Question

我有关于堆栈的问题（哈希表的对应物）。基本上我知道push和pop方法。但是，当用户输入单词时，任何人都可以告诉我如何处理。所有元音都被删除，只插入列表框中的辅音。

试图研究这个问题但却找不到它。

Answer 1

回答你问题的第二部分（似乎与队列或堆栈无关）：

Dim inputString As String = "Some old harvesters can always have tankards of ale"
Dim vowels As Char() = {"a"c, "e"c, "i"c, "o"c, "u"c}

For Each c As Char In inputString.ToLower()
    If Not vowels.Contains(c) Then
        'display any constanants in the string
        Console.WriteLine(c)
    End If
Next

Answer 2

你可以这样做。当您在文本框中键入它们并将它们放入堆栈时，它会拦截您的击键，当您按下Enter键然后处理它时删除值并将其分配给列表框。如果这不是你所要求的，你需要更清楚一点。

Public Class Form1
    Dim myStack As Stack(Of Char) = New Stack(Of Char)

    Private Sub processStack(value As Stack(Of Char))
        Dim temp As List(Of Char) = New List(Of Char)
        Do While value.Count > 0
            Dim c As Char = value.Pop
            Select Case c
                Case "a"c, "e"c, "i"c, "o"c, "u"c
                Case "A"c, "E"c, "I"c, "O"c, "U"c
                Case Else
                    temp.Add(c)
            End Select
        Loop
        ListBox1.Items.Add(New String(temp.ToArray))
    End Sub

    Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox1.KeyPress
        If Not e.KeyChar = vbCr Then
            myStack.Push(e.KeyChar)
        Else
            DirectCast(sender, TextBox).Clear()
            processStack(myStack)
        End If
    End Sub
End Class

最后是Visual Basic

2 个答案: