名前空間
変種
操作

std::boolalpha, std::noboolalpha

提供: cppreference.com
< cpp‎ | io‎ | manip

 
 
入力/出力ライブラリ
I / Oのマニピュレータ
CスタイルのI / O
バッファ
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(廃止予定)
ストリーム
Original:
Streams
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抽象化
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
ファイルI / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
文字列I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
アレイのI / O
Original:
Array I/O
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istrstream(廃止予定)
ostrstream(廃止予定)
strstream(廃止予定)
タイプ
Original:
Types
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streamoff
streamsize
fpos
エラーカテゴリインターフェース
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
入力/出力マニピュレータ
浮動小数点の書式
Original:
Floating-point formatting
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整数フォーマット
Original:
Integer formatting
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ブールの書式
Original:
Boolean formatting
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boolalpha
noboolalpha
フィールド幅と塗りつぶしコントロール
Original:
Field width and fill control
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その他の書式
Original:
Other formatting
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空白処理
Original:
Whitespace processing
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出力がフラッシュします
Original:
Output flushing
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ステータスフラグ操作
Original:
Status flags manipulation
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時間とお金のI / O
Original:
Time and money I/O
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get_money(C++11)
get_time(C++11)
put_money(C++11)
put_time(C++11)
 
Defined in header <ios>
std::ios_base& boolalpha( std::ios_base& str );
(1)
std::ios_base& noboolalpha( std::ios_base& str );
(2)
1)
boolalphaを呼び出したかのようにストリームstrstr.setf(std::ios_base::boolalpha)フラグをイネーブルにします
Original:
enables the boolalpha flag in the stream str as if by calling str.setf(std::ios_base::boolalpha)
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2)
boolalphaを呼び出したかのようにストリームstrstr.unsetf(std::ios_base::boolalpha)フラグを無効にします
Original:
disables the boolalpha flag in the stream str as if by calling str.unsetf(std::ios_base::boolalpha)
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std::boolalphaは、ので、それはそのようなタイプのout << std::boolalphaのいずれoutstd::basic_ostream用として、またはそのようなタイプの任意のin >> std::boolalphainためstd::basic_istreamとして式を使った式を使用してI / Oのマニピュレータと呼ばれることがあります。.
Original:
std::boolalpha is an I/O manipulator, so it may be called with an expression such as out << std::boolalpha for any out of type std::basic_ostream or with an expression such as in >> std::boolalpha for any in of type std::basic_istream.
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目次

[編集] パラメータ

str -
I / Oストリームを参照します
Original:
reference to I/O stream
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[編集] 値を返します

str(操作後のストリームへの参照)
Original:
str (reference to the stream after manipulation)
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[編集]

#include <sstream>
#include <locale>
#include <iostream>
int main()
{
    // boolalpha output
    std::cout << std::boolalpha 
              << "boolalpha true: " << true << '\n'
              << "boolalpha false: " << false << '\n';
    std::cout << std::noboolalpha 
              << "noboolalpha true: " << true << '\n'
              << "noboolalpha false: " << false << '\n';
    // booalpha parse
    bool b1, b2;
    std::istringstream is("true false");
    is >> std::boolalpha >> b1 >> b2;
    std::cout << '\"' << is.str() << "\" parsed as " << b1 << ' ' << b2 << '\n';
}

Output:

boolalpha true: true
boolalpha false: false
noboolalpha true: 1
noboolalpha false: 0
"true false" parsed as 1 0

[編集] も参照してください

テンプレート:cpp/locale/numpunct/dsc do truenameテンプレート:cpp/locale/numpunct/dsc do falsename
指定されたios_bas​​eのフラグをクリアします
Original:
clears the specified ios_base flags
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(機能) [edit]
指定されたios_bas​​eのフラグが設定されます
Original:
sets the specified ios_base flags
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(機能) [edit]