Perl初學筆記之Hello World

更新時間：2015年06月15日 09:15:14 投稿：junjie

這篇文章主要介紹了Perl初學筆記之Hello World,本文是自學Perl的一篇筆記,本文著重講解了cpan的使用,需要的朋友可以參考下

工作需要開始學Perl,下載個Window版(5.16)的: 下載鏈接
http://www.activestate.com/activeperl/downloads
安裝好了之后，寫第一個perl程序

#!/usr/bin/perl  

print "Hello,World!\n"; 

運行結果: (很像Python哦)

復制代碼代碼如下:

c:\Perl>perl HelloWorld.pl  

Hello,World! 

接著學了下:cpan,雖然不知道這家伙具體是干嘛，應該是能安裝各種包，9000多種。
命令如下：看第二次輸出的結果，應該是類似于數據庫的東東吧。

復制代碼代碼如下:

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安裝模塊，命令如下: (cpanm Module::Name)

復制代碼代碼如下:

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

如果實在不曉得如何用的話: cpanm --help //-->會看到很多提示。

復制代碼代碼如下:

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

看上面的安裝過程，好像是可以執(zhí)行cpanm Link,果然是可以:

復制代碼代碼如下:

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

然后開始寫了個文件操作的腳本，里面有個Path::Class模塊。

復制代碼代碼如下:

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，像沒有安裝該包，安裝了下該包，結果果然沒報這種錯誤:

復制代碼代碼如下:

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~