UNIX下perl实现代码

				#!./perl -w								BEGIN {				    chdir('t') if -d 't';				    @INC = '../lib';				}								use Getopt::Long qw(:config no_ignore_case);				die("Getopt::Long version 2.24 required--this is only version ".				    $Getopt::Long::VERSION)				  unless $Getopt::Long::VERSION >= 2.24;								print "1..9\n";								@ARGV = qw(-Foo -baR --foo bar);				undef $opt_baR;				undef $opt_bar;				print "ok 1\n" if GetOptions ("foo", "Foo=s");				print ((defined $opt_foo)   ? "" : "not ", "ok 2\n");				print (($opt_foo == 1)      ? "" : "not ", "ok 3\n");				print ((defined $opt_Foo)   ? "" : "not ", "ok 4\n");				print (($opt_Foo eq "-baR") ? "" : "not ", "ok 5\n");				print ((@ARGV == 1)         ? "" : "not ", "ok 6\n");				print (($ARGV[0] eq "bar")  ? "" : "not ", "ok 7\n");				print (!(defined $opt_baR)  ? "" : "not ", "ok 8\n");				print (!(defined $opt_bar)  ? "" : "not ", "ok 9\n");