将数组值与用户输入bash进行比较

Question

我正在尝试将用户输入与字符串数组值进行比较，当我这样做时，当我打印它们时，两个值看起来都相同，但if语句看不到它们是相等的。有什么明显的东西我不见了。

k=0
while [ -z $arg1 ]
do
    while [ $k -ne 9 ]
    do
    # ask question
    echo "${question[k]}"
    answer="${answer[k]}"
    read -p "YES/NO " arg1
    # check answer
    if [ '$arg1' = '$answer' ]; # problem is here
    then
        echo "Correct!"
        let "k=$k+1"
    else
        echo "Incorrect!"
        echo "Your answer: $arg1"
        echo "Correct answer: $answer"
    fi
    done
done

Answer 1

替换：你还没有把答案和问题数组放在

中

 if [ '$arg1' = '$answer' ];
 with
 if [ "$arg1" = "$answer" ] ; 

并检查