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std::numeric_limits::max

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std::numeric_limits
 
static T max()
(até C + 11)
static constexpr T max()
(a partir do C++ 11)
Retorna o valor máximo finito representável pela T tipo numérico. Significativa para todos os tipos limitadas.
Original:
Returns the maximum finite value representable by the numeric type T. Meaningful for all bounded types.
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Índice

[editar] Valor de retorno

T std::numeric_limits<T>::max()
/* non-specialized */ T();
bool true
char CHAR_MAX
signed char SCHAR_MAX
unsigned char UCHAR_MAX
wchar_t WCHAR_MAX
char16_t UINT_LEAST16_MAX
char32_t UINT_LEAST32_MAX
short SHRT_MAX
unsigned short USHRT_MAX
int INT_MAX
unsigned int UINT_MAX
long LONG_MAX
unsigned long ULONG_MAX
long long LLONG_MAX
unsigned long long ULLONG_MAX
float FLT_MAX
double DBL_MAX
long double LDBL_MAX

[editar] Exceções

noexcept specification:  
noexcept
  (a partir do C++ 11)

[editar] Exemplo

Demonstra o uso de max () com alguns tipos fundamentais e alguns typedefs biblioteca padrão (a saída é específico do sistema)
Original:
Demonstrates the use of max() with some fundamental types and some standard library typedefs (the output is system-specific)
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#include <limits>
#include <cstddef>
#include <iostream>
int main()
{
    std::cout << "short: " << std::dec << std::numeric_limits<short>::max()
              << " or " << std::hex << std::showbase << std::numeric_limits<short>::max() << '\n'
              << "int: " << std::dec << std::numeric_limits<int>::max()
              << " or " << std::hex << std::numeric_limits<int>::max() << '\n' << std::dec
              << "streamsize: " << std::dec << std::numeric_limits<std::streamsize>::max()
              << " or " << std::hex << std::numeric_limits<std::streamsize>::max() << '\n'
              << "size_t: " << std::dec << std::numeric_limits<std::size_t>::max()
              << " or " << std::hex << std::numeric_limits<std::size_t>::max() << '\n'
              << "float: " << std::numeric_limits<float>::max()
              << " or " << std::hexfloat << std::numeric_limits<float>::max() << '\n'
              << "double: " << std::defaultfloat << std::numeric_limits<double>::max()
              << " or " << std::hexfloat << std::numeric_limits<double>::max() << '\n';
}

Output:

short: 32767 or 0x7fff
int: 2147483647 or 0x7fffffff
size_t: 18446744073709551615 or 0xffffffffffffffff
streamsize: 9223372036854775807 or 0x7fffffffffffffff
float: 3.40282e+38 or 0x1.fffffep+127
double: 1.79769e+308 or 0x1.fffffffffffffp+1023

[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 finito do tipo de dado
Original:
returns the smallest finite value of the given type
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You can help to correct and verify the translation. Click here for instructions.

(função public static membro) [edit]