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    <metanoindex/>

     
    C++
     
    Bibliothque Numerics
    Fonctions mathmatiques courantes
    Virgule flottante environnement
    Nombres complexes
    Tableaux numriques
    La gnration de nombres pseudo-alatoires
    Moment de la compilation arithmtique rationnelle (C++11)
    Gnriques des oprations numriques
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    Generic numeric operations
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    iota (C++11)
    accumulate
    inner_product
    adjacent_difference
    partial_sum
     
    Fonctions mathmatiques courantes
    {{{1}}}
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    {{{2}}}
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    Fonctions
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    Functions
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    Oprations 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 trigonomtriques 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 oprations 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)
     
    <tbody> </tbody>
    Dclar dans l'en-tte <cmath>
    float modf( float x, float* iptr );
    double modf( double x, double* iptr );
    long double modf( long double x, long double* iptr );
    Se dcompose donn flottant x valeur du point en parties intgraux et fractionnaires, chacun ayant le mme type et le signe que x. La partie intgrante (en virgule flottante) sont stockes dans l'objet point 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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    Paramtres

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

    La partie fractionnaire de x avec le mme signe que x. La partie intgrante est place dans la valeur pointe 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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    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';
}

    Rsultat : 

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

    Voir aussi

    (C++11)
    entier le plus proche n'est pas suprieure en grandeur la valeur donne
    Original:
    nearest integer not greater in magnitude than the given value
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    (fonction) [edit]
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