LROUND 3CW "09 March 2006" "mathcw-1.00"
Table of contents
lroundf, lround, lroundl, lroundw, lroundq, lroundll, lrounddf, lroundd, lrounddl, lrounddll - round to nearest integer value with fixed rounding
cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ]
#include <mathcw.h>
extern long int lroundf (float x);
extern long int lround (double x);
extern long int lroundl (long double x);
extern long int lroundw (__float80 x);
extern long int lroundq (__float128 x);
extern long int lroundll (long_long_double x);
extern long int lrounddf (decimal_float x);
extern long int lroundd (decimal_double x);
extern long int lrounddl (decimal_long_double x);
extern long int lrounddll (decimal_long_long_double x);
NB: Functions with prototypes containing underscores in type names
may be available only with certain extended compilers.
Compute the whole number nearest
x,
rounding halfway cases away from zero, regardless of the current
rounding direction.
For finite nonzero arguments, the returned value is the requisite
whole number converted to type
long,
if that is representable. Otherwise, the returned value is the
nearest representable integer value.
If the argument is a NaN, the result is the most negative integer
representable in type
long,
errno is set to EDOM, and in IEEE 754 arithmetic, the
invalid
exception flag is raised. If the argument is finite, but the result
is not representable in type
long,
or the argument is +Infinity or -Infinity, the nearest such
integer value is returned, errno is set to ERANGE, and
the IEEE 754
invalid
exception flag is raised.
floor(3CW),
llrint(3CW),
llround(3CW),
lrint(3CW),
modf(3CW),
nearbyint(3CW),
rint(3CW),
round(3CW),
trunc(3CW).