将两个字符串之间每次出现的文本添加到数组bash中

Question

我需要分析在QUESTION NO:和第一个答案A.之间出现的文本，而不包括包含QUESTION NO:或A.的行。因此，只显示问题。我想将每个匹配的结果/问题附加到BASH中的数组中，这样每个问题都可以使用类似(针对问题16(的东西来检索：echo ${questions[16]}.

我的test.txt看起来像这样，例如：

QUESTION NO: 16
Which of the following is the correct answer
based on a supplied criteria for the values in the records?
A. LIMIT
B.....
C..

命令：

sed -n '/NO:/,/A./{//!p}' test.txt > justquestions.txt

似乎生成了正确的输出，但是我无法使用sed命令将每个结果附加到内存中的数组中。我一直在获取整个输出，这样每个问题就不会被一个数组号跟踪。

如何将每个匹配追加到sed/或类似命令输出的类似questions+=( "${p}" )的数组中？有时问题是一行，有时多行含特殊字符。谢谢！

如果多选答案：A.B.C.D.E.不存在，由于问题是填空，数组中会附加一行不正确的内容。

例如文本：

QUESTION NO: 123
What is the best command ever (fill in the blank ____)?
Answer: reboot

echo$｛Q_answer[4]｝返回：

What is the best command ever (fill in the blank ____)? Answer: reboot

而不是预期的：

What is the best command ever (fill in the blank ____)?

也许"end_re="也可以在出现"Answer:"或任何其他文本时停止，而不是"A."。我想知道在"？"处停止是否是最好的主意。。。

Answer 1

start_re='^[[:space:]]*QUESTION NO:[[:space:]]+([[:digit:]]+)$'
end_re='^[[:space:]]*(A[.]|Answer:)'
curr_q=       # track current question number
questions=( ) # initialize array
while read -r line; do
  if [[ $line =~ $start_re ]]; then # if we see the start of a question
    curr_q=${BASH_REMATCH[1]}       # set the current question number
    continue                        # and don't process this line further
  fi
  if [[ $line =~ $end_re ]]; then   # if we see the end of a question
    curr_q=                         # clear the current question number
    continue                        # and don't process this line further
  fi
  if [[ $curr_q ]]; then                 # when a question number exists
    if [[ ${questions[$curr_q]} ]]; then # and we already have text for it
      questions[$curr_q]+=$'n'"$line"   # append additional text after a newline
    else                                 # otherwise, if we have no existing content
      questions[$curr_q]=$line           # assign the line we just read outright
    fi
  fi
done

在以给定的问题作为输入运行以上操作后，declare -p questions会发出以下状态：

declare -a questions='([16]="Which of the following is the correct answer
based on a supplied criteria for the values in the records?")'