Perl初学笔记之Hello World

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我是靠谱客的博主清新大米，最近开发中收集的这篇文章主要介绍Perl初学笔记之Hello World，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

工作需要开始学Perl,下载个Window版(5.16)的: 下载链接
http://www.activestate.com/activeperl/downloads
安装好了之后，写第一个perl程序

复制代码代码如下:

#!/usr/bin/perl  

print "Hello,World!\n"; 

运行结果: (很像Python哦)

复制代码代码如下:

c:\Perl>perl HelloWorld.pl  

Hello,World! 

接着学了下:cpan,虽然不知道这家伙具体是干嘛，应该是能安装各种包，9000多种。
命令如下：看第二次输出的结果，应该是类似于数据库的东东吧。

复制代码代码如下:

c:\Perl>cpan App::cpanminus  

Set up gcc environment - 3.4.5 (mingw-vista special r3)  

CPAN: Term::ANSIColor loaded ok (v4.02)  

CPAN: Storable loaded ok (v2.34)  

Reading 'C:\Perl\cpan\Metadata'  

Database was generated on Fri, 07 Mar 2014 13:06:13 GMT  

CPAN: Module::CoreList loaded ok (v2.80)  

App::cpanminus is up to date (1.7001).

然后用cpanm安装模块，命令如下: (cpanm Module::Name)

复制代码代码如下:

c:\Perl>cpanm YAML  

Set up gcc environment - 3.4.5 (mingw-vista special r3)  

--> Working on YAML  

Fetching http://www.cpan.org/authors/id/I/IN/INGY/YAML-0.90.tar.gz ... OK  

Configuring YAML-0.90 ... OK  

Building and testing YAML-0.90 ... OK  

Successfully installed YAML-0.90  

1 distribution installed

如果实在不晓得如何用的话: cpanm --help //-->会看到很多提示。

复制代码代码如下:

c:\Perl>cpanm --help  

Set up gcc environment - 3.4.5 (mingw-vista special r3)  

Usage: cpanm [options] Module [...]  

Options:  

  -v,--verbose              Turns on chatty output  

  -q,--quiet                Turns off the most output

看上面的安装过程，好像是可以执行cpanm Link,果然是可以:

复制代码代码如下:

c:\Perl>cpanm http://search.cpan.org/CPAN/authors/id/S/SH/SHARYANTO/Alt-Base-0.0  

2.tar.gz  

Set up gcc environment - 3.4.5 (mingw-vista special r3)  

--> Working on http://search.cpan.org/CPAN/authors/id/S/SH/SHARYANTO/Alt-Base-0.  

02.tar.gz  

Fetching http://search.cpan.org/CPAN/authors/id/S/SH/SHARYANTO/Alt-Base-0.02.tar  

.gz ... OK  

Configuring Alt-Base-0.02 ... OK  

==> Found dependencies: Alt  

--> Working on Alt  

Fetching http://www.cpan.org/authors/id/I/IN/INGY/Alt-0.04.tar.gz ... OK  

Configuring Alt-0.04 ... OK  

Building and testing Alt-0.04 ... OK  

Successfully installed Alt-0.04  

Building and testing Alt-Base-0.02 ... OK  

Successfully installed Alt-Base-0.02  

2 distributions installed

然后开始写了个文件操作的脚本，里面有个Path::Class模块。

复制代码代码如下:

use Path::Class;  

C:\Perl\Learn>perl FindFile.pl  

Can't locate Path/Class.pm in @INC (@INC contains: C:/Perl/site/lib/MSWin32-x86-  

multi-thread C:/Perl/site/lib C:/Perl/lib .) at FindFile.pl line 4.  

BEGIN failed--compilation aborted at FindFile.pl line 4.

看提示，像没有安装该包，安装了下该包，结果果然没报这种错误:

复制代码代码如下:

C:\Perl\Learn>cpanm Path::Class  

Set up gcc environment - 3.4.5 (mingw-vista special r3)  

--> Working on Path::Class  

Fetching http://www.cpan.org/authors/id/K/KW/KWILLIAMS/Path-Class-0.33.tar.gz ..  

. OK  

Configuring Path-Class-0.33 ... OK  

Building and testing Path-Class-0.33 ... OK  

Successfully installed Path-Class-0.33  

1 distribution installed

完~