ARGV、$ARGV、@ARGV四者的关系及区别？？？

好拗口啊。。。

ARGV

    [ALL] The special filehandle that iterates over command-line filenames in @ARGV. Usually written as the null filehandle in the angle operator: <>.
$ARGV

    [ALL] Contains the name of the current file when reading from the ARGV handle using the <> or readline operators.
@ARGV

    [ALL] The array containing the command-line arguments intended for the script. Note that $#ARGV is generally the number of arguments minus one, since $ARGV[0] is the first argument, not the command name; use scalar @ARGV for the number of program arguments. See $0 for the program name.

$ARGV跟ARGV都是跟<>钻石操作符有关系的

@ARGV保存了命令行的所有参数


比如 test.pl  1.txt 2.txt

@ARGV  为(1.txt, 2.txt)

程序里如果写
while (<>) {
      print "from file $ARGV  get line:" , $_, "\n"; 
}

将依次读入1.txt, 2.txt， 并依次读入每一行。 $ARGV表示当前正在读取的文件名， ARGV表示当前正在读取的文件句柄。