Question

也许我没有看到它，但我真的相信我有永远的循环！有人可以帮忙吗？我从一开始就开始这样做，我可以让用户再次使用代码。谢谢你的帮助。

代码：

'Written by Douglas Howe
Option Explicit
Dim colorPicOne, colorPicTwo, tryAgain

'initial do
do
  'first prompt
  do
    Wscript.StdOut.WriteLine "Pick a primary color (i.e blue, red, or yellow): "
    colorPicOne = lcase(wscript.StdIn.ReadLine)
    if colorPicOne <> "blue" and colorPicOne <> "red" and colorPicOne <> "yellow" then
      Wscript.StdOut.WriteLine "Not a primary color! Please pick another color: "
    else 
      exit do
    end if
  loop while colorPicOne <> "blue" OR colorPicOne <> "red" or colorPicOne <> "yellow"

  'second prompt
  do
    Wscript.StdOut.WriteLine "Pick another primary color (i.e blue, red, or yellow): "
    colorPicTwo = lcase(wscript.StdIn.ReadLine)
    if colorPicTwo <> "blue" and colorPicTwo <> "red" and colorPicTwo <> "yellow" then
      Wscript.StdOut.WriteLine "Not a primary color! Please pick another color: "
    else
      exit do
    end if
  loop while colorPicTwo <> "blue" OR colorPicTwo <> "red" or colorPicTwo <> "yellow"

  if colorPicOne = "red" and colorPicTwo = "blue" then
    Wscript.StdOut.Writeline "Your color is purple!"
  else
    if colorPicOne = "blue" and colorPicTwo ="red" then
      Wscript.StdOut.Writeline "Your color is purple!"
  end if


  if colorPicOne = "red" and colorPicTwo = "yellow" then
    Wscript.StdOut.Writeline "Your color is orange!"
  else
    if colorPicOne = "yellow" and colorPicTwo ="red" then
      Wscript.StdOut.Writeline "Your color is orange!"
  end if

  if colorPicOne = "blue" and colorPicTwo = "yellow" then
    Wscript.StdOut.Writeline "Your color is green!"
  else
    if colorPicOne = "yellow" and colorPicTwo ="blue" then
      Wscript.StdOut.Writeline "Your color is green!"
  end if

  Wscript.Stdout.WriteLine "Would you like to try again? (yes or no) :"
  tryAgain =lcase(Wscript.StdIn.ReadLine)

  if tryAgain = "no" then
    Wscript.Stdout.WriteLine "Have a nice day"
    exit do
    if tryAgain = "yes" then
      Wscript.Stdout.WriteLine "Ok!"
    else 
      Wscript.Stdout.WriteLine "Sorry, you gave an invalid response. Good Bye!"
      exit do
    end if
  end if
loop while tryAgain = "yes"

我的错误表明我的loop没有do。

Answer 1

问题不在于你有一个循环而没有那么多，你有几个（我发现3个）块if语句没有用end if正确关闭。在最终的嵌套级别中，您的最终loop没有do。我认为这就是你的意图：

'Written by Douglas Howe
Option Explicit
Dim colorPicOne, colorPicTwo, tryAgain

'initial do
do
    'first prompt
    do
        Wscript.StdOut.WriteLine "Pick a primary color (i.e blue, red, or yellow): "
        colorPicOne = lcase(wscript.StdIn.ReadLine)
        if colorPicOne <> "blue" and colorPicOne <> "red" and colorPicOne <> "yellow" then
            Wscript.StdOut.WriteLine "Not a primary color! Please pick another color: "
        else 
            exit do
        end if
    loop while colorPicOne <> "blue" OR colorPicOne <> "red" or colorPicOne <> "yellow"

    'second prompt
    do
        Wscript.StdOut.WriteLine "Pick another primary color (i.e blue, red, or yellow): "
        colorPicTwo = lcase(wscript.StdIn.ReadLine)
        if colorPicTwo <> "blue" and colorPicTwo <> "red" and colorPicTwo <> "yellow" then
            Wscript.StdOut.WriteLine "Not a primary color! Please pick another color: "
        else
            exit do
        end if
    loop while colorPicTwo <> "blue" OR colorPicTwo <> "red" or colorPicTwo <> "yellow"

    if colorPicOne = "red" and colorPicTwo = "blue" then
        Wscript.StdOut.Writeline "Your color is purple!"
    else
        if colorPicOne = "blue" and colorPicTwo ="red" then
            Wscript.StdOut.Writeline "Your color is purple!"
        end if 'This was missing
    end if

    if colorPicOne = "red" and colorPicTwo = "yellow" then
        Wscript.StdOut.Writeline "Your color is orange!"
    else
        if colorPicOne = "yellow" and colorPicTwo ="red" then
            Wscript.StdOut.Writeline "Your color is orange!"
        end if

        if colorPicOne = "blue" and colorPicTwo = "yellow" then
            Wscript.StdOut.Writeline "Your color is green!"
        else
            if colorPicOne = "yellow" and colorPicTwo ="blue" then
                Wscript.StdOut.Writeline "Your color is green!"
            end if 'This was missing
        end if

        Wscript.Stdout.WriteLine "Would you like to try again? (yes or no) :"
        tryAgain =lcase(Wscript.StdIn.ReadLine)

        if tryAgain = "no" then
            Wscript.Stdout.WriteLine "Have a nice day"
            exit do
            if tryAgain = "yes" then
                Wscript.Stdout.WriteLine "Ok!"
            else 
                Wscript.Stdout.WriteLine "Sorry, you gave an invalid response. Good Bye!"
                exit do
            end if 'This was missing
        end if
    end if
loop while tryAgain = "yes"

Answer 2

错误消息具有误导性。问题不在于您Loop没有Do，而是Loop位于同一地方没有Do的地方上下文。

这是您观察到的行为的实际原因：

if colorPicOne = "red" and colorPicTwo = "blue" then
  Wscript.StdOut.Writeline "Your color is purple!"
else
  if colorPicOne = "blue" and colorPicTwo ="red" then
    Wscript.StdOut.Writeline "Your color is purple!"
end if

从缩进的角度来看，你可能意味着：

if colorPicOne = "red" and colorPicTwo = "blue" then
  Wscript.StdOut.Writeline "Your color is purple!"
else
  if colorPicOne = "blue" and colorPicTwo ="red" then Wscript.StdOut.Writeline "Your color is purple!"
end if

但你实际拥有的（有适当的缩进）是这样的：

if colorPicOne = "red" and colorPicTwo = "blue" then
  Wscript.StdOut.Writeline "Your color is purple!"
else
  if colorPicOne = "blue" and colorPicTwo ="red" then
    Wscript.StdOut.Writeline "Your color is purple!"
  end if
end if  '<-- missing "end if" here!

基本上，您在另一个If..End If表达式的Else分支中嵌套了If，而没有关闭Else分支。因为所有后续语句也嵌套在该分支内，所以第一个Do和最后一个Loop处于不同的上下文中。

在VBScript中，您可以像这样编写If表达式：

If condition Then statement Else other_statement

或者像这样：

If condition Then
  statement
Else
  other_statement
End If

即。如果您将statement放在新行上，则必须使用End If关闭整个表达式。此规则的唯一例外是使用行继续运算符（_）包装行：

If condition Then _
  statement

上述内容在没有End If的情况下有效，因为它在技术上只是一行。

我有一个错误，指出我有一个没有做

2 个答案: