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std::numeric_limits::digits

提供: cppreference.com

 
 
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static const int digits
(C++11以前)
static constexpr int digits
(C++11およびそれ以降)
std::numeric_limits<T>::digitsの値は変更せずに型radixで表すことができ、ベースTの桁数です。整数型の場合、これは符号ビットを数えていないビットの数です。浮動小数点型の場合、これは、仮数部の桁数を指定します.
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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[編集] 標準の専門分野

T
std::numeric_limits<T>::digitsの値
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

[編集] も参照してください

[静的]
基数または指定されたタイプの表現で用いられる整数ベース
Original:
the radix or integer base used by the representation of the given type
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(パブリック静的メンバ定数) [edit]
有効な正規化された浮動小数点値である基数の最小の負のパワーよりも1
Original:
one more than the smallest negative power of the radix that is a valid normalized floating-point value
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(パブリック静的メンバ定数) [edit]
有効な有限浮動小数点値である基数の最大の整数乗よりも1
Original:
one more than the largest integer power of the radix that is a valid finite floating-point value
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(パブリック静的メンバ定数) [edit]