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std::numeric_limits::max_exponent10

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std::numeric_limits
 
static const int max_exponent10
(até C + 11)
static constexpr int max_exponent10
(a partir do C++ 11)
O valor de std::numeric_limits<T>::max_exponent10 é o maior número positivo tal que n 10n
é um valor finito representável do tipo de ponto flutuante T.
Original:
The value of std::numeric_limits<T>::max_exponent10 is the largest positive number n such that 10n
is a representable finite value of the floating-point type T.
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[editar] Especializações padrão

T
valor de std::numeric_limits<T>::max_exponent10
Original:
value of std::numeric_limits<T>::max_exponent10
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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_10_EXP
double DBL_MAX_10_EXP
long double LDBL_MAX_10_EXP

[editar] Exemplo

Demonstra as relações de max_exponent, max_exponent10, e max () para o 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';
}

Output:

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

[editar] Veja também

[estática]
a menor potência negativa de 10 que é um valor válido de ponto flutuante normalizado
Original:
the smallest negative power of ten that is a valid normalized floating-point value
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(membro estático público constante) [edit]
[estática]
um a mais que o maior poder inteiro da raiz que é um valor válido de ponto flutuante finita
Original:
one more than the largest integer power of the radix that is a valid finite floating-point value
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(membro estático público constante) [edit]
max_exponent10
[estática]
a maior potência inteira de 10 que é um válido valor de ponto flutuante finita
Original:
the largest integer power of 10 that is a valid finite floating-point value
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(membro estático público constante) [edit]