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std::numeric_limits::digits

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std::numeric_limits
 
static const int digits
(bis C + +11)
static constexpr int digits
(seit C++11)
Der Wert std::numeric_limits<T>::digits ist die Anzahl der Stellen in der Basis-radix, die vom Typ T unverändert dargestellt werden kann. Für Integer-Typen ist dies die Anzahl der Bits nicht mitgerechnet die Vorzeichenbit. Bei Fließkomma-Typen ist dies die Anzahl der Ziffern in der Mantisse .
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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[Bearbeiten] Standard Spezialisierungen

T
Wert 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

[Bearbeiten] Siehe auch

[statisch]
die Radix oder Integer Basis durch die Darstellung des angegebenen Typs verwendet
Original:
the radix or integer base used by the representation of the given type
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(public static Mitglied konstanten) [edit]
[statisch]
eine mehr als die kleinste negative Macht des Radix, die eine gültige normalisierten Gleitkomma-Wert ist
Original:
one more than the smallest negative power of the radix that is a valid normalized floating-point value
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(public static Mitglied konstanten) [edit]
[statisch]
eine mehr als die größte ganze Macht der radix, die eine gültige endlichen Floating-Point-Wert ist
Original:
one more than the largest integer power of the radix that is a valid finite floating-point value
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(public static Mitglied konstanten) [edit]