std::ratio_multiply – cppreference.com

std::ratio_multiply

Aus cppreference.com

<metanoindex/>

 
C++
 
Numerik-Bibliothek
Gemeinsame mathematischen Funktionen
Floating-Point-Umgebung
Komplexe Zahlen
Numerische Arrays
Pseudo-Zufallszahlen
Compile-time rationale Arithmetik (C++11)
Generische numerische Operationen
Original:
Generic numeric operations
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Compile-Zeit rationale Arithmetik
ratio(C++11)
Arithmetik
Original:
Arithmetic
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
ratio_add(C++11)
ratio_subtract(C++11)
ratio_multiply(C++11)
ratio_divide(C++11)
Vergleich
Original:
Comparison
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
ratio_equal(C++11)
ratio_not_equal(C++11)
ratio_less(C++11)
ratio_less_equal(C++11)
ratio_greater(C++11)
ratio_greater_equal(C++11)
 
<tbody> </tbody>
definiert in Header <ratio>
template< class R1, class R2 > using ratio_multiply = /* unspecified */;
Die Vorlage alias std::ratio_multiply bezeichnet das Ergebnis der Multiplikation zweier exakten rationalen Fraktionen von den std::ratio Fällen vertreten R1 und R2. Das Ergebnis eine Instanz std::ratio std::ratio<Num, Denom> wo Num == R1::num * R2::num und Denom == R1::den * R2::den .
Original:
The template alias std::ratio_multiply denotes the result of multiplying two exact rational fractions represented by the std::ratio instances R1 and R2. The result a std::ratio instance std::ratio<Num, Denom> where Num == R1::num * R2::num and Denom == R1::den * R2::den.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Mitglied Typen

Mitglied Typ
Original:
Member type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
 Definition
type std::ratio<num, den>

Mitglied Konstanten

Beispiel

#include <iostream>
#include <ratio>

int main()
{
    typedef std::ratio<2, 3> two_third;
    typedef std::ratio<1, 6> one_sixth;
    typedef std::ratio_multiply<two_third, one_sixth> r;
    std::cout << "2/3 * 1/6 = " << r::num << '/' << r::den << '\n';
}

Output: 

2/3 * 1/6 = 1/9