#!/usr/bin/env perl
use warnings;
use 5.012;
my $var = 1 << 31;
say unpack( "B*", pack( "N", $var ) );
# 10000000000000000000000000000000
我如何从打包/解包中获取
my $var = 1 << 63;
这样的输出?
# 1000000000000000000000000000000000000000000000000000000000000000