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std::numeric_limits::max_exponent

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std::numeric_limits
 
static const int max_exponent
(hasta C++11)
static constexpr int max_exponent
(desde C++11)
El valor de std::numeric_limits<T>::max_exponent es el mayor número positivo tal que n 10n-1
es un valor representable finita del tipo de punto flotante T .
Original:
The value of std::numeric_limits<T>::max_exponent is the largest positive number n such that 10n-1
is a representable finite value of the floating-point type T.
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[editar] Especializaciones estándar

T
valor de std::numeric_limits<T>::max_exponent
Original:
value of std::numeric_limits<T>::max_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_MAX_EXP
double DBL_MAX_EXP
long double LDBL_MAX_EXP

[editar] Ejemplo

Muestra las relaciones de max_exponent, max_exponent10 y max () para el tipo float:
Original:
Demonstrates the relationships of max_exponent, max_exponent10, and max() for the type float:
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#include <iostream>
int main()
{
    std::cout << "max() = " << std::numeric_limits<float>::max() << '\n'
              << "max_exponent10 = " << std::numeric_limits<float>::max_exponent10 << '\n'
              << std::hexfloat
              << "max() = " << std::numeric_limits<float>::max() << '\n'
              << "max_exponent = " << std::numeric_limits<float>::max_exponent << '\n';
}

Salida:

max() = 3.40282e+38
max_exponent10 = 38
max() = 0x1.fffffep+127
max_exponent = 128

[editar] Ver también

[estático]
la menor potencia negativa de diez que es válida normalizada valor de punto flotante
Original:
the smallest negative power of ten that is a valid normalized floating-point value
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(miembro público estático constante) [editar]
[estático]
más que la menor potencia negativa de la base de que es un válido punto flotante normalizado valor uno
Original:
one more than the smallest negative power of the radix that is a valid normalized floating-point value
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(miembro público estático constante) [editar]
[estático]
la mayor potencia entera de 10, que es válida finito valor de punto flotante
Original:
the largest integer power of 10 that is a valid finite floating-point value
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(miembro público estático constante) [editar]