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OpenSolaris 2009.06 - man page for roundf (opensolaris section 3m)

round(3M)						  Mathematical Library Functions						 round(3M)

NAME
round, roundf, roundl - round to nearest integer value in floating-point format
SYNOPSIS
c99 [ flag... ] file... -lm [ library... ] #include <math.h> double round(double x); float roundf(float x); long double roundl(long double x);
DESCRIPTION
These functions round their argument to the nearest integer value in floating-point format, rounding halfway cases away from 0, regardless of the current rounding direction.
RETURN VALUES
Upon successful completion, these functions return the rounded integer value. If x is NaN, a NaN is returned. If x is +-0 or +- Inf, x is returned.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+
SEE ALSO
feclearexcept(3M), fetestexcept(3M), math.h(3HEAD), attributes(5), standards(5) SunOS 5.11 12 Jul 2006 round(3M)