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std::numeric_limits::digits

Da cppreference.com.

 
 
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Funzione oggetti
initializer_list(C++11)
bitset
hash(C++11)
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tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
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Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
Tipo di supporto
Tipi base
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Basic types
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Tipi fondamentali
Larghezza fissa interi tipi (C++11)
Limiti numerici
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Numeric limits
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numeric_limits
C numerico limita interfaccia
Informazioni sul tipo di runtime
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is_class(C++11)
is_function(C++11)
is_object(C++11)
is_scalar(C++11)
is_compound(C++11)
is_integral(C++11)
is_floating_point(C++11)
is_fundamental(C++11)
is_arithmetic(C++11)
is_reference(C++11)
is_lvalue_reference(C++11)
is_rvalue_reference(C++11)
is_member_pointer(C++11)
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Operazioni supportate
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(C++11)
(C++11)
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(C++11)
(C++11)
is_move_constructible
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(C++11)
is_assignable
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(C++11)
(C++11)
is_copy_assignable
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(C++11)
(C++11)
is_move_assignable
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(C++11)
(C++11)
is_destructible
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(C++11)
(C++11)
(C++11)
has_virtual_destructor(C++11)
I rapporti e le query di proprietà
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Relationships and property queries
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rank(C++11)
extent(C++11)
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(C++11)
(C++11)
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(C++11)
(C++11)
make_signed(C++11)
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Tipo di trasformazioni
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aligned_storage(C++11)
aligned_union(C++11)
decay(C++11)
enable_if(C++11)
conditional(C++11)
common_type(C++11)
underlying_type(C++11)
result_of(C++11)
Digitare costanti tratto
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Type trait constants
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integral_constant(C++11)
 
 
static const int digits
(C fino + 11)
static constexpr int digits
(dal C++11)
Il valore del std::numeric_limits<T>::digits è il numero di cifre in base-radix che possono essere rappresentati dalla T tipo senza cambiamenti. Per i tipi interi, questo è il numero di bit senza contare il bit di segno. Per i tipi a virgola mobile, questo è il numero di cifre nella mantissa.
Original:
The value of std::numeric_limits<T>::digits is the number of digits in base-radix that can be represented by the type T without change. For integer types, this is the number of bits not counting the sign bit. For floating-point types, this is the number of digits in the mantissa.
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[modifica] Specializzazioni standard

T
valore di std::numeric_limits<T>::digits
Original:
value of std::numeric_limits<T>::digits
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/* non-specialized */ 0
bool 1
char CHAR_BIT - std::numeric_limits<char>::is_signed
signed char CHAR_BIT-1
unsigned char CHAR_BIT
wchar_t CHAR_BIT*sizeof(wchar_t) - std::numeric_limits<wchar_t>::is_signed
char16_t CHAR_BIT*sizeof(char16_t)
char32_t CHAR_BIT*sizeof(char32_t)
short CHAR_BIT*sizeof(short)-1
unsigned short CHAR_BIT*sizeof(short)
int CHAR_BIT*sizeof(int)-1
unsigned int CHAR_BIT*sizeof(int)
long CHAR_BIT*sizeof(long)-1
unsigned long CHAR_BIT*sizeof(long)
long long CHAR_BIT*sizeof(long long)-1
unsigned long long CHAR_BIT*sizeof(long)
float FLT_MANT_DIG
double DBL_MANT_DIG
long double LDBL_MANT_DIG

[modifica] Vedi anche

[statico]
la radice o base intero utilizzato dalla rappresentazione del tipo specificato
Original:
the radix or integer base used by the representation of the given type
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(pubblico membro statico costante) [edit]
[statico]
oltre la più piccola potenza negativa della radice che è una valida virgola mobile normalizzato valore uno
Original:
one more than the smallest negative power of the radix that is a valid normalized floating-point value
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(pubblico membro statico costante) [edit]
[statico]
maggiore della massima potenza intera della radice che è una valida finita valore a virgola mobile uno
Original:
one more than the largest integer power of the radix that is a valid finite floating-point value
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(pubblico membro statico costante) [edit]