[header][C library] cmath (math.h)

*[header][C library] cmath (math.h)

<cmath> (math.h)

C numerics library

Header <cmath> declares a set of functions to compute common mathematical operations and transformations:

Functions

Trigonometric functions

cos

Compute cosine (function )

sin

Compute sine (function )

tan

Compute tangent (function )

acos

Compute arc cosine (function )

asin

Compute arc sine (function )

atan

Compute arc tangent (function )

atan2

Compute arc tangent with two parameters (function )

Hyperbolic functions

cosh

Compute hyperbolic cosine (function )

sinh

Compute hyperbolic sine (function )

tanh

Compute hyperbolic tangent (function )

acosh 

Compute area hyperbolic cosine (function )

asinh 

Compute area hyperbolic sine (function )

atanh 

Compute area hyperbolic tangent (function )

Exponential and logarithmic functions

exp

Compute exponential function (function )

frexp

Get significand and exponent (function )

ldexp

Generate value from significand and exponent (function )

log

Compute natural logarithm (function )

log10

Compute common logarithm (function )

modf

Break into fractional and integral parts (function )

exp2 

Compute binary exponential function (function )

expm1 

Compute exponential minus one (function )

ilogb 

Integer binary logarithm (function )

log1p 

Compute logarithm plus one (function )

log2 

Compute binary logarithm (function )

logb 

Compute floating-point base logarithm (function )

scalbn 

Scale significand using floating-point base exponent (function )

scalbln 

Scale significand using floating-point base exponent (long) (function )

Power functions

pow

Raise to power (function )

sqrt

Compute square root (function )

cbrt 

Compute cubic root (function )

hypot 

Compute hypotenuse (function )

Error and gamma functions

erf 

Compute error function (function )

erfc 

Compute complementary error function (function )

tgamma 

Compute gamma function (function )

lgamma 

Compute log-gamma function (function )

Rounding and remainder functions

ceil

Round up value (function )

floor

Round down value (function )

fmod

Compute remainder of division (function )

trunc 

Truncate value (function )

round 

Round to nearest (function )

lround 

Round to nearest and cast to long integer (function )

llround 

Round to nearest and cast to long long integer (function )

rint 

Round to integral value (function )

lrint 

Round and cast to long integer (function )

llrint 

Round and cast to long long integer (function )

nearbyint 

Round to nearby integral value (function )

remainder 

Compute remainder (IEC 60559) (function )

remquo 

Compute remainder and quotient (function )

Floating-point manipulation functions

copysign 

Copy sign (function )

nan 

Generate quiet NaN (function )

nextafter 

Next representable value (function )

nexttoward 

Next representable value toward precise value (function )

Minimum, maximum, difference functions

fdim 

Positive difference (function )

fmax 

Maximum value (function )

fmin 

Minimum value (function )

Other functions

fabs

Compute absolute value (function )

abs

Compute absolute value (function )

fma 

Multiply-add (function )

Macros / Functions

These are implemented as macros in C and as functions in C++:

Classification macro / functions

fpclassify 

Classify floating-point value (macro/function )

isfinite 

Is finite value (macro )

isinf 

Is infinity (macro/function )

isnan 

Is Not-A-Number (macro/function )

isnormal 

Is normal (macro/function )

signbit 

Sign bit (macro/function )

Comparison macro / functions

isgreater 

Is greater (macro )

isgreaterequal 

Is greater or equal (macro )

isless 

Is less (macro )

islessequal 

Is less or equal (macro )

islessgreater 

Is less or greater (macro )

isunordered 

Is unordered (macro )

Macro constants

math_errhandling 

Error handling (macro )

INFINITY 

Infinity (constant )

NAN

Not-A-Number (constant )

HUGE_VAL

Huge value (constant )

HUGE_VALF 

Huge float value

HUGE_VALL 

Huge long double value (constant )

This header also defines the following macro constants (since C99/C++11):

macro	type	description
MATH_ERRNO  MATH_ERREXCEPT	int	Bitmask value with the possible values math_errhandling can take.
FP_FAST_FMA  FP_FAST_FMAF  FP_FAST_FMAL	int	Each, if defined, identifies for which type fma is at least as efficient as x*y+z.
FP_INFINITE  FP_NAN  FP_NORMAL  FP_SUBNORMAL  FP_ZERO	int	The possible values returned by fpclassify.
FP_ILOGB0  FP_ILOGBNAN	int	Special values the ilogb function may return.

Types

double_t 

Floating-point type (type )

float_t

Floating-point type (type )

내용 출처 : http://www.cplusplus.com/reference/cmath/