#!/bin/perl

use strict;  
use warnings; 
#进行定义  
my @dna;  
my $dna_length;  
my $newbase;  
my $i=0;  

print "please input the DNA lengthn";  
chomp($dna_length=<>);  

while($i<$dna_length)  
{  
  #从四个碱基中随机选取一个  
  my(@nucleotides)=qw/A T G C/;  
  $newbase=$nucleotides[rand @nucleotides];  

  #将随机生成的序列添加到@dna的数组中  
  push(@dna,$newbase);  
  ++$i;  
}  
print "@dna"; 

perl生成特定碱基比例的随机序列的代码
方法一（不使用模块，byagonyr）#!/usr/bin/perl-wusestrict;my@seq=("A","T","C","G");my$length=10000;undefmy%hash;$hash{"A"}=int($length*0.3);$hash{"C"}=int($length*0.3);$hash{"G"}=int($length

求婚示爱的Perl代码之注释篇
原始代码代码出处：http://www.perlmonks.org/index.pl?node_id=384100#!/usr/bin/perl-wusestrict;my$f=$[;my$ch=0;subl{length}subr{join"",reversesplit("",$_[$[])}subss{substr($_[0],$_[1],$_[2])}su

求婚示爱的Perl代码之改写篇
改写代码#!/usr/bin/perl-wusestrict;my$f=$[;my$ch=0;subl{length}subr{join"",reversesplit("",$_[$[])}subss{substr($_[0],$_[1],$_[2])}subbe{$_=$_[0];p(ss($_,$f,1));$f+=l()/2;$f%=l();$f++if$ch%2;$ch++