Standard library header <math.h> - cppreference.com (original) (raw)
This header is part of the mathematics library.
Contents
[edit] Types
| | most efficient floating-point type at least as wide as float (typedef) [edit] | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | most efficient floating-point type at least as wide as double (typedef) [edit] |
[edit] Constants
| HUGE_VALFHUGE_VALHUGE_VALL(C99)(C99) | indicates value too big to be representable (infinity) by float, double and long double respectively (macro constant) [edit] |
|---|---|
| INFINITY(C99) | evaluates to positive infinity or the value guaranteed to overflow a float (macro constant) [edit] |
| NAN(C99) | evaluates to a quiet NaN of type float (macro constant) [edit] |
| FP_FAST_FMAFFP_FAST_FMAFP_FAST_FMAL(C99)(C99)(C99) | indicates that the fma function generally executes about as fast as, or faster than, a multiply and an add of double operands (macro constant) [edit] |
| FP_ILOGB0FP_ILOGBNAN(C99)(C99) | evaluates to ilogb(x) if x is zero or NaN, respectively (macro constant) [edit] |
| math_errhandlingMATH_ERRNOMATH_ERREXCEPT(C99)(C99)(C99) | defines the error handling mechanism used by the common mathematical functions (macro constant) [edit] |
| Classification | |
| FP_NORMALFP_SUBNORMALFP_ZEROFP_INFINITEFP_NAN(C99)(C99)(C99)(C99)(C99) | indicates a floating-point category (macro constant) [edit] |
[edit] Functions
| Basic operations | |
|---|---|
| fabsfabsffabsl(C99)(C99) | computes absolute value of a floating-point value (\(\small{|x |
| fmodfmodffmodl(C99)(C99) | computes remainder of the floating-point division operation (function) [edit] |
| remainderremainderfremainderl(C99)(C99)(C99) | computes signed remainder of the floating-point division operation (function) [edit] |
| remquoremquofremquol(C99)(C99)(C99) | computes signed remainder as well as the three last bits of the division operation (function) [edit] |
| fmafmaffmal(C99)(C99)(C99) | computes fused multiply-add operation (function) [edit] |
| fmaxfmaxffmaxl(C99)(C99)(C99) | determines larger of two floating-point values (function) [edit] |
| fminfminffminl(C99)(C99)(C99) | determines smaller of two floating-point values (function) [edit] |
| fdimfdimffdiml(C99)(C99)(C99) | determines positive difference of two floating-point values (\({\small\max{(0, x-y)} }\)max(0, x-y)) (function) [edit] |
| nannanfnanl(C99)(C99)(C99) | returns a NaN (not-a-number) (function) [edit] |
| Exponential functions | |
| expexpfexpl(C99)(C99) | computes e raised to the given power (\({\small e^x}\)ex) (function) [edit] |
| exp2exp2fexp2l(C99)(C99)(C99) | computes 2 raised to the given power (\({\small 2^x}\)2x) (function) [edit] |
| expm1expm1fexpm1l(C99)(C99)(C99) | computes e raised to the given power, minus one (\({\small e^x-1}\)ex-1) (function) [edit] |
| loglogflogl(C99)(C99) | computes natural (base-e) logarithm (\({\small \ln{x} }\)ln(x)) (function) [edit] |
| log10log10flog10l(C99)(C99) | computes common (base-10) logarithm (\({\small \log_{10}{x} }\)log10(x)) (function) [edit] |
| log2log2flog2l(C99)(C99)(C99) | computes base-2 logarithm (\({\small \log_{2}{x} }\)log2(x)) (function) [edit] |
| log1plog1pflog1pl(C99)(C99)(C99) | computes natural (base-e) logarithm of 1 plus the given number (\({\small \ln{(1+x)} }\)ln(1+x)) (function) [edit] |
| Power functions | |
| powpowfpowl(C99)(C99) | computes a number raised to the given power (\(\small{x^y}\)xy) (function) [edit] |
| sqrtsqrtfsqrtl(C99)(C99) | computes square root (\(\small{\sqrt{x} }\)√x) (function) [edit] |
| cbrtcbrtfcbrtl(C99)(C99)(C99) | computes cube root (\(\small{\sqrt[3]{x} }\)3√x) (function) [edit] |
| hypothypotfhypotl(C99)(C99)(C99) | computes square root of the sum of the squares of two given numbers (\(\scriptsize{\sqrt{x^2+y^2} }\)√x2+y2) (function) [edit] |
| Trigonometric functions | |
| sinsinfsinl(C99)(C99) | computes sine (\({\small\sin{x} }\)sin(x)) (function) [edit] |
| coscosfcosl(C99)(C99) | computes cosine (\({\small\cos{x} }\)cos(x)) (function) [edit] |
| tantanftanl(C99)(C99) | computes tangent (\({\small\tan{x} }\)tan(x)) (function) [edit] |
| asinasinfasinl(C99)(C99) | computes arc sine (\({\small\arcsin{x} }\)arcsin(x)) (function) [edit] |
| acosacosfacosl(C99)(C99) | computes arc cosine (\({\small\arccos{x} }\)arccos(x)) (function) [edit] |
| atanatanfatanl(C99)(C99) | computes arc tangent (\({\small\arctan{x} }\)arctan(x)) (function) [edit] |
