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std::ratio

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< cpp‎ | numeric‎ | ratio

 
 
Numerik-Bibliothek
Gemeinsame mathematischen Funktionen
Floating-Point-Umgebung
Komplexe Zahlen
Numerische Arrays
Pseudo-Zufallszahlen
Compile-time rationale Arithmetik (C++11)
Generische numerische Operationen
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Compile-Zeit rationale Arithmetik
ratio(C++11)
Arithmetik
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Arithmetic
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ratio_add(C++11)
ratio_subtract(C++11)
ratio_multiply(C++11)
ratio_divide(C++11)
Vergleich
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;
(seit 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.

Mehrere Convenience typedefs, die auf die SI-Verhältnisse entsprechen, werden von der Standard-Bibliothek zur Verfügung:
Original:
Several convenience typedefs that correspond to the SI ratios are provided by the standard library:
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Defined in header <ratio>
Type
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Type
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Definition
yocto
std::ratio<1, 1000000000000000000000000>, wenn std::intmax_t können den Nenner darstellen
Original:
std::ratio<1, 1000000000000000000000000>, if std::intmax_t can represent the denominator
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zepto
std::ratio<1, 1000000000000000000000>, wenn std::intmax_t können den Nenner darstellen
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>, wenn std::intmax_t können den Zähler darstellen
Original:
std::ratio<1000000000000000000000, 1>, if std::intmax_t can represent the numerator
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yotta
std::ratio<1000000000000000000000000, 1>, wenn std::intmax_t können den Zähler darstellen
Original:
std::ratio<1000000000000000000000000, 1>, if std::intmax_t can represent the numerator
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[Bearbeiten] Mitglied Typen

Mitglied Typ
Original:
Member type
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Definition
type std::ratio<num, den>

[Bearbeiten] Mitglied widerspricht

constexpr intmax_t num
[statisch]
constexpr Wert vom Typ std::intmax_t gleich 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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(public static Mitglied konstanten)
constexpr intmax_t den
[statisch]
constexpr Wert vom Typ std::intmax_t gleich abs(Denom) / gcd(Num, Denom)
Original:
constexpr value of type std::intmax_t equal to abs(Denom) / gcd(Num, Denom)
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(public static Mitglied konstanten)