flashercs

$src = "ANSI.txt"
$dst = "$src.log"

$answers = 'ABCD'
$reQuestion = [regex]"^\d+.*\(\s*([$answers])\s*\)\s*$"
$stack = 0
Get-Content -Path $src | ForEach-Object {
  if ($stack -eq 0) {
    $match = $reQuestion.Match($_)
    if ($match.Success) {
      $answer = $match.Groups[1].Value
      $nextc = $answers[$answers.IndexOf($answer) + 1]
      if ($null -eq $nextc) {
        $reAnswer = "$answer.*?$"
      } else {
        $reAnswer = "$answer.*?(?=$nextc\.|$)"
      }
      $_
      $stack = 1
    }
  } elseif ($stack -eq 1) {
    if ($_ -match $reAnswer) {
      $Matches[0]
      $stack = 0
    }
  }
} | Set-Content -Path $dst
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flashercs

回复 3# for_flr

$answer=$answers[$l].split(@('A.','B.','C.','D.'),[StringSplitOptions]::RemoveEmptyEntries).trim() #四个选项分割开
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