Espaços nominais
Variantes
Acções

std::ratio_add

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< cpp‎ | numeric‎ | ratio

 
 
Biblioteca numéricos
Funções matemáticas comuns
De ponto flutuante ambiente
Números complexos
Matrizes numéricas
Pseudo-aleatório de geração de números
Tempo de compilação aritmética racional (C++11)
Genéricos operações numéricas
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Compilar hora aritmética racional
ratio(C++11)
Aritmética
Original:
Arithmetic
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ratio_add(C++11)
ratio_subtract(C++11)
ratio_multiply(C++11)
ratio_divide(C++11)
Comparação
Original:
Comparison
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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)
 
Defined in header <ratio>
template< class R1, class R2 >
using ratio_add = /* unspecified */;
O modelo std::ratio_add apelido indica o resultado da adição de duas frações exatas racionais representados pelas instâncias std::ratio R1 e R2. O resultado de um exemplo onde std::ratio std::ratio<Num, Denom> Num == R1::num * R2::den + R2::num * R1::den e Denom == R1::den * R2::den.
Original:
The template alias std::ratio_add denotes the result of adding 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.
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[editar] Tipos de membro

Tipo de membro
Original:
Member type
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Definition
type std::ratio<num, den>

[editar] Constantes de membros

num
[estática]
constexpr valor do tipo std::intmax_t igual 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)
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(membro estático público constante)
den
[estática]
constexpr valor do tipo std::intmax_t igual abs(Denom) / gcd(Num, Denom)
Original:
constexpr value of type std::intmax_t equal to abs(Denom) / gcd(Num, Denom)
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(membro estático público constante)

[editar] Exemplo

#include <iostream>
#include <ratio>
 
int main()
{
    typedef std::ratio<2, 3> two_third;
    typedef std::ratio<1, 6> one_sixth;
 
    typedef std::ratio_add<two_third, one_sixth> sum;
    std::cout << "2/3 + 1/6 = " << sum::num << '/' << sum::den << '\n';
}

Output:

2/3 + 1/6 = 5/6