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    log1p

    De cppreference.com
    < c | numeric | math

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    C
     
    Numerics
     
    Fonctions mathématiques courantes
    Fonctions
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    Functions
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    Opérations de base
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    Basic operations
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    remainder (C99)
    remquo (C99)
    fma (C99)
    fmax (C99)
    fmin (C99)
    fdim (C99)
    nan
    nanf
    nanl    		 (C99)
    (C99)
    (C99)
    Les fonctions exponentielles
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    Exponential functions
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    exp
    exp2 (C99)
    expm1 (C99)
    log
    log10
    log1p (C99)
    log2 (C99)
    Les fonctions de puissance
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    Power functions
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    cbrt (C99)
    hypot (C99)
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    Les fonctions trigonométriques et hyperboliques
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    Trigonometric and hyperbolic functions
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    sinh
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    Erreur fonctions et gamma
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    Error and gamma functions
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    erf (C99)
    erfc (C99)
    lgamma (C99)
    tgamma (C99)
    Entier le plus proche opérations en virgule flottante
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    Nearest integer floating point operations
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    ceil
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    llround    		 (C99)
    (C99)
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    rint
    lrint
    llrint    		 (C99)
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    Flottant fonctions de manipulation de points
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    Floating point manipulation functions
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    ldexp
    scalbn
    scalbln    		 (C99)
    (C99)
    ilogb (C99)
    logb (C99)
    Classification
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    Classification
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    fpclassify (C99)
    isfinite (C99)
    isinf (C99)
    isnan (C99)
    isnormal (C99)
    signbit (C99)
    Macro constantes
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    Macro constants
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    FP_NORMAL
    FP_SUBNORMAL
    FP_ZERO
    FP_INFINITE
    FP_NAN    		 (C99)
    (C99)
    (C99)
    (C99)
    (C99)
     
    <tbody> </tbody>
    Déclaré dans l'en-tête <math.h>
    float log1pf( float arg );
    double log1p( double arg );
    long double log1pl( long double arg );
    Calcule le naturel (base e) logarithme de 1+arg. Cette fonction est plus précise que l'expression 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 log(1+arg) if arg is close to zero.
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    Paramètres

    arg -
    valeur du point flottant
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    floating point value
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    Retourne la valeur

    ln(1+arg)

    Erreur de domaine se produit si arg est négatif. NAN est retourné dans ce cas .
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    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 .
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    Range error occurs if arg is 0. -HUGE_VAL is returned in that case.
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    Voir aussi
    calcule naturel (base e) logarithme (de base e) (ln(x))
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    computes natural (base e) logarithm (to base e) (ln(x))
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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++ documentation for log1p