print "the command -->@ARGV<-- returns:\n\n";
qx !@ARGV!;
print "\n\n\$?     $?   (return status)\n",
      "\$?>>8  ",$?>>8, "(exit value of the subprocess)\n",
      "\$?&127 ",$?&127,"( which signal, if any, the process died from)\n",
      "\$?&128 ",$?&128," (core dump)\n";