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std::remquo

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remainder(C++11)
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Defined in header <cmath>
float       remquo( float x, float y, int *quo );
(1) (seit C++11)
double      remquo( double x, double y, int *quo );
(2) (seit C++11)
long double remquo( long double x, long double y, int *quo );
(3) (seit C++11)
Promoted    remquo( Arithmetic x, Arithmetic y, int *quo );
(4) (seit C++11)
speichern Berechnet den Rest der Gleitkomma Divisionsoperation x/y die remainder Funktion hat. Zusätzlich das Zeichen und wenigstens die drei der letzten Bits in x/y 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)
Wenn ein Argument hat integralen Typ, wird es double gegossen. Wenn ein anderes Argument long double ist, dann ist der Rückgabetyp long double ist, sonst ist es 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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Inhaltsverzeichnis

[Bearbeiten] Parameter

x, y -
Fließkommazahlen
Original:
floating point values
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quo -
Zeiger auf einen Integer.. Wert auf einige Bits x/y in
Original:
pointer to an integer value to store some bits of x/y in
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[Bearbeiten] Rückgabewert

Rest der Division Argumente
Original:
remainder of dividing arguments
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[Bearbeiten] Notes

Diese Funktion ist nützlich bei der Umsetzung periodische Funktionen mit der Periode exakt darstellbar als Floating-Point-Wert: bei der Berechnung sin(πx) für eine sehr große x, ruft std::sin können direkt in einem großen Fehler führen, aber wenn das Argument der Funktion wird zunächst mit std::remquo reduziert, die niederwertigen Bits des Quotienten verwendet werden, um die Zeichen zu bestimmen, und der Rest kann verwendet werden, um den Wert mit hoher Genauigkeit berechnet werden .
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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[Bearbeiten] Siehe auch

(C++11)
unterzeichnet Rest der Teilungsoperation
Original:
signed remainder of the division operation
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(Funktion) [edit]
Rest der Gleitkomma Teilungsoperation
Original:
remainder of the floating point division operation
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(Funktion) [edit]
der Quotient und Rest der ganzzahligen Division
Original:
the quotient and remainder of integer division
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(Funktion) [edit]