signbit(3) BSD Library Functions Manual signbit(3)
NAME
signbit -- determine whether a floating-point number's sign is negative
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <math.h>
int
signbit(real-floating x);
DESCRIPTION
The signbit() macro takes an argument of x. It returns non-zero if the
value of the argument's sign is negative, otherwise 0.
SEE ALSO
fpclassify(3), math(3)
STANDARDS
The signbit() macro conforms to ISO/IEC 9899:1999 (``ISO C99'').
BSD February 11, 2003 BSD
Mac OS X 10.8 - Generated Fri Aug 31 05:27:06 CDT 2012