std::copysign

 

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)

 

ニューメリックスライブラリ

一般的な数学関数

浮動小数点環境

複素数

数値配列

擬似乱数生成

コンパイル時有理数演算 (C++11)

汎用の数値演算 Original: Generic numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iota (C++11)

accumulate

inner_product

adjacent_difference

partial_sum

 

一般的な数学関数

機能します Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
基本操作 Original: Basic operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
abs(int) labs llabs imaxabs (C++11) abs(float) fabs div ldiv lldiv imaxdiv (C++11) fmod	remainder (C++11) remquo (C++11) fma (C++11) fmax (C++11) fmin (C++11) fdim (C++11) nan nanf nanl (C++11) (C++11) (C++11)
指数関数 Original: Exponential functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
exp exp2 (C++11) expm1 (C++11)	log log10 log1p (C++11) log2 (C++11)
電源機能 Original: Power functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sqrt cbrt (C++11)	hypot (C++11) pow
三角関数や双曲線関数 Original: Trigonometric and hyperbolic functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sin cos tan asin acos atan atan2	sinh cosh tanh asinh (C++11) acosh (C++11) atanh (C++11)

エラーおよびガンマ関数 Original: Error and gamma functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
erf (C++11) erfc (C++11)	lgamma (C++11) tgamma (C++11)
最も近い整数の浮動小数点演算 Original: Nearest integer floating point operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ceil floor round lround llround (C++11) (C++11) (C++11)	trunc (C++11) nearbyint (C++11) rint lrint llrint (C++11) (C++11) (C++11)
点操作関数に浮かぶ Original: Floating point manipulation functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ldexp scalbn scalbln (C++11) (C++11) ilogb (C++11) logb (C++11)	frexp modf nextafter nexttoward (C++11) (C++11) copysign (C++11)
分類/比較 Original: Classification/Comparison The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fpclassify (C++11) isfinite (C++11) isinf (C++11) isnan (C++11) isnormal (C++11) signbit (C++11)	isgreater (C++11) isgreaterequal (C++11) isless (C++11) islessequal (C++11) islessgreater (C++11) isunordered (C++11)
マクロ定数 Original: Macro constants The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
HUGE_VALF HUGE_VAL HUGE_VALL (C++11) (C++11) INFINITY (C++11) NAN (C++11) math_errhandling MATH_ERRNO MATH_ERREXCEPT (C++11)	FP_NORMAL FP_SUBNORMAL FP_ZERO FP_INFINITE FP_NAN (C++11) (C++11) (C++11) (C++11) (C++11)

 

Defined in header <cmath>
float       copysign( float x, float y );	(1)	(C + + 11以来)
double      copysign( double x, double y );	(2)	(C + + 11以来)
long double copysign( long double x, long double y );	(3)	(C + + 11以来)
Promoted    copysign( Arithmetic x, Arithmetic y );	(4)	(C + + 11以来)

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.

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

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.

Original:

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.

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

パラメータ

x, y

-

浮動小数点値 Original: floating point values 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

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

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

も参照してください

abs(float) fabs	浮動小数点値の絶対値（|x|） Original: absolute value of a floating point value (|x|) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (機能)
signbit (C++11)	チェック与えられた数値が負の場合 Original: checks if the given number is negative The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (機能)