想了解perl中的$a和$b介绍的相关内容吗，在本文为您仔细讲解perl 中的$a和$b的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：perl,$a,$b，下面大家一起来学习吧。
即使打开了strict和warnings选项也无妨，下面代码并无错误和警告。
#!/usr/bin/perl
use strict;
use warnings;
sub test {
$a = 1;
$b = 2;
print $a, "\n";
print $b, "\n";
}
test();
1;
下面是perl文档中对这两个变量的解释：
perldoc perlvar
$a
$b Special package variables when using sort(), see "sort" in perlfunc.
Because of this specialness $a and $b don't need to be declared (using use vars, or our()) even when using the "strict 'vars'" pragma. Don't lexicalize them with "my $a" or "my $b" if you want to be able to use them in the sort() comparison block or function.
