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std::numeric_limits::min

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numeric_limits::min
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static T min()
 (até C++11)
static constexpr T min()
 (desde C++11)
Retorna o valor mínimo representável finito pelo T tipo numérico. Para os tipos de ponto flutuante com desnormalização retorna o valor positivo mínimo normalizado. Só faz sentido para os tipos limitadas e para ilimitados tipos não assinados, ou seja, tipos que representam um conjunto infinito de valores negativos não têm mínimo significativa.
Original:
Returns the minimum finite value representable by the numeric type T. For floating point types with denormalization returns the minimum positive normalized value. Only meaningful for bounded types and for unbounded unsigned types, that is, types that represent an infinite set of negative values have no meaningful minimum.
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Índice

[editar] Valor de retorno

T std::numeric_limits<T>::min()
/* non-specialized */ T();
bool false
char CHAR_MIN
signed char SCHAR_MIN
unsigned char ​0​
wchar_t WCHAR_MIN
char16_t ​0​
char32_t ​0​
short SHRT_MIN
unsigned short ​0​
int INT_MIN
unsigned int ​0​
long LONG_MIN
unsigned long ​0​
long long LLONG_MIN
unsigned long long ​0​
float FLT_MIN
double DBL_MIN
long double LDBL_MIN

[editar] Exceções

noexcept specification:  
noexcept
  (desde C++11)

[editar] Exemplo

Demonstra o uso com tipos typedef, ea diferença no sinal do resultado entre tipos inteiros e de ponto flutuante
Original:
Demonstrates the use with typedef types, and the difference in the sign of the result between integer and floating-point types
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#include <limits>
#include <cstddef>
#include <iostream>
int main()
{
    std::cout << "short: " << std::dec << std::numeric_limits<short>::min()
              << " or " << std::hex << std::showbase << std::numeric_limits<short>::min() << '\n'
              << "int: " << std::dec << std::numeric_limits<int>::min() << std::showbase
              << " or " << std::hex << std::numeric_limits<int>::min() << '\n' << std::dec 
              << "ptrdiff_t: " << std::numeric_limits<std::ptrdiff_t>::min() << std::showbase
              << " or " << std::hex << std::numeric_limits<std::ptrdiff_t>::min() << '\n'
              << "float: " << std::numeric_limits<float>::min()
              << " or " << std::hexfloat << std::numeric_limits<float>::min() << '\n'
              << "double: " << std::defaultfloat << std::numeric_limits<double>::min()
              << " or " << std::hexfloat << std::numeric_limits<double>::min() << '\n';
}

Saída: 

short: -32768 or 0x8000
int: -2147483648 or 0x80000000
ptrdiff_t: -9223372036854775808 or 0x8000000000000000
float: 1.17549e-38 or 0x1p-126
double: 2.22507e-308 or 0x1p-1022

[editar] Veja também

[estática] (C++11)
retorna o menor valor finito do tipo de dado
Original:
returns the lowest finite value of the given type
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(função public static membro) [edit]
[estática]
retorna o menor valor positivo subnormal do dado tipo de ponto flutuante
Original:
returns the smallest positive subnormal value of the given floating-point type
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(função public static membro) [edit]
[estática]
retorna o maior valor finito do tipo de dado
Original:
returns the largest finite value of the given type
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(função public static membro) [edit]
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