某特征行下填补字符串。。。

oguy99

有一文件结构为：

ABC "xxxx"
CDE
ABC "yyyy"
CDE
...
..
ABC
ABC

有可能有的ABC行下不跟着CDE.
希望每一个ABC开头行的下行跟着CDE,怎么在没有跟着CDE的ABC行下面添加CDE？

比如
ABC "XXXX"
CDE

ABC
CDE

ABC "YYYY"
CDE

thanks

kk5234

1. sed '/CDE/d;/ABC/aCDE' infile

复制代码

英语盲学linux

awk '/ABC/{print $0;getline;if($0 != "CDE")$0 = "CDE\n"$0;print $0}'

Demon_switch

awk '/^(ABC).*/{printf "%s\n%s\n",$",$0,"CDE" }' ABC

Demon_switch

cat ABC
ABC "1"
ABC
ABC"2"
CDE
ABC"3"
ABC
ABC"5"
ABC
CDE
awk '/^(ABC).*/{printf "%s\n%s\n",$",$0,"CDE" }' ABC