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      std::scalbn, std::scalbln

      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
      Original:
      Generic numeric operations
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      iota (C++11)
      accumulate
      inner_product
      adjacent_difference
      partial_sum
       
      Fonctions mathématiques courantes
      {{{1}}}
      Original:
      {{{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       scalbn(float x, int exp );
      		 (depuis C++11)
      double      scalbn(double x, int exp );
      		 (depuis C++11)
      longdouble scalbn(longdouble x, int exp );
      		 (depuis C++11)
      double      scalbn( Integral x, int exp );
      		 (depuis C++11)
      float       scalbln(float x, long exp );
      		 (depuis C++11)
      double      scalbln(double x, long exp );
      		 (depuis C++11)
      longdouble scalbln(longdouble x, long exp );
      		 (depuis C++11)
      double      scalbln( Integral x, long exp );
      		 (depuis C++11)
      Multiplie une valeur à virgule flottante x par FLT_RADIX porté à exp pouvoir. Le système binaire est équivalent à ldexp()
      Original:
      Multiplies an floating point value x by FLT_RADIX raised to power exp. On binary system it is equivalent to ldexp()
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      [modifier]Paramètres

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

      x×FLT_RADIXexp rendements
      Original:
      returns x×FLT_RADIXexp
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      Si le résultat est trop grand pour le type sous-jacent, une erreur d'intervalle se produit et HUGE_VAL est retourné .
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      If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.
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      [modifier]Voir aussi

      se décompose en un certain nombre mantisse et d'une puissance de 2
      Original:
      decomposes a number into significand and a power of 2
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      (fonction)[edit]
      multiplie par un nombre 2 élevé à une puissance
      Original:
      multiplies a number by 2 raised to a power
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      (fonction)[edit]
      Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/numeric/math/scalbn&oldid=48874 »
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