6.13.3 `ceil', `floor', `rint', `dceil', `dfloor', `drint'
----------------------------------------------------------

ceil(NUM)

dceil(NUM)
     :: NUM $B$h$jBg$-$$:G>.$N@0?t$r5a$a$k(B.

floor(NUM)

dfloor(NUM)
     :: NUM $B$h$j>.$5$$:GBg$N@0?t$r5a$a$k(B.

rint(NUM)

drint(NUM)
     :: NUM $B$r@0?t$K$^$k$a$k(B.

RETURN
     $B@0?t(B

NUM
     $B?t(B

   * `dceil', `dfloor', `drint' $B$O(B `ceil', `floor', `rint' $B$NJLL>$G$"$k(B.

   * $BIbF0>.?t$r@0?t$K$^$k$a$kJ}K!$O(B,
     $B%*%Z%l!<%F%#%s%0%7%9%F%`$H%3%s%Q%$%i$K0MB8$9$k(B.

   * $BJ#AG?t$KBP$7$F$O@5$7$/$J$$7k2L$rJV$9$N$GCm0U$7$J$1$l$P$J$i$J$$(B.

   * @pi $B$J$I$N%7%s%\%k$r0z?t$KM?$($k$3$H$O$G$-$J$$(B.

     [0] dceil(1.1);
     1

