<cmath> (math.h)

C numerics library

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

Functions

Trigonometric functions

Hyperbolic functions

Exponential and logarithmic functions

Power functions

Error and gamma functions

Rounding and remainder functions

Floating-point manipulation functions

Minimum, maximum, difference functions

Other functions

Macros / Functions

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

Classification macro / functions

Comparison macro / functions

Macro constants

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

macrotypedescription
MATH_ERRNO
MATH_ERREXCEPTintBitmask value with the possible values math_errhandling can take.
FP_FAST_FMA
FP_FAST_FMAF
FP_FAST_FMALintEach, 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_ZEROintThe possible values returned by fpclassify.
FP_ILOGB0
FP_ILOGBNANintSpecial values the ilogb function may return.