如何查看已安装PERL的模块

#!/usr/bin/perl
use strict;
use ExtUtils::Installed;

my $inst= ExtUtils::Installed->new();
my @modules = $inst->modules();

foreach(@modules)
{
        my $ver = $inst->version($_) || "???";
        printf("%-12s --  %s\n", $_, $ver);  
}
exit 0;