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std::ceil

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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>
float       ceil( float arg );
double      ceil( double arg );
long double ceil( long double arg );
double      ceil( Integral arg );
 (seit C++11)
Berechnet nächste ganze Zahl nicht weniger als arg .
Original:
Computes nearest integer not less than arg.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

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

Nächste ganze Zahl nicht weniger als arg
Original:
Nearest integer not less than arg
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[[Image:
Rückgabewert
Original:
{{{2}}}
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|200x200px]]
Argument

[Bearbeiten] Notes

Wenn das Argument unendlich (positiv oder negativ) oder Null (positiv oder negativ), ist der Rückgabewert das gleiche wie das Argument .
Original:
If the argument is infinity (positive or negative) or zero (positive or negative), the return value is the same as the argument.
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Die größte darstellbare Fließkommawerte sind genaue Zahlen in allen gängigen Fließkommaformate, so dass diese Funktion nie überläuft .
Original:
The largest representable floating-point values are exact integers in all standard floating-point formats, so this function never overflows.
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Diese Funktion kann jedoch nicht erforderlich, erhöhen FE_INEXACT Gleitkomma-Ausnahmen für nicht-ganzzahligen Argumenten .
Original:
This function may, but is not required to, raise FE_INEXACT floating-point exceptions for non-integer arguments.
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[Bearbeiten] Beispiel

#include <cmath>
#include <iostream>
 
int main()
{
    double a = 12.0;
    std::cout << std::fixed;
    std::cout << std::ceil(12.0) << '\n';
    std::cout << std::ceil(12.1) << '\n';
    std::cout << std::ceil(12.5) << '\n';
    std::cout << std::ceil(12.9) << '\n';
    std::cout << std::ceil(13.0) << '\n';}

Output: 

12.000000
13.000000
13.000000
13.000000
13.000000

[Bearbeiten] Siehe auch
nächste ganze Zahl nicht größer als der gegebene Wert
Original:
nearest integer not greater than the given value
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(Funktion) [edit]
(C++11)
nächste Ganzzahl nicht betragsmäßig größer als der gegebene Wert
Original:
nearest integer not greater in magnitude than the given value
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(Funktion) [edit]
(C++11)
(C++11)
(C++11)
nächste ganze Zahl, Rundung von Null weg in halbwegs Fällen
Original:
nearest integer, rounding away from zero in halfway cases
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(Funktion) [edit]
(C++11)
(C++11)
(C++11)
nächste ganze Zahl mit aktuellen Rundung Modus mit
Ausnahme, wenn das Ergebnis unterscheidet
Original:
nearest integer using current rounding mode with
exception if the result differs
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(Funktion) [edit]
(C++11)
nächste ganze Zahl mit aktuellen Rundung Modus
Original:
nearest integer using current rounding mode
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(Funktion) [edit]
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