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std::copysign

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< cpp‎ | numeric‎ | math

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C++
 
ニューメリックスライブラリ
一般的な数学関数
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複素数
数値配列
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Generic numeric operations
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iota(C++11)
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一般的な数学関数
機能します
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Functions
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基本操作
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Basic operations
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Exponential functions
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Floating point manipulation functions
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copysign(C++11)
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signbit(C++11)
isgreater(C++11)
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FP_NORMAL
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(C++11)
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(C++11)
(C++11)
 
Defined in header <cmath>
float       copysign( float x, float y );
 (1) (C++11およびそれ以降)
double      copysign( double x, double y );
 (2) (C++11およびそれ以降)
long double copysign( long double x, long double y );
 (3) (C++11およびそれ以降)
Promoted    copysign( Arithmetic x, Arithmetic y );
 (4) (C++11およびそれ以降)
xとyの記号の大きさを持つ浮動小数点値を構成している.
Original:
Composes a floating point value with the magnitude of x and the sign of y.
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4)
いずれかの引数が整数型を持つ場合、それはdoubleにキャストされます。他の引数はlong doubleあれば、戻り値の型はlong double、それ以外の場合はdoubleです.
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If any argument has integral type, it is cast to double. If any other argument is long double, then the return type is long double, otherwise it is double.
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[編集] パラメータ

x, y -
浮動小数点値
Original:
floating point values
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[編集] 値を返します

xとyの記号の大きさを持つ浮動小数点値
Original:
floating point value with the magnitude of x and the sign of y
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[編集] 参照
浮動小数点値の絶対値（|x|）
Original:
absolute value of a floating point value (|x|)
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(関数) [edit]
(C++11)
チェック与えられた数値が負の場合
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checks if the given number is negative
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(関数) [edit]
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