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Varianti

std::remquo

Da cppreference.com.
< cpp‎ | numeric‎ | math

 
 
Numeri libreria
Comuni funzioni matematiche
Virgola mobile ambiente
I numeri complessi
Array numerici
Pseudo-casuale generazione
In fase di compilazione aritmetica razionale (C++11)
Generici operazioni numeriche
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Comuni funzioni matematiche
Funzioni
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Functions
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Operazioni di base
Original:
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)
Funzioni esponenziali
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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)
Funzioni di risparmio energia
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Power functions
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sqrt
cbrt(C++11)
hypot(C++11)
pow
Funzioni trigonometriche e iperboliche
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Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C++11)
acosh(C++11)
atanh(C++11)
Errore e gamma funzioni
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Error and gamma functions
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erf(C++11)
erfc(C++11)
lgamma(C++11)
tgamma(C++11)
Più vicini operazioni di interi in virgola mobile
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Nearest integer floating point operations
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ceil
floor
round
lround
llround
(C++11)
(C++11)
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trunc(C++11)
nearbyint(C++11)
rint
lrint
llrint
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Floating funzioni di manipolazione di punti
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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)
Classificazione / confronto
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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)
Macro costanti
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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)
 
Defined in header <cmath>
float       remquo( float x, float y, int *quo );
(1) (dal C++11)
double      remquo( double x, double y, int *quo );
(2) (dal C++11)
long double remquo( long double x, long double y, int *quo );
(3) (dal C++11)
Promoted    remquo( Arithmetic x, Arithmetic y, int *quo );
(4) (dal C++11)
Calcola il resto del galleggiante x/y operazione di divisione punto come funzione remainder fa. Inoltre, il segno e almeno tre degli ultimi pezzi di x/y saranno memorizzati in quo.
Original:
Computes the remainder of the floating point division operation x/y as the remainder function does. Additionally, the sign and at least the three of the last bits of x/y will be stored in quo.
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4)
Se un qualsiasi argomento è di tipo integrale, il cast double. Se qualsiasi altro argomento è long double, quindi il tipo di ritorno è long double, altrimenti è double
Original:
If any argument has integral type, it is cast to double. If any other argument is long double, then the return type is long double, otherwise it is double
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Indice

[modifica] Parametri

x, y -
valori in virgola mobile
Original:
floating point values
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quo -
puntatore ad un intero.. valore da memorizzare alcuni bit di x/y trovi
Original:
pointer to an integer value to store some bits of x/y in
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[modifica] Valore di ritorno

restante argomenti divisorie
Original:
remainder of dividing arguments
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[modifica] Note

Questa funzione è utile in sede di attuazione funzioni periodiche con il periodo esattamente rappresentabile come un valore in virgola mobile: nel calcolo sin(πx) per un x molto grande, chiamando direttamente std::sin può causare un grande errore, ma se l'argomento della funzione viene prima ridotta con std::remquo, ordine basso bit del quoziente possono essere utilizzati per determinare il segno e il rimanente può essere utilizzata per calcolare il valore con alta precisione.
Original:
This function is useful when implementing periodic functions with the period exactly representable as a floating-point value: when calculating sin(πx) for a very large x, calling std::sin directly may result in a large error, but if the function argument is first reduced with std::remquo, the low-order bits of the quotient may be used to determine the sign and the remainder may be used to calculate the value with high precision.
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[modifica] Vedi anche

(C++11)
firmato resto della divisione
Original:
signed remainder of the division operation
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(funzione) [edit]
resto dell'operazione divisione floating point
Original:
remainder of the floating point division operation
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(funzione) [edit]
il quoziente e il resto della divisione intera
Original:
the quotient and remainder of integer division
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(funzione) [edit]