在Windows 7中安装Perl [英] installing perl in windows 7

问题描述

我是Perl的外行，从没使用过...但是现在我想使用它.

I am pretty layman to Perl, never used it ...but now I want to use it.

这就是我所做的:

http://www.activestate.com/activeperl/downloads

我安装了通用版本-5.12.4.1205

I installed universal version - 5.12.4.1205

为了测试我的程序是否正常运行，我使用了以下小程序:

To test my program is working, I used the following small program :

dnacon.plx

dnacon.plx

#i/Perl64/bin/perl -w 
#Example 1-1 Concatenating DNA 

$DNA1 = 'ATTTGGTAAAATGTATA'
$DNA2 = 'TTTTGGGTTTGAAAT'

print "Here are two DNA fragments: \n\n"
print $DNA1,  "\n\n"
print $DNA2,  "\n\n"

$DNA3 = "$DNA1$$DNA2"
print "$DNA3\n\n

当我尝试执行它时，以下是带有错误的命令提示符.

When I try to execute it the following is command prompt with errors.

很抱歉出现了太基本的问题...

Sorry for too basic question...

EDTIS:

When I just type dnacon.plx, it is seems that it is working, but with error !!! 

c:\myperllessions>dnacon.plx

Scalar found where operator expected at C:\myperllessions\dnacon.plx line 5, nea
r "$DNA2"
        (Missing semicolon on previous line?)
syntax error at C:\myperllessions\dnacon.plx line 5, near "$DNA2 "
Execution of C:\myperllessions\dnacon.plx aborted due to compilation errors.

我可以去吗???什么可能是错误...编译错误????

Am I good to go ??? What could be the error ...compilation errors ????

我现在正在使用以下内容:这是正确的吗?

I am using the following now : is this correct ?

#i/Perl64/bin -w 

我将脚本更改为以下内容:

I changed my script to following:

#i/Perl64/bin -w 
#Example 1-1 Concatenating DNA 
use strict; 
use warnings;
$DNA1 = 'ATTTGGTAAAATGTATA';
$DNA2 = 'TTTTGGGTTTGAAAT';

print "Here are two DNA fragments: \n\n";
print $DNA1,  "\n\n"; 
print $DNA2,  "\n\n"; 

$DNA3 = "$DNA1$$DNA2"; 
print "$DNA3\n\n";

我遇到以下错误:

c:\ myperllessions> dnacon.plx

c:\myperllessions>dnacon.plx

Global symbol "$DNA1" requires explicit package name at C:\myperllessions\dnacon
.plx line 5.
Global symbol "$DNA2" requires explicit package name at C:\myperllessions\dnacon
.plx line 6.
Global symbol "$DNA1" requires explicit package name at C:\myperllessions\dnacon
.plx line 9.
Global symbol "$DNA2" requires explicit package name at C:\myperllessions\dnacon
.plx line 10.
Global symbol "$DNA3" requires explicit package name at C:\myperllessions\dnacon
.plx line 12.
Global symbol "$DNA1" requires explicit package name at C:\myperllessions\dnacon
.plx line 12.
Global symbol "$DNA2" requires explicit package name at C:\myperllessions\dnacon
.plx line 12.
Global symbol "$DNA3" requires explicit package name at C:\myperllessions\dnacon
.plx line 13.
Execution of C:\myperllessions\dnacon.plx aborted due to compilation errors.

现在是我的编程知识问题还是与安装有关的问题?????

Is my problem now with programming knowledge or something to do with installation ?????

推荐答案

要使perl被识别，必须将C:\Perl64\bin添加到PATH环境变量中.转到Control Panel > System > Advanced System Settings > Environment Variables.在顶部的标记为User variables for <user>的框中编辑包含PATH的行，并在末尾添加;C:\Perl64\bin(注意分号).确保不要破坏已经存在的任何东西.

To get perl to be recognized, you must add C:\Perl64\bin to the PATH environment variable. Go to Control Panel > System > Advanced System Settings > Environment Variables. Edit the line containing PATH in the top box marked User variables for <user>, and add ;C:\Perl64\bin (note the semicolon) to the end. Be sure not to corrupt anything that's already there.

在最新编辑-Global symbol requires explicit package name中遗留下的问题是因为您添加了use strict(这是一件非常好的事情)并且没有声明变量.同样，行#i/Perl64/bin -w不会执行任何操作，也可以将其删除.改写这个

The problems you are left with in your latest edit - Global symbol requires explicit package name - are because you have added use strict (a very good thing to do) and you haven't declared your variables. Also the line #i/Perl64/bin -w won't do anything and may as well be removed. Write this instead

use strict; 
use warnings;

my $DNA1 = 'ATTTGGTAAAATGTATA';
my $DNA2 = 'TTTTGGGTTTGAAAT';

print "Here are two DNA fragments: \n\n";
print $DNA1,  "\n\n"; 
print $DNA2,  "\n\n"; 

my $DNA3 = "$DNA1$$DNA2"; 
print "$DNA3\n\n";

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