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std::setbase

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< 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
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
文字列I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
アレイのI / O
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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
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Types
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streamoff
streamsize
fpos
エラーカテゴリインターフェース
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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
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Floating-point formatting
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整数フォーマット
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Integer formatting
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ブールの書式
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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
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Field width and fill control
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その他の書式
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Other formatting
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空白処理
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Whitespace processing
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出力がフラッシュします
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Output flushing
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ステータスフラグ操作
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Status flags manipulation
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時間とお金のI / O
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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 <iomanip>
/*unspecified*/ setbase( int base );
式で使用される場合out << setbase(base)またはin >> setbase(base)、ストリームのbasefieldフラグを変更outまたはinbaseの値に応じて:値16セットbasefieldstd::ios_base::hex、値に8セットstd::ios_base::oct、値10セットstd::ios_base::dec.
Original:
When used in an expression out << setbase(base) or in >> setbase(base), changes the basefield flag of the stream out or in, depending on the value of base: the value 16 sets basefield to std::ios_base::hex, the value 8 sets std::ios_base::oct, the value 10 sets std::ios_base::dec.
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8以外baseの値、0〜10、または16リセットbasefield、10進数出力とprefix-依存の入力に対応しています.
Original:
Values of base other than 8, 10, or 16 reset basefield to zero, which corresponds to decimal output and prefix-dependent input.
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目次

[編集] パラメータ

base -
basefieldの新しい値
Original:
new value for basefield
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[編集] 値を返します

不特定の型のオブジェクトを返すような場合strタイプの出力ストリームの名前ですstd::basic_ostream<CharT, Traits>またはstd::basic_istream<CharT, Traits>、式str << setbase(base)またはstr >> setbase(base)次のコードが実行されたかのように動作します
Original:
Returns an object of unspecified type such that if str is the name of an output stream of type std::basic_ostream<CharT, Traits> or std::basic_istream<CharT, Traits>, then the expression str << setbase(base) or str >> setbase(base) behaves as if the following code was executed:
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str.setf(base ==  8 ? std::ios_base::oct :
            base == 10 ? std::ios_base::dec :
                base == 16 ? std::ios_base::hex :
                     std::ios_base::fmtflags(0),
         std::ios_base::basefield);

[編集]

#include <iostream>
#include <sstream>
#include <iomanip>
int main()
{
    std::cout << "Parsing string \"10 0x10 010\"\n";
 
    int n1, n2, n3;
    std::istringstream s("10 0x10 010");
    s >> std::setbase(16) >> n1 >> n2 >> n3;
    std::cout << "hexadecimal parse: " << n1 << ' ' << n2 << ' ' << n3 << '\n';
 
    s.clear();
    s.seekg(0);
    s >> std::setbase(0) >> n1 >> n2 >> n3;
    std::cout << "prefix-dependent parse: " << n1 << ' ' << n2 << ' ' << n3 << '\n';
 
    std::cout << "hex output: " << std::setbase(16)
              << std::showbase << n1 << ' ' << n2 << ' ' << n3 << '\n';
}

Output:

Parsing string "10 0x10 010"
hexadecimal parse: 16 16 16
prefix-dependent parse: 10 16 8
hex output: 0xa 0x10 0x8

[編集] も参照してください

整数I / O用に使用されるベースを変更
Original:
changes the base used for integer I/O
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(関数) [edit]
プレフィックスは基数を示すために使用されているかどうかを制御します
Original:
controls whether prefix is used to indicate numeric base
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(関数) [edit]