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      std::modf

      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
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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
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      expm1 (C++11)
      log
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      Les fonctions de puissance
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      Power functions
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      cbrt (C++11)
      hypot (C++11)
      pow
      Les fonctions trigonométriques et hyperboliques
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      Trigonometric and hyperbolic functions
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      cosh
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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)
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      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       modf(float x, float* iptr );
      double      modf(double x, double* iptr );
      longdouble modf(longdouble x, longdouble* iptr );
      Se décompose donné flottant x valeur du point en parties intégraux et fractionnaires, chacun ayant le même type et le signe que x. La partie intégrante (en virgule flottante) sont stockées dans l'objet pointé par iptr .
      Original:
      Decomposes given floating point value x into integral and fractional parts, each having the same type and sign as x. The integral part (in floating-point format) is stored in the object pointed to by iptr.
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      Sommaire

      [modifier]Paramètres

      arg -
      valeur du point flottant
      Original:
      floating point value
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      iptr -
      pointeur sur valeur du point flottant pour stocker la partie intégrante de la
      Original:
      pointer to floating point value to store the integral part to
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      [modifier]Retourne la valeur

      La partie fractionnaire de x avec le même signe que x. La partie intégrante est placée dans la valeur pointée par iptr .
      Original:
      The fractional part of x with the same sign as x. The integral part is put into the value pointed to by iptr.
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      [modifier]Exemple

      #include <iostream>#include <cmath>int main(){double f =123.45;double f3;double f2 = std::modf(f, &f3);std::cout<<"Given the number "<< f <<", "<<"modf() makes "<< f3 <<" and "<< f2 <<'\n';   f =-3.21; f2 = std::modf(f, &f3);std::cout<<"Given the number "<< f <<", "<<"modf() makes "<< f3 <<" and "<< f2 <<'\n';}

      Résultat : 

      Given the number 123.45, modf() makes 123 and 0.45 Given the number -3.21, modf() makes -3 and -0.21

      [modifier]Voir aussi

      (C++11)
      entier le plus proche n'est pas supérieure en grandeur à la valeur donnée
      Original:
      nearest integer not greater in magnitude than the given value
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      (fonction)[edit]
      Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/numeric/math/modf&oldid=48865 »
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