ISGREATER(3) BSD Library Functions Manual ISGREATER(3)

NAME
     iissggrreeaatteerr, iissggrreeaatteerreeqquuaall, iisslleessss, iisslleesssseeqquuaall, iisslleessssggrreeaatteerr,
     iissuunnoorrddeerreedd - compare two floating-point numbers

LLIIBBRRAARRYY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##iinncclluuddee <>

     int
     iissggrreeaatteerr(real-floating x, real-floating y);

     int
     iissggrreeaatteerreeqquuaall(real-floating x, real-floating y);

     int
     iisslleessss(real-floating x, real-floating y);

     int
     iisslleesssseeqquuaall(real-floating x, real-floating y);

     int
     iisslleessssggrreeaatteerr(real-floating x, real-floating y);

     int
     iissuunnoorrddeerreedd(real-floating x, real-floating y);

DESCRIPTION
     Each of the macros iissggrreeaatteerr(), iissggrreeaatteerreeqquuaall(), iisslleessss(),
     iisslleesssseeqquuaall(), and iisslleessssggrreeaatteerr() take arguments x and y and return a
     non-zero value if and only if its nominal relation on x and y is true.
     These macros always return zero if either argument is not a number (NaN),
     but unlike the corresponding C operators, they never raise a floating
     point exception.

     The iissuunnoorrddeerreedd() macro takes arguments x and y and returns non-zero if
     and only if neither x nor y are NaNs.  For any pair of floating-point
     values, one of the relationships (less, greater, equal, unordered) holds.

SEE ALSO
     fpclassify(3), math(3), signbit(3)

STANDARDS     The iissggrreeaatteerr(), iissggrreeaatteerreeqquuaall(), iisslleessss(), iisslleesssseeqquuaall(),
     iisslleessssggrreeaatteerr(), and iissuunnoorrddeerreedd() macros conform to ISO/IEC 9899:1999
     (``ISO C99'').

BSD                            February 12, 2003                           BSD