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std::numeric_limits::min_exponent

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std::numeric_limits
 
static const int min_exponent
(avant C++11)
static constexpr int min_exponent
(depuis C++11)
La valeur de std::numeric_limits<T>::min_exponent10 est le plus petit nombre négatif n tels que rn-1
, où r est std::numeric_limits<T>::radix est une valeur valide normalisée du type à virgule flottante T .
Original:
The value of std::numeric_limits<T>::min_exponent10 is the lowest negative number n such that rn-1
, where r is std::numeric_limits<T>::radix is a valid normalized value of the floating-point type T.
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[modifier] Spécialisations standard

T
valeur de std::numeric_limits<T>::min_exponent
Original:
value of std::numeric_limits<T>::min_exponent
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/* non-specialized */ 0
bool 0
char 0
signed char 0
unsigned char 0
wchar_t 0
char16_t 0
char32_t 0
short 0
unsigned short 0
int 0
unsigned int 0
long 0
unsigned long 0
long long 0
unsigned long long 0
float FLT_MIN_EXP
double DBL_MIN_EXP
long double LDBL_MIN_EXP

[modifier] Exemple

Montre les relations de min_exponent, min_exponent10, min, et radix pour le type float:
Original:
Demonstrates the relationships of min_exponent, min_exponent10, min, and radix for the type float:
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#include <iostream>
int main()
{
    std::cout << "min() = " << std::numeric_limits<float>::min() << '\n'
              << "min_exponent10 = " << std::numeric_limits<float>::min_exponent10 << '\n'
              << std::hexfloat
              << "min() = " << std::numeric_limits<float>::min() << '\n'
              << "min_exponent = " << std::numeric_limits<float>::min_exponent << '\n';
}

Résultat :

min() = 1.17549e-38
min_exponent10 = -37
min() = 0x1p-126
min_exponent = -125

[modifier] Voir aussi

[
statique
Original:
static
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]
la base ou la base utilisée par nombre entier de la représentation du type donné
Original:
the radix or integer base used by the representation of the given type
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(constante membre statique publique) [edit]
[
statique
Original:
static
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]
la plus petite puissance négative de dix qui est valide normalisé valeur à virgule flottante
Original:
the smallest negative power of ten that is a valid normalized floating-point value
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(constante membre statique publique) [edit]
[
statique
Original:
static
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]
un de plus que la plus grande puissance entière de la racine qui est valide finie valeur à virgule flottante
Original:
one more than the largest integer power of the radix that is a valid finite floating-point value
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(constante membre statique publique) [edit]
[
statique
Original:
static
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]
la plus grande puissance entière de 10 qui est valide finie valeur à virgule flottante
Original:
the largest integer power of 10 that is a valid finite floating-point value
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(constante membre statique publique) [edit]