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std::numeric_limits::round_error

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std::numeric_limits
 
static T round_error()
(até C + 11)
static constexpr T round_error()
(a partir do C++ 11)
Retorna o erro de arredondamento a maior possível em ULPS (unidades em último lugar), conforme definido pela norma ISO 10967, que pode variar de 0,5 (arredondamento para o próximo dígito) a 1,0 (arredondamento para zero ou para infinito). Ela só faz sentido se std::numeric_limits<T>::is_integer == false.
Original:
Returns the largest possible rounding error in ULPs (units in the last place) as defined by ISO 10967, which can vary from 0.5 (rounding to the nearest digit) to 1.0 (rounding to zero or to infinity). It is only meaningful if std::numeric_limits<T>::is_integer == false.
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[editar] Valor de retorno

T std::numeric_limits<T>::round_error()
/* non-specialized */ T();
bool false
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 0.5F
double 0.5
long double 0.5L

[editar] Exceções

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

[editar] Veja também

[estática]
identifica o estilo arredondamento usado pelo tipo
Original:
identifies the rounding style used by the type
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(membro estático público constante) [edit]