08/05/28 01:29:54
$global_foo = $foo = 1;
$global_bar = $bar = 2;
@_ = (3,4); #@_に値あり
{
my $foo;
my $bar;
$foo = $_[0];
$bar = $_[1];
$foo = $global_foo unless defined $foo;
$bar = $global_bar unless defined $bar;
print "point 1: foo=$foo bar=$bar\n";
}
print "point 2: foo=$foo bar=$bar\n";
出力結果
point 1: foo=3 bar=4
point 2: foo=1 bar=2