原始网页数据: https://cplusplus.com/reference/cmath/
对于下列文本:
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)
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