基于sed 的猫狗游戏

1.测试文件

[root@L shells]# cat catDog.txt
snake
snake
pig
bird
dog
cat
snake
pig
bird
snake
cat
bird
dog
bird
tiger
snake
bird
cat
lion
ji
sdf

2.sed脚本文件

[root@L shells]# cat sed.txt
/cat/,/dog/s/$/<---/

3.测试效果

[root@L shells]# sed -f sed.txt < catDog.txt
snake
snake
pig
bird
dog
cat <---
snake  <---
pig<---
bird<---
snake<---
cat<---
bird<---
dog <---
bird
tiger
snake
bird
cat<---
lion<---
ji<---
sdf<---