发道题目，大家共勉一下！

stephen412

问题：
test.txt  源文件如下：
#more test.txt
I am a student , I like UNIX , I aways read the User and Operation
Documents , I know it is very important for me .
But , I do not like the User and Operation Documents . Since it is so
difficult for reading and understanding .
Last Sunday , one of my friend told me that the User and
Operation
Documents
will upgraded to the Version 3.1 .

文件中的换行符号不可以改变。请规整的替换User and Operation Documents
为Instruction Documents 将文件改变为下列的格式（注意格式不可以乱更改）：

希望改变为：

#more test.txt
I am a student , I like UNIX , I aways read the Instruction Documents ,
I know it is very important for me .
But , I do not like the Instruction Documents. Since it is so
difficult for reading and understanding .
Last Sunday , one of my friend told me that the Instruction Documents
will upgraded to the Version 3.1 .

就是你不可以修改源文件的换行符哦！
呵呵，保持源文件格式哦！

想想看吧！

PS: 其实，这道题目就是考验，当你的替换文件中的替换目标，不在一行时候的sed解决办法。


题目的答案在第五页哦 ！题目的答案在第五页哦 ！题目的答案在第五页哦 ！题目的答案在第五页哦 ！题目的答案在第五页哦 ！

[ 本帖最后由 stephen412 于 2006-8-22 20:39 编辑 ]

bwater

你的意思是只替换中间的User and Operation Documents 吗
还是全部要替换，如果全部替换
User and
Operation
Documents
要成什么样子才不违反规则呢

scode

我想是变成:

1. Last Sunday , one of my friend told me that the
   
2. Instruction
   
3. Documents

复制代码

笨点的办法

1. sed -e 's/User and/Instruction/g1' -e 's/User and/Instruction/g2'  -e 's/User and//g3' -e 's/Operation/Instruction/g3' u_file

复制代码

不对，不能用简单的使用sed

[ 本帖最后由 scode 于 2006-8-21 08:06 编辑 ]

zongyaotang

脚本：
FNM=bb
DC=bb1

awk -F# -v DIC=$DC 'BEGIN {
        cnt = 0
        while(getline < DIC > 0)
        {       a[cnt] = $1
                b[cnt++] = $2
        }
        total= cnt
}
{       for(i = 0; i < total; i++)  gsub(a[i], b[i], $0)
        printf("%s\n", $0)
        while(getline > 0)
        {       for(i = 0; i < total; i++)  gsub(a[i], b[i], $0)
                printf("%s\n", $0)
        }
}' $FNM

文件bb1可以看作词典，这里是如下的一行：
User and Operation Documents#Instruction Documents

这是造词典的万能替换法。

stephen412

OK !我再说清楚一些！

问题：
test.txt  文件如下：
#more test.txt
I am a student , I like UNIX , I aways read the User and Operation
Documents , I know it is very important for me .
But , I do not like the User and Operation Documents . Since it is so
difficult for reading and understanding .
Last Sunday , one of my friend told me that the User and
Operation
Documents
will upgraded to the Version 3.1 .

改变为：

#more test.txt
I am a student , I like UNIX , I aways read the Instruction Documents ,
I know it is very important for me .
But , I do not like the Instruction Documents. Since it is so
difficult for reading and understanding .
Last Sunday , one of my friend told me that the Instruction Documents
will upgraded to the Version 3.1 .

：-) Is anybody clear ?
提示：楼上的用的太复杂了，使用模式空间和保持空间，或者使用next 模式哦！
会简单很多哦！

[ 本帖最后由 stephen412 于 2006-8-21 15:14 编辑 ]

stephen412

原帖由 scode 于 2006-8-20 23:38 发表
我想是变成:

1. Last Sunday , one of my friend told me that the
   
2. Instruction
   
3. Documents

复制代码

笨点的办法
[code]sed -e 's/User and/Instruction/g1' -e 's/User and/Instruction/g2'  -e 's/Us ...

聪明哦！
呵呵！
但是不可以用简单的sed哦！那样子是没有办法成功的哦！

[ 本帖最后由 stephen412 于 2006-8-21 08:41 编辑 ]

hwxo

顶2楼的，楼主没有说明白

stephen412

那么我现在总是说明白了吧！

大家赶紧抓紧时间思考吧！这个题目其实他的内涵很丰富阿！
他让我们可以更加深层次的认识sed，了解模式空间和保持空间，以及next模式的概念哦！
我觉得对我们大家是有好处的！

[ 本帖最后由 stephen412 于 2006-8-21 09:53 编辑 ]

stephen412

没有人回答阿！
看来，这个帖子要沉掉了。
这样子吧，周末如果没有人回答出答案，我就公布一下，然后将整个分析的思路也写出来。
共勉一下！

woodie

原帖由 stephen412 于 2006-8-21 08:38 发表
OK !我再说清楚一些！

问题：
test.txt  文件如下：
#more test.txt
I am a student , I like UNIX , I aways read the User and Operation
Documents, I know it is very important for me .
But , I do not like the User and Operation Documents . Since it is so
difficult for reading and understanding .
Last Sunday , one of my friend told me that the User and
Operation
Documents
will upgraded to the Version 3.1 .

改变为：

#more test.txt
I am a student , I like UNIX , I aways read the Instruction Documents
I know it is very important for me .
But , I do not like the Instruction Documents. Since it is so
difficult for reading and understanding .
Last Sunday , one of my friend told me that the Instruction Documents
will upgraded to the Version 3.1 .

：-) Is anybody clear ?
提示：楼上的用的太复杂了，使用模式空间和保持空间，或者使用next 模式哦！
会简单很多哦！

你确定你真的说明白了吗？
如上，红色的逗号和其后跟随的空格是忘记敲了还是故意要丢掉？^_^第一个Documents后要换行这一点似乎没有什么疑问。
如果没有错误，这样的一行perl应该就搞定了：
perl -0pe 's/User\sand\sOperation\sDocuments(.\s*)/Instruction Documents\n/gs'
多行的操作用perl最方便。用sed虽然要麻烦点，但也远不是什么难题，我就不写了。^_^