FDIM(3) BSD Library Functions Manual FDIM(3)
fdim, fdimf, fdiml -- positive difference functions
Math Library (libm, -lm)
fdim(double x, double y);
fdimf(float x, float y);
fdiml(long double x, long double y);
The fdim(), fdimf(), and fdiml() functions return the positive difference between x and y.
That is, if x-y is positive, then x-y is returned. If either x or y is an NaN, then an NaN
is returned. Otherwise, the result is +0.0.
Overflow or underflow may occur iff the exact result is not representable in the return
type. No other exceptions are raised.
fabs(3), fmax(3), fmin(3), math(3)
The fdim(), fdimf(), and fdiml() functions conform to ISO/IEC 9899:1999 (``ISO C99'').
These routines first appeared in FreeBSD 5.3 and NetBSD 5.1.
BSD June 29, 2004 BSD