使用 awk 时出现意外的换行符或字符串结尾

Question

文件.txt 包含

a,b,yes
x,y,no

awk -F',' '($3 == "是")' file.txt

a,b,yes

当我在 awk 中使用变量时

res=yes
awk -F',' "($3 == "$res")" file.txt

awk: cmd. line:1: ( == yes) 
awk: cmd. line:1:   ^ syntax error 
awk: cmd. line:2: ( == yes) 
awk: cmd. line:2:         ^ unexpected newline or end of string

Answer 1

awk -F',' -v res=no '($3 == res)' file.txt
x,y,no

或者

res=yes
awk -F',' "(\$3 == \"$res\")" file.txt
a,b,yes