[C++] nermeric_limits

# nermeric_limits

 

class template으로

특정 플랫폼에서 정수 혹은 부동 소수점의 type에 대한 정보를 제공함

 

ex)

std::numeric_limits<int>::min() // -2147483648

std::numeric_limits<int>::max() // 2147483647

 

Member

min() : type에 대한 최소값을 반환해줌

max() : type에 대한 최대값을 반환해줌

등...

 

자세히(https://msdn.microsoft.com/ko-kr/library/c707ct0t.aspx)

denorm_min	Returns the smallest nonzero denormalized value.
digits	Returns the number of radix digits that the type can represent without loss of precision.
digits10	Returns the number of decimal digits that the type can represent without loss of precision.
epsilon	Returns the difference between 1 and the smallest value greater than 1 that the data type can represent.
has_denorm	Tests whether a type allows denormalized values.
has_denorm_loss	Tests whether loss of accuracy is detected as a denormalization loss rather than as an inexact result.
has_infinity	Tests whether a type has a representation for positive infinity.
has_quiet_NaN	Tests whether a type has a representation for a quiet not a number (NAN), which is nonsignaling.
has_signaling_NaN	Tests whether a type has a representation for signaling not a number (NAN).
infinity	The representation for positive infinity for a type, if available.
is_bounded	Tests if the set of values that a type may represent is finite.
is_exact	Tests if the calculations done on a type are free of rounding errors.
is_iec559	Tests if a type conforms to IEC 559 standards.
is_integer	Tests if a type has an integer representation.
is_modulo	Tests if a type has a modulo representation.
is_signed	Tests if a type has a signed representation.
is_specialized	Tests if a type has an explicit specialization defined in the template class numeric_limits.
lowest	Returns the most negative finite value.
max	Returns the maximum finite value for a type.
max_digits10	Returns the number of decimal digits required to ensure that two distinct values of the type have distinct decimal representations.
max_exponent	Returns the maximum positive integral exponent that the floating-point type can represent as a finite value when a base of radix is raised to that power.
max_exponent10	Returns the maximum positive integral exponent that the floating-point type can represent as a finite value when a base of ten is raised to that power.
min	Returns the minimum normalized value for a type.
min_exponent	Returns the maximum negative integral exponent that the floating-point type can represent as a finite value when a base of radix is raised to that power.
min_exponent10	Returns the maximum negative integral exponent that the floating-point type can represent as a finite value when a base of ten is raised to that power.
quiet_NaN	Returns the representation of a quiet not a number (NAN) for the type.
radix	Returns the integral base, referred to as radix, used for the representation of a type.
round_error	Returns the maximum rounding error for the type.
round_style	Returns a value that describes the various methods that an implementation can choose for rounding a floating-point value to an integer value.
signaling_NaN	Returns the representation of a signaling not a number (NAN) for the type.
tinyness_before	Tests whether a type can determine that a value is too small to represent as a normalized value before rounding it.
traps	Tests whether trapping that reports on arithmetic exceptions is implemented for a type.