Namespace
Varianti

std::ratio

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<

    std::intmax_t Num,
    std::intmax_t Denom = 1

> class ratio;
(dal C++11)

The class template std::ratio provides compile-time rational arithmetic support. Each instantiation of this template exactly represents any finite rational number as long as its numerator Num and denominator Denom are representable as compile-time constants of type std::intmax_t. In addition, Denom may not be zero and may not be equal to the most negative value. Both numerator and denominator are automatically reduced to the lowest terms.

Typedef convenienza diverse corrispondenti ai rapporti SI sono fornite dalla libreria standard:
Original:
Several convenience typedefs that correspond to the SI ratios are provided by the standard library:
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Defined in header <ratio>
Tipo
Original:
Type
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Definition
yocto
std::ratio<1, 1000000000000000000000000>, se std::intmax_t può rappresentare il denominatore
Original:
std::ratio<1, 1000000000000000000000000>, if std::intmax_t can represent the denominator
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zepto
std::ratio<1, 1000000000000000000000>, se std::intmax_t può rappresentare il denominatore
Original:
std::ratio<1, 1000000000000000000000>, if std::intmax_t can represent the denominator
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atto std::ratio<1, 1000000000000000000>
femto std::ratio<1, 1000000000000000>
pico std::ratio<1, 1000000000000>
nano std::ratio<1, 1000000000>
micro std::ratio<1, 1000000>
milli std::ratio<1, 1000>
centi std::ratio<1, 100>
deci std::ratio<1, 10>
deca std::ratio<10, 1>
hecto std::ratio<100, 1>
kilo std::ratio<1000, 1>
mega std::ratio<1000000, 1>
giga std::ratio<1000000000, 1>
tera std::ratio<1000000000000, 1>
peta std::ratio<1000000000000000, 1>
exa std::ratio<1000000000000000000, 1>
zetta
std::ratio<1000000000000000000000, 1>, se std::intmax_t può rappresentare il numeratore
Original:
std::ratio<1000000000000000000000, 1>, if std::intmax_t can represent the numerator
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yotta
std::ratio<1000000000000000000000000, 1>, se std::intmax_t può rappresentare il numeratore
Original:
std::ratio<1000000000000000000000000, 1>, if std::intmax_t can represent the numerator
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[modifica] Membri tipi

Membro tipo
Original:
Member type
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Definition
type std::ratio<num, den>

[modifica] Membri oggetti

constexpr intmax_t 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)
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(pubblico membro statico costante)
constexpr intmax_t 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)
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(pubblico membro statico costante)