程序文件:test.pl
复制代码 代码如下:
#!/bin/perl
# filename:test.pl
use strict;
use warnings;
#随便找一个比较好识别的序列
my $DNA="AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\n";
my $i;
my $mutant;
srand(time|$$);
$mutant=mutate($DNA);
print "Mutate \n". $DNA;
print "Here is the original DNA:\n";
print "$DNA\n";
print "Here is the mutant DNA:\n\n";
print "$mutant\n";
print "Here are 10 more successive mutations:\n";
for ($i=0;$i<10;++$i)
{
$mutant=mutate($mutant);
print "$mutant\n";
}
#子程序:根据序列的长度定义一个随机位置的子程序
sub randomposition
{
my($string)=@_;
return int(rand(length($string)));
}
#子程序:从一个数组中随机选取一个元素
sub randelement
{
my(@array)=@_;
return $array[rand @array];
}
#子程序:引用上面的子程序,从ATGC四个碱基中随机选取一个
sub randomnucleotide
{
my (@nucleotides)=qw/A T G C/;
return randelement(@nucleotides);
}
#子程序:生成突变的子程序
sub mutate
{
my($dna)=@_;
my(@nucleotides)=qw(A T G C);
my($position)=randomposition($dna);
my($newbase)=randomnucleotide(@nucleotides);
substr($dna,$position,1,$newbase);#substr($string,$initial_position,$length,replacement substring)
return $dna;
}
结果如下:
F:\>perl\test.pl
Mutate
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
Here is the original DNA:
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
Here is the mutant DNA:
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAATAAAAAAAAAAAAAAA
Here are 10 more successive mutations:
ACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAATAAAAAAAAAAAAAAA
ACAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAAAATAAAAAAAAAAAAAAA
ACAAAAAAAAACAAAAAAAAAAAAATAAAAAAAAAAAAAAATAAAAAAAAAAAAAAA
ACAAAAAAAAACAAAAAAAAAAAAATAAAAAAAAAAAAAAATAAAAAAAAAAAAAAA
ACAAAAAAAAACAAAAAAAAAAAAATAAAAAAAAAAAAAAATAAAAAAAAAAAAAAA
ACAAAAAAAAACAAAAAAAAAAAAATAAAAAAAAAAAAAAATGAAAAAAAAAAAAAA
ACTAAAAAAAACAAAAAAAAAAAAATAAAAAAAAAAAAAAATGAAAAAAAAAAAAAA
ACTAAAAAAAACAAAAAAAAAAAAATAAGAAAAAAAAAAAATGAAAAAAAAAAAAAA
ACTAAAAAAAACAAAAAAAAAAAAATAAGAAAAAAAAAAAATGTAAAAAAAAAAAAA
ACTAAAAAAAACAAAAAAAAAAAAATAAGAAAAAAAAAAAATGTAAAAAAAAAAAAA
F:\>
生物突变,模拟程序
稳了!魔兽国服回归的3条重磅消息!官宣时间再确认!
昨天有一位朋友在大神群里分享,自己亚服账号被封号之后居然弹出了国服的封号信息对话框。
这里面让他访问的是一个国服的战网网址,com.cn和后面的zh都非常明白地表明这就是国服战网。
而他在复制这个网址并且进行登录之后,确实是网易的网址,也就是我们熟悉的停服之后国服发布的暴雪游戏产品运营到期开放退款的说明。这是一件比较奇怪的事情,因为以前都没有出现这样的情况,现在突然提示跳转到国服战网的网址,是不是说明了简体中文客户端已经开始进行更新了呢?
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