e$B0J2<$N$h$&$K!"e(B0x3fffffff.div(2.0) e$B$He(B 0x40000001.div(2.0)
e$B$Ge(B
e$B>.?tE@0J2<$,$D$/$+$I$&$+$,0c$$$^$9!#e(B
% ./ruby -e ‘p 0x3fffffff.div(2.0)’
536870911
% ./ruby -e ‘p 0x40000001.div(2.0)’
536870912.5
% ./ruby -v
ruby 1.9.0 (2008-05-01 revision 16248) [i686-linux]