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std::isunordered

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C++
 
Numerik-Bibliothek
Gemeinsame mathematischen Funktionen
Floating-Point-Umgebung
Komplexe Zahlen
Numerische Arrays
Pseudo-Zufallszahlen
Compile-time rationale Arithmetik (C++11)
Generische numerische Operationen
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Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Gemeinsame mathematischen Funktionen
Funktionen
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Functions
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Grundlegende Bedienung
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Basic operations
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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)
Exponentialfunktionen
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Exponential functions
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exp
exp2(C++11)
expm1(C++11)
log
log10
log1p(C++11)
log2(C++11)
Power-Funktionen
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Power functions
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sqrt
cbrt(C++11)
hypot(C++11)
pow
Trigonometrische und hyperbolische Funktionen
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Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C++11)
acosh(C++11)
atanh(C++11)
Fehler-und Gamma-Funktionen
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Error and gamma functions
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erf(C++11)
erfc(C++11)
lgamma(C++11)
tgamma(C++11)
Nächste ganze Zahl Fließkomma-Operationen
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Nearest integer floating point operations
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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)
Floating-Point-Manipulation Funktionen
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Floating point manipulation functions
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ldexp
scalbn
scalbln		(C++11)
(C++11)
ilogb(C++11)
logb(C++11)
frexp
modf
nextafter
nexttoward		(C++11)
(C++11)
copysign(C++11)
Klassifizierung / Vergleich
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Classification/Comparison
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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)
Makro Konstanten
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Macro constants
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FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN		(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
 
definiert in Header <cmath>
bool isunordered( float x, float y );
 (seit C++11)
bool isunordered( double x, double y );
 (seit C++11)
bool isunordered( long double x, long double y );
 (seit C++11)
Bestimmt, ob die Fließkommazahlen x und y sind ungeordnet, das heißt, eine oder beide NaN sind und somit nicht sinnvoll miteinander verglichen werden .
Original:
Determines if the floating point numbers x and y are unordered, that is, one or both are NaN and thus cannot be meaningfully compared with each other.
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[Bearbeiten] Parameter

x -
Floating-Point-Wert
Original:
floating point value
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y -
Floating-Point-Wert
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floating point value
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[Bearbeiten] Rückgabewert

true wenn entweder x oder y NaN ist, false anders
Original:
true if either x or y is NaN, false otherwise
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[Bearbeiten] Siehe auch

(C++11)
kategorisiert den angegebenen Gleitkommawert
Original:
categorizes the given floating point value
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(Funktion) [edit]
(C++11)
prüft, ob die angegebene Zahl ist NaN
Original:
checks if the given number is NaN
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(Funktion) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/numeric/math/isunordered&oldid=29591“