std::log1p

 

C++

Язык

Понятия (концепции)

Утилиты

Строки

Контейнеры

Алгоритмы

Итераторы

Работа с числами

Ввод / вывод

Локализация

Регулярные выражения (C++11)

Атомарные примитивы (C++11)

Потоки (C++11)

 

Numerics библиотеки

Общие математические функции

Плавающей точкой окружающей среды

Комплексные числа

Числовых массивов

Псевдослучайных чисел поколения

Во время компиляции рациональной арифметики (C++11)

Generic числовые операции Original: Generic numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iota (C++11)

accumulate

inner_product

adjacent_difference

partial_sum

 

Общие математические функции

Функции Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Основные операции Original: Basic operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
abs(int) labs llabs imaxabs (C++11) abs(float) fabs div ldiv lldiv imaxdiv (C++11) fmod	remainder (C++11) remquo (C++11) fma (C++11) fmax (C++11) fmin (C++11) fdim (C++11) nan nanf nanl (C++11) (C++11) (C++11)
Экспоненциальной функции Original: Exponential functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
exp exp2 (C++11) expm1 (C++11)	log log10 log1p (C++11) log2 (C++11)
Мощность функций Original: Power functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sqrt cbrt (C++11)	hypot (C++11) pow
Тригонометрические и гиперболические функции Original: Trigonometric and hyperbolic functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sin cos tan asin acos atan atan2	sinh cosh tanh asinh (C++11) acosh (C++11) atanh (C++11)

Ошибка и гамма-функции Original: Error and gamma functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
erf (C++11) erfc (C++11)	lgamma (C++11) tgamma (C++11)
Ближайшее целое число операций с плавающей точкой Original: Nearest integer floating point operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ceil floor round lround llround (C++11) (C++11) (C++11)	trunc (C++11) nearbyint (C++11) rint lrint llrint (C++11) (C++11) (C++11)
Плавающей точкой функции манипуляции Original: Floating point manipulation functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ldexp scalbn scalbln (C++11) (C++11) ilogb (C++11) logb (C++11)	frexp modf nextafter nexttoward (C++11) (C++11) copysign (C++11)
Классификация / сравнения Original: Classification/Comparison The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fpclassify (C++11) isfinite (C++11) isinf (C++11) isnan (C++11) isnormal (C++11) signbit (C++11)	isgreater (C++11) isgreaterequal (C++11) isless (C++11) islessequal (C++11) islessgreater (C++11) isunordered (C++11)
Макро констант Original: Macro constants The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
HUGE_VALF HUGE_VAL HUGE_VALL (C++11) (C++11) INFINITY (C++11) NAN (C++11) math_errhandling MATH_ERRNO MATH_ERREXCEPT (C++11)	FP_NORMAL FP_SUBNORMAL FP_ZERO FP_INFINITE FP_NAN (C++11) (C++11) (C++11) (C++11) (C++11)

 

Заголовочный файл <cmath>
float       log1p( float arg );		(начиная с C++11)
double      log1p( double arg );		(начиная с C++11)
long double log1p( long double arg );		(начиная с C++11)
double      log1p( Integral arg );		(начиная с C++11)

Вычисляет натуральный (базовый e) логарифм 1+arg. Эта функция является более точным, чем выражение std::log(1+arg) если arg близка к нулю.

Original:

Computes the natural (base e) logarithm of 1+arg. This function is more precise than the expression std::log(1+arg) if arg is close to zero.

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Параметры

arg

-

плавающей точкой Original: floating point value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Возвращаемое значение

ln(1+arg)

Домен ошибка возникает, если arg отрицательный. NAN возвращается в том случае.

Original:

Domain error occurs if arg is negative. NAN is returned in that case.

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Диапазон ошибка возникает, если arg является ​0​. -HUGE_VAL возвращается в том случае.

Original:

Range error occurs if arg is ​0​. -HUGE_VAL is returned in that case.

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См. также

log	вычисляет натуральный (базовый е) логарифм (на базе е) (ln(x)) Original: computes natural (base e) logarithm (to base e) (ln(x)) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)
expm1 (C++11)	возвращает е поднят на заданной мощности, минус один (ex-1) Original: returns e raised to the given power, minus one (ex-1) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)
log10	вычисляет общие (базовые 10) логарифм (log10(x)) Original: computes common (base 10) logarithm (log10(x)) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)
log2 (C++11)	логарифм по основанию 2 из заданного числа Original: base 2 logarithm of the given number The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)