Perl初学笔记之Hello World

技术  /  管理员 发布于 6年前   495

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~