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std::numeric_limits::round_error

Da cppreference.com.

 
 
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Tipi base
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C numerico limita interfaccia
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Digitare costanti tratto
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static T round_error()
(C fino + 11)
static constexpr T round_error()
(dal C++11)
Restituisce il più grande possibile errore di arrotondamento in ULPs (unità l'ultimo posto) come definito dalla norma ISO 10967, che può variare da 0,5 (arrotondamento alla cifra più vicina) a 1.0 (arrotondamento a zero o all'infinito). E ha senso solo 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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[modifica] Valore di ritorno

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

[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Vedi anche

[statico]
identifica lo stile di arrotondamento usato dal tipo
Original:
identifies the rounding style used by the type
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(pubblico membro statico costante) [edit]