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      std::tgamma

      De cppreference.com
      < cpp‎ | numeric‎ | math

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      C++
       
      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)
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      Generic numeric operations
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      {{{2}}}
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      Exponential functions
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      Erreur fonctions et gamma
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      Error and gamma functions
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      erf (C++11)
      erfc (C++11)
      lgamma (C++11)
      tgamma (C++11)
      Entier le plus proche opérations en virgule flottante
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      Nearest integer floating point operations
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      Flottant fonctions de manipulation de points
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      </div>
       
      </div>
      Déclaré dans l'en-tête <cmath>
      float       tgamma(float arg );
      		 (depuis C++11)
      double      tgamma(double arg );
      		 (depuis C++11)
      longdouble tgamma(longdouble arg );
      		 (depuis C++11)
      double      tgamma( Integral arg );
      		 (depuis C++11)
      Calcule la fonction gamma de arg .
      Original:
      Computes the fonction gamma of arg.
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      Sommaire

      [modifier]Paramètres

      arg -
      valeur du point flottant
      Original:
      floating point value
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      [modifier]Retourne la valeur

      La valeur de la fonction gamma de arg, c'est ∫∞
      0      targ-1
      e-t dt       .
      Original:
      The value of the gamma function of arg, that is ∫∞
      0      targ-1
      e-t dt      .
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      Si arg est un nombre naturel, std::tgamma(arg) est la factorielle de arg-1 .
      Original:
      If arg is a natural number, std::tgamma(arg) is the factorial of arg-1.
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      [modifier]Exceptions

      Si arg est négatif, une erreur de domaine peut se produire et FE_INVALID peut être soulevée .
      Original:
      If arg is negative, domain error may occur and FE_INVALID may be raised.
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      Si arg est égal à zéro, erreur de pôle peut se produire et FE_DIVBYZERO peut être soulevée .
      Original:
      If arg is zero, pole error may occur and FE_DIVBYZERO may be raised.
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      Si arg est trop grande, l'erreur peut se produire plage et FE_OVERFLOW peut être soulevée .
      Original:
      If arg is too large, range error may occur and FE_OVERFLOW may be raised.
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      Si arg est trop petite erreur peut se produire plage et FE_UNDERFLOW peut être soulevée .
      Original:
      If arg is too small, range error may occur and FE_UNDERFLOW may be raised.
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      [modifier]Notes

      De nombreuses implémentations de calculer exactement le nombre entier le domaine factorielle si l'argument est un entier suffisamment petit .
      Original:
      Many implementations calculate the exact integer-domain factorial if the argument is a sufficiently small integer.
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      [modifier]Exemple

      #include <iostream>#include <cmath>double factorial(double arg){return std::tgamma(arg +1);}int main(){std::cout<<"The factorial of 5 is "<< factorial(5)<<'\n'<<"The factorial of 100 is "<< factorial(100)<<'\n';}

      Résultat : 

      The factorial of 5 is 120 The factorial of 100 is 9.33262e+157


      [modifier]Voir aussi

      (C++11)
      logarithme naturel de la fonction gamma
      Original:
      natural logarithm of the gamma function
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      (fonction)[edit]

      [modifier]Liens externes

      Weisstein, Eric W. "Gamma Function." De MathWorld - Une ressource Web Wolfram .
      Original:
      Weisstein, Eric W. "Gamma Function." From MathWorld--A Wolfram Web Resource.
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      Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/numeric/math/tgamma&oldid=48881 »
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