ROUND(3) BSD Library Functions Manual ROUND(3)

NAME
     rroouunndd, llrroouunndd, llllrroouunndd - round to integral value, regardless of rounding
     direction

SYNOPSIS
     ##iinncclluuddee <>

     double
     rroouunndd(double x);

     long double
     rroouunnddll(long double x);

     float
     rroouunnddff(float x);

     long int
     llrroouunndd(double x);

     long int
     llrroouunnddll(long double x);

     long int
     llrroouunnddff(float x);

     long long int
     llllrroouunndd(double x);

     long long int
     llllrroouunnddll(long double x);

     long long int
     llllrroouunnddff(float x);

DESCRIPTION
     The rroouunndd() functions return the integral value nearest to x rounding
     half-way cases away from zero, regardless of the current rounding direc-
     tion.

     The llrroouunndd() and llllrroouunndd() functions return the integral value nearest to
     x (rounding half-way cases away from zero, regardless of the current
     rounding direction) in the return formats specified.  If the rounded
     value is outside the range of the return type, the numeric result is
     unspecified and the "invalid" floating-point exception is raised. A range
     error may occur if the magnitude of x is too large.

SSPPEECCIIAALL VVAALLUUEESS
     rroouunndd(+-0) returns +-0.

     rroouunndd(+-infinity) returns +-infinity.

     The rroouunndd() functions may, but are not required to, raise the "inexact"
     floating-point exception for non-integer numeric arguments.

     The llrroouunndd() and llllrroouunndd() functions need not raise the "inexact" float-
     ing-point exception for non-integer arguments that round to within the
     range of the return type.

SEE ALSO
     abs(3), fabs(3), ceil(3), floor(3), math(3), rint(3)

STANDARDS     The rroouunndd() , llrroouunndd() , and llllrroouunndd() functions conform to ISO/IEC
     9899:1999(E).

BSD                              July 22, 2003                             BSD