我在一些 if 语句内有一个 case 语句，但是在 if 语句内执行了 case 语句后，循环结束。在 case 语句之后，应该转到数组上的下一个值。发生的情况是数组中的第一个值，在通过 if 语句 then 情况后，脚本完成而不是循环到数组中的其他值。
set -A arrs a b c d
num=`expr ${#arrs[*]} - 1`
for x in `seq 0 $num`
do
var1=`some command here`
var2=`some command here`
var3=`some command here`
if [[ "$var1" == "$var2" && "$var3" == "0" ]]; then
#do something here
elif [[ "$var1" == "$var2" && "$var3" != "0" ]]; then
echo "\nContinue?"
echo "[y/n]:\c"
read yes_no
case $yes_no in
[yY])
echo "You answer yes."
echo "Some text that will go to the text file" >> some_text.txt
break
;;
[nN])
echo "you answered no"
exit
;;
*)
echo "\nTry again"
;;
esac
elif [[ "$var1" != "$var2" && "$var3" == "0" ]]; then
echo "\nContinue?"
echo "[y/n]:\c"
read no_yes
case $no_yes in
[yY])
echo "You answer yes"
echo "Some text that will go to the text file" >> some_text.txt
break
;;
[nN])
echo "you answered no"
exit
;;
*)
echo "\nTry again"
;;
esac
else
echo "Do back flip"
exit
fi
done
答案1
您break在yes语句中添加了该语句，因此它正在退出for-loop，因此无法完成对数组其余部分的测试。只需break从“是”的 case 语句中删除即可。
我对您的代码进行了一些修改进行了测试，并得到了我认为是您预期的结果：
#!/bin/sh
arrs=(a b c d)
num=`expr ${#arrs[*]} - 1`
for x in `seq 0 $num`
do
var1=`echo "hi"`
var2=`echo "hi"`
var3=`echo "hi"`
echo "var1 equals: $var1"
echo "var2 equals: $var2"
echo "var3 equals: $var3"
if [[ "$var1" = "$var2" && "$var3" = 0 ]]
then
#do something here
echo "First check"
elif [[ "$var1" == "$var2" && "$var3" != 0 ]]
then
echo "\nContinue?"
echo "[y/n]:\c"
read yes_no
case $yes_no in
[yY])
echo "You answer yes."
echo "Some text that will go to the text file" >> some_text.txt
;;
[nN])
echo "you answered no"
exit
;;
*)
echo "\nTry again"
;;
esac
elif [[ "$var1" != "$var2" && "$var3" == 0 ]]
then
echo "\nContinue?"
echo "[y/n]:\c"
read no_yes
case $no_yes in
[yY])
echo "You answer yes"
echo "Some text that will go to the text file" >> some_text.txt
;;
[nN])
echo "you answered no"
exit
;;
*)
echo "\nTry again"
;;
esac
else
echo "Do back flip"
exit
fi
done
输出（是测试）：
[root]# sh test.sh
var1 equals: hi
var2 equals: hi
var3 equals: hi
\nContinue?
[y/n]:\c
y
You answer yes.
var1 equals: hi
var2 equals: hi
var3 equals: hi
\nContinue?
[y/n]:\c
y
You answer yes.
var1 equals: hi
var2 equals: hi
var3 equals: hi
\nContinue?
[y/n]:\c
y
You answer yes.
var1 equals: hi
var2 equals: hi
var3 equals: hi
\nContinue?
[y/n]:\c
y
You answer yes.
输出（未测试）：
[root]# sh test.sh
var1 equals: hi
var2 equals: hi
var3 equals: hi
\nContinue?
[y/n]:\c
n
you answered no
答案2
我不知道是否清楚，但当您使用break和exit时，您可能会中断循环
set -A arrs a b c d
num=`expr ${#arrs[*]} - 1`
for x in `seq 0 $num`
do
var1=`some command here`
var2=`some command here`
var3=`some command here`
if [[ "$var1" == "$var2" && "$var3" == "0" ]]
then
#do something here
elif [[ "$var1" == "$var2" && "$var3" != "0" ]]
then
echo "\nContinue?"
echo "[y/n]:\c"
read yes_no
case $yes_no in
[yY])
echo "You answer yes."
echo "Some text that will go to the text file" >> some_text.txt
break
;;
[nN])
echo "you answered no"
exit
;;
*)
echo "\nTry again"
;;
esac
elif [[ "$var1" != "$var2" && "$var3" == "0" ]]
then
echo "\nContinue?"
echo "[y/n]:\c"
read no_yes
case $no_yes in
[yY])
echo "You answer yes"
echo "Some text that will go to the text file" >> some_text.txt
break
;;
[nN])
echo "you answered no"
exit
;;
*)
echo "\nTry again"
;;
esac
else
echo "Do back flip"
exit
fi
done