std::ratio_multiply

 

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In fase di compilazione aritmetica razionale(C++11)

Generici operazioni numeriche 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)

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Compilare aritmetica razionale del tempo

ratio (C++11)

Aritmetica 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)

Confronto 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)

 

Elemento definito nell'header <ratio>
template<class R1, class R2 > using ratio_multiply =/* unspecified */;

Il modello std::ratio_multiply alias indica il risultato della moltiplicazione due frazioni esatte razionali rappresentati dai std::ratio istanze R1 e R2. Il risultato un'istanza std::ratiostd::ratio<Num, Denom> dove Num == R1::num* R2::num e 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.

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Membri tipi

Membro tipo 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>

Membri costanti

num [statico]	Valore constexpr di tipo std::intmax_t pari a sign(Num) * sign(Denom) * abs(Num) / gcd(Num, Denom) Original: constexpr value of type std::intmax_t equal to sign(Num) * sign(Denom) * abs(Num) / gcd(Num, Denom) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (pubblico membro statico costante)
den [statico]	Valore constexpr di tipo std::intmax_t pari a abs(Denom) / gcd(Num, Denom) Original: constexpr value of type std::intmax_t equal to abs(Denom) / gcd(Num, Denom) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (pubblico membro statico costante)

Esempio

#include <iostream>#include <ratio>   int main(){typedefstd::ratio<2, 3> two_third;typedefstd::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