SIGNBIT(3) BSD Library Functions Manual SIGNBIT(3)

NAME
     ssiiggnnbbiitt - determine whether a floating-point number's sign is negative

LLIIBBRRAARRYY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##iinncclluuddee <>

     int
     ssiiggnnbbiitt(real-floating x);

DESCRIPTION
     The ssiiggnnbbiitt() macro takes an argument of x and returns non-zero if the
     value of its sign is negative, otherwise 0.

SEE ALSO
     fpclassify(3), math(3)

STANDARDS     The ssiiggnnbbiitt() macro conforms to ISO/IEC 9899:1999 (``ISO C99'').

BSD                            February 11, 2003                           BSD