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std::ratio_less

De cppreference.com
< cpp‎ | numeric‎ | ratio

 
 
Numéricos biblioteca
Funciones matemáticas comunes
Floating-point medio ambiente
Los números complejos
Matrices numéricas
Pseudo-aleatoria de generación de números
En tiempo de compilación aritmética racional (C++11)
Genéricos operaciones numéricas
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Compilar aritmética tiempo 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)
Comparación
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 >
struct ratio_less : std::integral_constant;
Si la relación R1 es menor que la relación de R2, proporciona el miembro constante value true igual. De lo contrario, es value false .
Original:
If the ratio R1 is less than the ratio R2, provides the member constant value equal true. Otherwise, value is false.
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Contenido

Inherited from std::integral_constant

Member constants

value
[estático]
true si R1::num * R2::den < R2::num * R1::den, or equivalent expression that avoids overflow , false lo contrario
Original:
true if R1::num * R2::den < R2::num * R1::den, or equivalent expression that avoids overflow , false otherwise
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(público miembro constante estática)

Member functions

operator bool
convierte el objeto a bool, devuelve value
Original:
converts the object to bool, returns value
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(miembro público función)

Member types

Tipo
Original:
Type
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Definition
value_type bool
type std::integral_constant<bool, value>

[editar] Ejemplo

#include <iostream>
#include <ratio>
 
int main()
{
    if (std::ratio_less<std::ratio<23,37>, std::ratio<57,90>>::value) {
        std::cout << "23/37 < 57/90\n";
    }
}

Output:

23/37 < 57/90