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      std::log1p

      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)
      Génériques des opérations numériques
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      Generic numeric operations
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      iota (C++11)
      accumulate
      inner_product
      adjacent_difference
      partial_sum
       
      Fonctions mathématiques courantes
      {{{1}}}
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      {{{2}}}
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      Fonctions
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      Functions
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      Opérations de base
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      Basic operations
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      remainder (C++11)
      remquo (C++11)
      fma (C++11)
      fmax (C++11)
      fmin (C++11)
      fdim (C++11)
      nan
      nanf
      nanl      		 (C++11)
      (C++11)
      (C++11)
      Les fonctions exponentielles
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      Exponential functions
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      exp
      exp2 (C++11)
      expm1 (C++11)
      log
      log10
      log1p (C++11)
      log2 (C++11)
      Les fonctions de puissance
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      Power functions
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      sqrt
      cbrt (C++11)
      hypot (C++11)
      pow
      Les fonctions trigonométriques et hyperboliques
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      Trigonometric and hyperbolic functions
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      sinh
      cosh
      tanh
      asinh (C++11)
      acosh (C++11)
      atanh (C++11)
      {{{1}}}
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      {{{2}}}
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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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      ceil
      floor
      round
      lround
      llround      		 (C++11)
      (C++11)
      (C++11)
      trunc (C++11)
      nearbyint (C++11)
      rint
      lrint
      llrint      		 (C++11)
      (C++11)
      (C++11)
      Flottant fonctions de manipulation de points
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      Floating point manipulation functions
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      ldexp
      scalbn
      scalbln      		 (C++11)
      (C++11)
      ilogb (C++11)
      logb (C++11)
      frexp
      modf
      nextafter
      nexttoward      		 (C++11)
      (C++11)
      copysign (C++11)
      Classification / Comparaison
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      Classification/Comparison
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      fpclassify (C++11)
      isfinite (C++11)
      isinf (C++11)
      isnan (C++11)
      isnormal (C++11)
      signbit (C++11)
      isgreater (C++11)
      isgreaterequal (C++11)
      isless (C++11)
      islessequal (C++11)
      islessgreater (C++11)
      isunordered (C++11)
      Macro constantes
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      Macro constants
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      FP_NORMAL
      FP_SUBNORMAL
      FP_ZERO
      FP_INFINITE
      FP_NAN      		 (C++11)
      (C++11)
      (C++11)
      (C++11)
      (C++11)
      </div>
       
      </div>
      Déclaré dans l'en-tête <cmath>
      float       log1p(float arg );
      		 (depuis C++11)
      double      log1p(double arg );
      		 (depuis C++11)
      longdouble log1p(longdouble arg );
      		 (depuis C++11)
      double      log1p( Integral arg );
      		 (depuis C++11)
      Calcule le naturel (base e) logarithme de 1+arg. Cette fonction est plus précise que l'expression std::log(1+arg) si arg est proche de zéro .
      Original:
      Computes the natural (base e) logarithm of 1+arg. This function is more precise than the expression std::log(1+arg) if arg is close to zero.
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      [modifier]Paramètres

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

      ln(1+arg)

      Erreur de domaine se produit si arg est négatif. NAN est retourné dans ce cas .
      Original:
      Domain error occurs if arg is negative. NAN is returned in that case.
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      Erreur d'intervalle se produit si arg est ​0​. -HUGE_VAL est retourné dans ce cas .
      Original:
      Range error occurs if arg is ​0​. -HUGE_VAL is returned in that case.
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      [modifier]Voir aussi

      calcule naturel (base e) logarithme (de base e) (ln(x))
      Original:
      computes natural (base e) logarithm (to base e) (ln(x))
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      (fonction)[edit]
      (C++11)
      retours e à la puissance donnée, moins un (ex-1)
      Original:
      returns e raised to the given power, minus one (ex-1)
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      (fonction)[edit]
      calcule commune (base 10) Logarithme (log10(x))
      Original:
      computes common (base 10) logarithm (log10(x))
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      (fonction)[edit]
      (C++11)
      logarithme en base 2 d'un nombre donné
      Original:
      base 2 logarithm of the given number
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      (fonction)[edit]
      Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/numeric/math/log1p&oldid=48861 »
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