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    std::trunc

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    <metanoindex/>

     
    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
    Original:
    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
    Original:
    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
    Original:
    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
    Original:
    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
    Original:
    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>
    Déclaré dans l'en-tête <cmath>
    float trunc( float arg );
    		 (depuis C++11)
    double trunc( double arg );
    		 (depuis C++11)
    long double trunc( long double arg );
    		 (depuis C++11)
    double trunc( Integral arg );
    		 (depuis C++11)
    Entier le plus proche calcule pas de plus grande ampleur que arg .
    Original:
    Computes nearest integer not greater in magnitude than arg.
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    Paramètres

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

    Entier le plus proche pas de plus grande ampleur que arg .
    Original:
    Nearest integer not greater in magnitude than arg.
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    [[Image:
    Retourne la valeur
    Original:
    {{{2}}}
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    |200x200px]]
    Argument

    Notes

    La valeur entière peut toujours être représentée par le type virgule flottante donné .
    Original:
    The integer value can be always represented by the given floating point type.
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    Voir aussi
    entier le plus proche n'est pas supérieure à la valeur donnée
    Original:
    nearest integer not greater than the given value
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    (fonction) [edit]
    entier le plus proche n'est pas inférieure à la valeur donnée
    Original:
    nearest integer not less than the given value
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    (fonction) [edit]
    (C++11)
    (C++11)
    (C++11)
    entier le plus proche, arrondi en s'éloignant de zéro dans les cas de transition
    Original:
    nearest integer, rounding away from zero in halfway cases
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    (fonction) [edit]