vb.net - 努力使童谣条件起作用

我已经在VB中制作了Baa Baa Black Sheep，并且陷入了程序的最后阶段。我试图让程序声明用户是否为拥有行李的人输入了正确的信息，但似乎没有注册最后一部分。任何帮助是极大的赞赏!

Module Module1

    Sub Main()
        Dim WoolAnswer As String = ""
        Dim BagNumber As Integer = 0
        Dim FirstBag As String = ""
        Dim SecondBag As String = ""
        Dim ThirdBag As String = ""

        Console.WriteLine("Do you have any wool?")
        WoolAnswer = Console.ReadLine

        If WoolAnswer = "yes" Then
            Console.WriteLine("How many bags do you have?")
            BagNumber = Console.ReadLine

            If BagNumber = 3 Then
                Console.WriteLine("Who is the first bag for?")
                FirstBag = Console.ReadLine()

                Console.WriteLine("Who is the second bag for?")
                SecondBag = Console.ReadLine

                Console.WriteLine("Who is the third bag for?")
                ThirdBag = Console.ReadLine
            Else
                Console.WriteLine("That is not the correct amount of bags.")
            End If

        Else
            Console.WriteLine("You have no wool.")
        End If

        **If (FirstBag = "master" & SecondBag = "dame" & ThirdBag = "little girl") Then
            Console.WriteLine("You really know your nursery rhymes!")
        End If**
        **This is the part that doesn't work**

        Console.ReadLine()
    End Sub

End Module

最佳答案

您应该使用AndAlso运算符比较您的值。
If FirstBag = "master" AndAlso SecondBag = "dame" AndAlso ThirdBag = "little girl" Then
您可以使用普通的And运算符来完成此操作，但是AndAlso支持短路。

编辑:短路是一种编程结构，如果该语句的较早部分使检查该语句的其余部分变得毫无意义，则允许您跳过对多部分条件语句的各部分的求值。

示例:如果a == b AndAlso c == d返回c == d，则a == b不会尝试评估false