名前空間
変種
操作

nan, nanf, nanl

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       nanf( const char* arg );
double      nan( const char* arg );
long double nanl( const char* arg );
対応する静かなNaN値に実装定義の文字列argに変換します。コー​​ルstd::nan("string")は、コールstd::strtod("NAN(string)", (char**)NULL);と同等です.
Original:
Converts the implementation-defined character string arg into the corresponding quiet NaN value. The call std::nan("string") is equivalent to the call std::strtod("NAN(string)", (char**)NULL);.
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[編集] パラメータ

arg -
狭い文字列では、NaN、または空の文字列の内容を識別する
Original:
narrow character string identifying the contents of a NaN, or an empty string
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[編集] 値を返します

implemntationは静かなNaNをサポートしていない場合に識別する文字列argまたはゼロに相当NaN値.
Original:
The NaN value that corresponds to the identifying string arg or zero if the implemntation does not support quiet NaNs.
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[編集] も参照してください

(C99)
与えられた番号かどうかをチェックするにはNaNになります
Original:
checks if the given number is NaN
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(関数) [edit]