# std::ratio_less

< cpp‎ | numeric‎ | ratio

C++
 Sprache Concepts Utilities-Bibliothek Strings Bibliothek Container-Bibliothek Algorithmen-Bibliothek Iteratoren Bibliothek Numerik-Bibliothek Input / Output-Bibliothek Lokalisierungen Bibliothek Reguläre Ausdrücke Bibliothek (C++11) Atomare Operationen Bibliothek (C++11) Thema Support-Bibliothek (C++11)

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
 partial_sum

Compile-Zeit rationale Arithmetik
 ratio (C++11)
Arithmetik
Original:
Arithmetic
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 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 template< class R1, class R2 > struct ratio_less : std::integral_constant;
Wenn das Verhältnis R1 kleiner ist als das Verhältnis R2 stellt die Elementkonstante `value` gleich true. Ansonsten ist `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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## Inherited from std::integral_constant

### Member constants

 value[statisch] true wenn R1::num * R2::den < R2::num * R1::den, or equivalent expression that avoids overflow , false anders Original: true if R1::num * R2::den < R2::num * R1::den, or equivalent expression that avoids overflow , false otherwise The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (public static Mitglied konstanten)

### Member functions

 operator bool wandelt das Objekt bool, gibt `value` Original: converts the object to bool, returns `value` The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion)

### Member types

 Type Original: Type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. Definition `value_type` `bool` `type` std::integral_constant

### [Bearbeiten]Beispiel

```#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`