#!/usr/bin/perl
# 全局变量
$string = "Hello, World!";
sub PrintW3xue{
# PrintHello 函数私有变量
local $string;
$string = "Hello, W3xue!";
# 子程序调用的子程序
PrintMe();
print "PrintW3xue 函数内字符串值:$string\n";
}
sub PrintMe{
print "PrintMe 函数内字符串值:$string\n";
}
sub PrintHello{
print "PrintHello 函数内字符串值:$string\n";
}
# 函数调用
PrintW3xue();
PrintHello();
print "函数外部字符串值:$string\n";