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log1p

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
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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       log1pf( float arg );
double      log1p( double arg );
long double log1pl( long double arg );
eの自然(底1+arg)対数を計算します。 log(1+arg)がゼロに近い場合、この関数はarg表現よりも正確です.
Original:
Computes the natural (base e) logarithm of 1+arg. This function is more precise than the expression log(1+arg) if arg is close to zero.
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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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[編集] 値を返します

ln(1+arg)

argが負の場合はドメイン·エラーが発生します。 NANはその場合に返されます.
Original:
Domain error occurs if arg is negative. NAN is returned in that case.
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arg0場合、範囲エラーが発生します。 -HUGE_VALはその場合に返されます.
Original:
Range error occurs if arg is 0. -HUGE_VAL is returned in that case.
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[編集] も参照してください

計算する自然(底 E)対数(底へ E)(ln(x)
Original:
computes natural (base e) logarithm (to base e) (ln(x))
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(機能) [edit]
計算するコモン(ベース 10)対数(log10(x)
Original:
computes common (base 10) logarithm (log10(x))
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(機能) [edit]