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fdim
Langue: en
Version: 2008-08-11 (fedora - 05/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
fdim, fdimf, fdiml - positive differenceSYNOPSIS
#include <math.h>double fdim(double x, double y);
float fdimf(float x, float y);
long double fdiml(long double x, long double y);
Link with -lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
fdimf(), fdiml(): _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99
DESCRIPTION
These functions return the positive difference, max(x-y,0), between their arguments.RETURN VALUE
On success, these functions return the positive difference.If x or y is a NaN, a NaN is returned.
If the result overflows, a range error occurs, and the functions return HUGE_VAL, HUGE_VALF, or HUGE_VALL, respectively.
ERRORS
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.The following errors can occur:
- Range error: result overflow
- An overflow floating-point exception (FE_OVERFLOW) is raised.
These functions do not set errno.
VERSIONS
These functions first appeared in glibc in version 2.1.CONFORMING TO
C99, POSIX.1-2001.SEE ALSO
fmax(3)COLOPHON
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