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ldexp

提供: cppreference.com
< c‎ | numeric‎ | math

 
 
 
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(C99)
remquo(C99)
fma(C99)
fmax(C99)
fmin(C99)
fdim(C99)
nan
nanf
nanl
(C99)
(C99)
(C99)
指数関数
Original:
Exponential functions
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exp
exp2(C99)
expm1(C99)
log
log10
log1p(C99)
log2(C99)
電源機能
Original:
Power functions
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sqrt
cbrt(C99)
hypot(C99)
pow
三角関数や双曲線関数
Original:
Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C99)
acosh(C99)
atanh(C99)
エラーおよびガンマ関数
Original:
Error and gamma functions
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erf(C99)
erfc(C99)
lgamma(C99)
tgamma(C99)
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
(C99)
(C99)
(C99)
trunc(C99)
nearbyint(C99)
rint
lrint
llrint
(C99)
(C99)
(C99)
点操作関数に浮かぶ
Original:
Floating point manipulation functions
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ldexp
scalbn
scalbln
(C99)
(C99)
ilogb(C99)
logb(C99)
分類
Original:
Classification
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fpclassify(C99)
isfinite(C99)
isinf(C99)
isnan(C99)
isnormal(C99)
signbit(C99)
マクロ定数
Original:
Macro constants
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Defined in header <math.h>
float       ldexpf( float arg, int exp );
double      ldexp( double arg, int exp );
long double ldexpl( long double arg, int exp );
電源argに引き上げ2による浮動小数点値を乗算exp.
Original:
Multiplies an floating point value arg by 2 raised to power exp.
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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×2exp
Original:
Returns x×2exp
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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]
(C99)
(C99)
累乗しFLT_RADIXによって数を乗算します
Original:
multiplies a number by FLT_RADIX raised to a power
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(機能) [edit]