<CharT, Traits>&     operator<<(std::basic_ostream<CharT, Traits>& os,                const std::basic_string<CharT, Traits, Allocator>& str);	(1)
template <class CharT, class Traits, class Allocator> std::basic_istream<CharT, Traits>&     operator>>(std::basic_istream<CharT, Traits>& is,                std::basic_string<CharT, Traits, Allocator>& str);	(2)

1)

まず、std::basic_ostream::sentryオブジェクトをフラッシュネクタイを（）を構築する 'Dストリームエラーのために必要かどうかをチェックします。監視オブジェクトは、直ちにfalse、を返して終了します..場合

Original:

First, constructs a std::basic_ostream::sentry object, which flushes the tie()'d stream if necessary and checks for errors. If the sentry object returns false, exits immediately.

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その後、監視オブジェクトを返した場合true、num_put::put()のステージ3と同様にして、出力形式のパディングを決定.

Original:

Afterwards, if the sentry object returns true, determines the output format padding in the same manner as stage 3 of num_put::put().

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その後strまるでosを呼び出すことにより、出力ストリーム、os.rdbuf()->sputn(seq, n)に結果のシーケンス（n=std::max(os.width(), str.size())プラスパディングの内容）から、各文字を格納します

Original:

Then stores each character from the resulting sequence (the contents of str plus padding) to the output stream os as if by calling os.rdbuf()->sputn(seq, n), where n=std::max(os.width(), str.size())

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最後に、os.width(0)呼び出し.

Original:

Finally, calls os.width(0).

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2)

まず、std::basic_istream::sentryフラグがクリアされた場合を除き、必要に応じて抽出して捨てるならDストリーム 'すべての先行する空白文字をios_base::skipwsオブジェクトをフラッシュタイ（）を構築し、エラーがないかチェックします。監視オブジェクトは、直ちにfalse、を返して終了します..場合

Original:

First, constructs a std::basic_istream::sentry object, which flushes the tie()'d stream if necessary, extracts and discards all leading whitespace characters unless the ios_base::skipws flag was cleared, and checks for errors. If the sentry object returns false, exits immediately.

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その後、監視オブジェクトを返した場合true、strとstr.erase()クリアされます

Original:

Afterwards, if the sentry object returns true, clears str with str.erase()

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次のいずれかの条件がtrueになるまで続いて、isたかのようにstrstr.append(1, c)を付加それらから文字を読み取ります

Original:

Then reads characters from is and appends them to str as if by str.append(1, c), until one of the following conditions becomes true:

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• Nが、そうでなければNis.width()ある場合is.width() > 0がNですstr.max_size()文字が読み取られます

  Original:

  N characters are read, where N is is.width() if is.width() > 0, otherwise N is str.max_size()

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• ファイル終了条件は、ストリームisで発生します

  Original:

  the end-of-file condition occurs in the stream is

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• std::isspace(c,is.getloc())c内の次の文字is（この空白文字が入力ストリームに残っている）が真である.

  Original:

  std::isspace(c,is.getloc()) is true for the next character c in is (this whitespace character remains in the input stream).

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文字が次に抽出されていない場合はstd::ios::failbitisがスローされることがありますstd::ios_base::failure、上に設定されています.

Original:

If no characters are extracted then std::ios::failbit is set on is, which may throw std::ios_base::failure.

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最後に、os.width(0)呼び出し、std::basic_istream::sentryオブジェクトを破棄します.

Original:

Finally, calls os.width(0) and destroys the std::basic_istream::sentry object.

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例外

1)

例外が出力中に投げられたときにstd::ios_base::failureをスローすることがあります.

Original:

may throw std::ios_base::failure if an exception is thrown during output.

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2)

文字がstd::ios_base::failure（例えば、ストリームがファイルの末尾にある、または空白文字のみで構成されています）から抽出されていない場合、または例外が入力中に投げられたときにisをスローすることがあります.

Original:

may throw std::ios_base::failure if no characters are extracted from is (e.g the stream is at end of file, or consists of whitespace only), or if an exception is thrown during input.

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パラメータ

os	-	文字出力ストリーム Original: a character output stream The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is	-	文字入力ストリーム Original: a character input stream The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
str	-	文字列を挿入または抽出される Original: the string to be inserted or extracted 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

1) os

2) is

例

このコードを実行します

#include <iostream>
#include <string>
 
int main()
{
    std::string greeting = "Hello, whirled!"
    std::cout << greeting << '\n';
}

出力:

Hello, whirled!