FDIM(3) Linux Programmer's Manual FDIM(3) NAME fdim, fdimf, fdiml - positive difference SYNOPSIS #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 || _POSIX_C_SOURCE >= 200112L; 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 This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2010-09-20 FDIM(3)
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