| atan2atan2fatan2l(C99)(C99) | computes arc tangent, using signs to determine quadrants (function) [edit] |
| Hyperbolic functions | |
| sinhsinhfsinhl(C99)(C99) | computes hyperbolic sine (\({\small\sinh{x} }\)sinh(x)) (function) [edit] |
| coshcoshfcoshl(C99)(C99) | computes hyperbolic cosine (\({\small\cosh{x} }\)cosh(x)) (function) [edit] |
| tanhtanhftanhl(C99)(C99) | computes hyperbolic tangent (\({\small\tanh{x} }\)tanh(x)) (function) [edit] |
| asinhasinhfasinhl(C99)(C99)(C99) | computes inverse hyperbolic sine (\({\small\operatorname{arsinh}{x} }\)arsinh(x)) (function) [edit] |
| acoshacoshfacoshl(C99)(C99)(C99) | computes inverse hyperbolic cosine (\({\small\operatorname{arcosh}{x} }\)arcosh(x)) (function) [edit] |
| atanhatanhfatanhl(C99)(C99)(C99) | computes inverse hyperbolic tangent (\({\small\operatorname{artanh}{x} }\)artanh(x)) (function) [edit] |
| Error and gamma functions | |
| erferfferfl(C99)(C99)(C99) | computes error function (function) [edit] |
| erfcerfcferfcl(C99)(C99)(C99) | computes complementary error function (function) [edit] |
| tgammatgammaftgammal(C99)(C99)(C99) | computes gamma function (function) [edit] |
| lgammalgammaflgammal(C99)(C99)(C99) | computes natural (base-e) logarithm of the gamma function (function) [edit] |
| Nearest integer floating-point operations | |
| ceilceilfceill(C99)(C99) | computes smallest integer not less than the given value (function) [edit] |
| floorfloorffloorl(C99)(C99) | computes largest integer not greater than the given value (function) [edit] |
| trunctruncftruncl(C99)(C99)(C99) | rounds to nearest integer not greater in magnitude than the given value (function) [edit] |
| roundroundfroundllroundlroundflroundlllroundllroundfllroundl(C99)(C99)(C99)(C99)(C99)(C99)(C99)(C99)(C99) | rounds to nearest integer, rounding away from zero in halfway cases (function) [edit] |
| nearbyintnearbyintfnearbyintl(C99)(C99)(C99) | rounds to an integer using current rounding mode (function) [edit] |
| rintrintfrintllrintlrintflrintlllrintllrintfllrintl(C99)(C99)(C99)(C99)(C99)(C99)(C99)(C99)(C99) | rounds to an integer using current rounding mode with exception if the result differs (function) [edit] |
| Floating-point manipulation functions | |
| frexpfrexpffrexpl(C99)(C99) | breaks a number into significand and a power of 2 (function) [edit] |
| ldexpldexpfldexpl(C99)(C99) | multiplies a number by 2 raised to a power (function) [edit] |
| modfmodffmodfl(C99)(C99) | breaks a number into integer and fractional parts (function) [edit] |
| scalbnscalbnfscalbnlscalblnscalblnfscalblnl(C99)(C99)(C99)(C99)(C99)(C99) | computes efficiently a number times FLT_RADIX raised to a power (function) [edit] |
| ilogbilogbfilogbl(C99)(C99)(C99) | extracts exponent of the given number (function) [edit] |
| logblogbflogbl(C99)(C99)(C99) | extracts exponent of the given number (function) [edit] |
| nextafternextafterfnextafterlnexttowardnexttowardfnexttowardl(C99)(C99)(C99)(C99)(C99)(C99) | determines next representable floating-point value towards the given value (function) [edit] |
| copysigncopysignfcopysignl(C99)(C99)(C99) | produces a value with the magnitude of a given value and the sign of another given value (function) [edit] |
| Classification and comparison | |
| fpclassify(C99) | classifies the given floating-point value (function macro) [edit] |
| isfinite(C99) | checks if the given number has finite value (function macro) [edit] |
| isinf(C99) | checks if the given number is infinite (function macro) [edit] |
| isnan(C99) | checks if the given number is NaN (function macro) [edit] |
| isnormal(C99) | checks if the given number is normal (function macro) [edit] |
| signbit(C99) | checks if the given number is negative (function macro) [edit] |
| isgreater(C99) | checks if the first floating-point argument is greater than the second (function macro) [edit] |
| isgreaterequal(C99) | checks if the first floating-point argument is greater or equal than the second (function macro) [edit] |
| isless(C99) | checks if the first floating-point argument is less than the second (function macro) [edit] |
| islessequal(C99) | checks if the first floating-point argument is less or equal than the second (function macro) [edit] |
| islessgreater(C99) | checks if the first floating-point argument is less or greater than the second (function macro) [edit] |
| isunordered(C99) | checks if two floating-point values are unordered (function macro) [edit] |
[edit] Synopsis
#define STDC_VERSION_MATH_H 202311L // TODO: ...