std::ratio_subtract
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| Déclaré dans l'en-tête <ratio>
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| template< class R1, class R2 > using ratio_subtract = /* unspecified */; |
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L'alias de modèle
std::ratio_subtract indique le résultat de la soustraction de deux fractions rationnelles exactes représentés par les instances std::ratio R1 et R2. Le résultat d'une std::ratio exemple std::ratio<Num, Denom> où Num == R1::num * R2::den - R2::num * R1::den et Denom == R1::den * R2::den .Original:
The template alias
std::ratio_subtract denotes the result of subtracting 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::den - R2::num * R1::den 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.
You can help to correct and verify the translation. Click here for instructions.
[modifier] Types de membres
| Type du membre | Définition |
type
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std::ratio<num, den> |
[modifier] Constantes membres
| num [ statique ]Original: static The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
constexpr valeur de type std::intmax_t égale à sign(Num) * sign(Denom) * abs(Num) / gcd(Num, Denom) Original: The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (constante membre statique publique) |
| den [ statique ]Original: static The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
constexpr valeur de type std::intmax_t égale à abs(Denom) / gcd(Num, Denom) Original: The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (constante membre statique publique) |
[modifier] Exemple
#include <iostream> #include <ratio> int main() { typedef std::ratio<2, 3> two_third; typedef std::ratio<1, 6> one_sixth; typedef std::ratio_subtract<two_third, one_sixth> diff; std::cout << "2/3 - 1/6 = " << diff::num << '/' << diff::den << '\n'; }
Résultat :
2/3 - 1/6 = 1/2
