# std::ratio_less

< cpp‎ | numeric‎ | ratio

Bibliothèque Numerics
Fonctions mathématiques courantes
Virgule flottante environnement
Nombres complexes
Tableaux numériques
La génération de nombres pseudo-aléatoires
Moment de la compilation arithmétique rationnelle (C++11)
Génériques des opérations numériques
Original:
Generic numeric operations
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 iota (C++11)
 accumulate
 inner_product
 partial_sum

Compiler arithmétique rationnelle du temps
 ratio (C++11)
Arithmétique
Original:
Arithmetic
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 ratio_subtract (C++11)
 ratio_multiply (C++11)
 ratio_divide (C++11)
Comparaison
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)

 Déclaré dans l'en-tête template< class R1, class R2 > struct ratio_less : std::integral_constant;
Si le rapport R1 est inférieur à la proportion R2, fournit l'élément constant `value` true égale. Sinon, `value` est 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[statiqueOriginal:staticThe text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.] true si R1::num * R2::den < R2::num * R1::den, or equivalent expression that avoids overflow , false autrement 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. (constante membre statique publique)

### Member functions

 operator bool convertit l'objet en bool, retourne `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. (fonction membre publique)

### Member types

 Type d' 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

### [modifier]Exemple

```#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";
}
}```

Résultat :

`23/37 < 57/90`