#include <math.h>
double erf(double x);
float erff(float x);
double erfc(double x);
float erfcf(float x);
erf " ", , ( ).
erfc , . . erfc(x) = 1 - erf(x). erfc , , ( x ) 1.
erff erfcf .
erf - 0 1.
ANSI C.
Exp, expf -
#include <math.h>
double exp(double x);
float expf(float x);
exp expf , e ( e - , 2.71828).
matherr (-ANSI) .
exp expf . , 0. , HUGE_VAL. errno ERANGE.
exp co ANSI. expf .
Expm1, expm1f - 1
#include <math.h>
double expm1(double x);
float expm1f(float x);
expm1 expm1f 1, . . , 1. ( e - , 2.71828). , exp(x)-1 .
exp1, expm1f ANSI System V Interface Definition.
Fabs, fabsf - ()
#include <math.h>
double fabs(double x);
float fabsf(float x);
fabs fabsf x, () . .
. .
fabs co ANSI. fabsf .
Floor, floorf, ceil, ceilf -
#include <math.h>
double floor(double x);
float floorf(float x);
double ceil(double x);
float ceilf(float x);
floor floorf , . ceil ceilf , .
floor ceil double. floorf ceilf float.
floor ceil co ANSI. floorf ceilf .