名前空間
変種
操作

std::scalbn, std::scalbln

提供: cppreference.com
< cpp‎ | numeric‎ | math

 
 
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
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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
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基本操作
Original:
Basic operations
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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
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exp
exp2(C++11)
expm1(C++11)
log
log10
log1p(C++11)
log2(C++11)
電源機能
Original:
Power functions
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sqrt
cbrt(C++11)
hypot(C++11)
pow
三角関数や双曲線関数
Original:
Trigonometric and hyperbolic functions
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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
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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
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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
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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
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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
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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       scalbn( float x, int exp );
(C + + 11以来)
double      scalbn( double x, int exp );
(C + + 11以来)
long double scalbn( long double x, int exp );
(C + + 11以来)
double      scalbn( Integral x, int exp );
(C + + 11以来)
float       scalbln( float x, long exp );
(C + + 11以来)
double      scalbln( double x, long exp );
(C + + 11以来)
long double scalbln( long double x, long exp );
(C + + 11以来)
double      scalbln( Integral x, long exp );
(C + + 11以来)
電源xに引き上げFLT_RADIXによる浮動小数点値expを乗算します。バイナリのシステムではldexp()に相当します
Original:
Multiplies an floating point value x by FLT_RADIX raised to power exp. On binary system it is equivalent to ldexp()
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[編集] パラメータ

arg -
浮動小数点値
Original:
floating point value
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exp -
整数値
Original:
integer value
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[編集] 値を返します

戻りx×FLT_RADIXexp
Original:
returns x×FLT_RADIXexp
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結果は、基になる型には大きすぎる場合、範囲エラーが発生し、HUGE_VALが返されます.
Original:
If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.
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[編集] も参照してください

数値は仮数と2の力に分解する
Original:
decomposes a number into significand and a power of 2
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(機能) [edit]
累乗し2によって数を乗算します
Original:
multiplies a number by 2 raised to a power
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(機能) [edit]