nan, nanf, nanl

 

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Fehlerbehandlung

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Numerics

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Localization Support

Thread-Unterstützung(C11)

Atomare Operationen(C11)

 

Numerics

Gemeinsame mathematischen Funktionen

Floating-Point-Umgebung

Complex number arithmetics

Generierung von Zufallszahlen

Typ-generic math

 

Gemeinsame mathematischen Funktionen

Funktionen Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Grundlegende Bedienung 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.
abs labs llabs imaxabs (C99) fabs div ldiv lldiv imaxdiv (C99) fmod	remainder (C99) remquo (C99) fma (C99) fmax (C99) fmin (C99) fdim (C99) nan nanf nanl (C99) (C99) (C99)
Exponentialfunktionen 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 (C99) expm1 (C99)	log log10 log1p (C99) log2 (C99)
Power-Funktionen 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 (C99)	hypot (C99) pow
Trigonometrische und hyperbolische Funktionen 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.
sin cos tan asin acos atan atan2	sinh cosh tanh asinh (C99) acosh (C99) atanh (C99)
Fehler-und Gamma-Funktionen 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 (C99) erfc (C99)	lgamma (C99) tgamma (C99)
Nächste ganze Zahl Fließkomma-Operationen 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 (C99) (C99) (C99)	trunc (C99) nearbyint (C99) rint lrint llrint (C99) (C99) (C99)
Floating-Point-Manipulation Funktionen 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 (C99) (C99) ilogb (C99) logb (C99)	frexp modf nextafter nexttoward (C99) (C99) copysign (C99)
Klassifizierung Original: Classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fpclassify (C99)
isfinite (C99)
isinf (C99)
isnan (C99)
isnormal (C99)
signbit (C99)
Makro Konstanten 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.
HUGE_VALF HUGE_VAL HUGE_VALL (C99) (C99)	FP_NORMAL FP_SUBNORMAL FP_ZERO FP_INFINITE FP_NAN (C99) (C99) (C99) (C99) (C99)

 

definiert in Header <math.h>
float       nanf(constchar* arg );
double      nan(constchar* arg );
longdouble nanl(constchar* arg );

Konvertiert die Implementierung definiert Zeichenkette arg in die entsprechende ruhigen NaN Wert. Der Anruf std::nan("string") entspricht dem Anruf std::strtod("NAN(string)", (char**)NULL); .

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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Parameter

arg

-

schmale Zeichenfolge, die den Inhalt einer NaN oder einer leeren Zeichenfolge Original: narrow character string identifying the contents of a NaN, or an empty string The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Rückgabewert

Der Wert NaN, die zur Identifizierung von String arg oder Null entspricht, wenn die implemntation nicht unterstützt ruhigen NaNs .

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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Siehe auch

isnan (C99)	prüft, ob die angegebene Zahl ist NaN Original: checks if the given number is NaN The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktion)
C++ documentation for nan