名前空間
変種
操作

std::tgamma

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
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.
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.
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.
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       tgamma( float arg );
(C + + 11以来)
double      tgamma( double arg );
(C + + 11以来)
long double tgamma( long double arg );
(C + + 11以来)
double      tgamma( Integral arg );
(C + + 11以来)
ガンマ関数argを計算.
Original:
Computes the ガンマ関数 of arg.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

目次

[編集] パラメータ

arg -
浮動小数点値
Original:
floating point value
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[編集] 値を返します

argです
0
targ-1
e-t dt
のガンマ関数の値.
Original:
The value of the gamma function of arg, that is
0
targ-1
e-t dt
.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
argは自然数である場合、std::tgamma(arg)arg-1の階乗です.
Original:
If arg is a natural number, std::tgamma(arg) is the factorial of arg-1.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[編集] 例外

argが負の場合、ドメインエラーが発生することがありますとFE_INVALIDが発生する場合があります.
Original:
If arg is negative, domain error may occur and FE_INVALID may be raised.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
argがゼロの場合、極エラーが発生し、FE_DIVBYZEROが発生する場合があります.
Original:
If arg is zero, pole error may occur and FE_DIVBYZERO may be raised.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
argが大きすぎる場合、範囲エラーが発生することがありますとFE_OVERFLOWが発生する場合があります.
Original:
If arg is too large, range error may occur and FE_OVERFLOW may be raised.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
argが小さすぎる場合、範囲エラーが発生することがありますとFE_UNDERFLOWが発生する場合があります.
Original:
If arg is too small, range error may occur and FE_UNDERFLOW may be raised.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[編集] ノート

引数が十分に小さい整数であれば多くの実装では、正確な整数ドメイン階乗を計算.
Original:
Many implementations calculate the exact integer-domain factorial if the argument is a sufficiently small integer.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[編集]

#include <iostream>
#include <cmath>
double factorial(double arg)
{
    return std::tgamma(arg + 1);
}
int main()
{
    std::cout << "The factorial of 5 is " << factorial(5) << '\n'
              << "The factorial of 100 is " << factorial(100) << '\n';
}

Output:

The factorial of 5 is 120
The factorial of 100 is 9.33262e+157


[編集] も参照してください

(C++11)
ガンマ関数の自然対数
Original:
natural logarithm of the gamma function
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(機能) [edit]

[編集] 外部リンク

Weisstein, Eric W. "Gamma Function."MathWorldのから - WolframのWebリソース.
Original:
Weisstein, Eric W. "Gamma Function." From MathWorld--A Wolfram Web Resource.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.