[ruby-list:49254] forループ内の変数のスコープに関して

=1B$B=3Di$a$^$7$F!#=1B(B
=1B$B%a!<%j%s%0%j%9%H$K=3DiEj9F$5$;$F$$$?$@$-$^$9!!B<>e!!$H?=3D$7$^$9!#=1B=
(B

=
=1B$BJQ?t$N%9%3!<%W$K4X$7$F<ALd$H$$$&$+5$$K$J$kE@$,$"$j$^$7$?$N$G$3$N%a!<%=
k$r=3DP$5$;$F$$$?$@$-$^$7$?!#=1B(B
=1B$B0J2<$N%3!<%I$r<B9T$7$?$H$3$m=1B(B
#----------------
a=3D4;

for a in 0..10
	print "a=3D"<<a.to_s<<"\n";
end;

p a;
#----------------
#=1B$B<B9T7k2L=1B(B
$/usr/local/bin/ruby -v
ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin12.2.1]
$/usr/local/bin/ruby sample.rb
a=3D0
a=3D1
a=3D2
~
a=3D8
a=3D9
a=3D10
10

=
=1B$B$H$$$&7k2L$,=3DPNO$5$l$^$7$?!#<+J,$H$7$F$OJQ?t=1B(Ba=1B$B$N:G8e$N=3DP=
NOCM$O=1B(B4=1B$B$G$"$k$3$H$r4|BT$7$F$$$?$N$G$9$,!"=1B(B10=1B$B$H$J$C$F$7$=
^$$$^$7$?!#=1B(Bfor=1B$B%k!<%WFb$G;HMQ$5$l$kJQ?t$NM-8zHO0O$r%k!<%WFb$@$1$K=
8BDj$5$;$k$3$H$O$G$-$J$$$N$G$7$g$&$+!)=1B(B
=
=1B$B;w$?$h$&$J$3$H$r=1B(BC=1B$B8@8l$GAH$s$@$H$3$m=1B(Bfor=1B$B%k!<%WFb$NJ=
Q?t$N@k8@$N;EJ}$K$h$C$F7k2L$,0[$J$j$^$7$?!#=1B(B
#-------------------
int a=3D4;
for(int a=3D0;a<10;a++){
	printf("a=3D%d\n",a);
}

printf("%d\n",a);
#-------------------
#=1B$B<B9T7k2L=1B(B
a=3D0
a=3D1
a=3D2
~
a=3D8
a=3D9
4

#--------------------
int a=3D4;
for(a=3D0;a<10;a++){
	printf("a=3D%d\n",a);
}

printf("%d\n",a);
#---------------------
#=1B$B<B9T7k2L=1B(B
a=3D0
a=3D1
a=3D2
~
a=3D8
a=3D9
10