Namespace
Varianti

std::ratio_not_equal

Da cppreference.com.
< cpp‎ | numeric‎ | ratio

 
 
Numeri libreria
Comuni funzioni matematiche
Virgola mobile ambiente
I numeri complessi
Array numerici
Pseudo-casuale generazione
In fase di compilazione aritmetica razionale (C++11)
Generici operazioni numeriche
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Compilare aritmetica razionale del tempo
ratio(C++11)
Aritmetica
Original:
Arithmetic
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ratio_add(C++11)
ratio_subtract(C++11)
ratio_multiply(C++11)
ratio_divide(C++11)
Confronto
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_not_equal : std::integral_constant;
Se i rapporti di R1 e R2 non sono uguali, fornisce il membro costante value true uguali. In caso contrario, è value false.
Original:
If the ratios R1 and R2 are not equal, provides the member constant value equal true. Otherwise, value is false.
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Indice

Inherited from std::integral_constant

Member constants

value
[statico]
true se R1::num != R2::num || R1::den != R2::den , false altrimenti
Original:
true if R1::num != R2::num || R1::den != R2::den , false otherwise
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(pubblico membro statico costante)

Member functions

operator bool
converte l'oggetto in bool, restituisce value
Original:
converts the object to bool, returns value
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(membro pubblico funzione)

Member types

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

[modifica] Possibile implementazione

template< class R1, class R2 >
struct ratio_not_equal : std::integral_constant <
                              bool,
                              !std::ratio_equal<R1, R2>
                         > {};

[modifica] Esempio

#include <iostream>
#include <ratio>
 
int main()
{
    if(std::ratio_not_equal<std::ratio<2,3>, std::ratio<1,3>>::value) {
        std::cout << "2/3 != 1/3\n";
    } else {
        std::cout << "2/3 == 1/3\n";
    }
}

Output:

2/3 != 1/3