（1）New WindowsApplication；
（2）Form1上拖拽Lable1、Lable2。
Public Class Form1
Dim data As New ArrayList
Public Enum color
red
yellow
green
blue
white
End Enum
Public Enum country
England
Sweden
Denmark
Norway
German
End Enum
Public Enum drink
tea
coffee
milk
water
beer
End Enum
Public Enum smoke
Pall_Mall
Dunhill
Blends
Blue_Master
Prince
End Enum
Public Enum position
A
B
C
D
E
End Enum
Public Enum pet
dog
bird
cat
horse
fish
End Enum
Public Structure person
Dim col As color
Dim cou As country
Dim dri As drink
Dim smo As smoke
Dim pos As position
Dim pe As pet
End Structure
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Label1.Text = "1、在一条街上，有5座房子，喷了5种颜色。" & vbCrLf & _
"2、每个房里住着不同国籍的人。" & vbCrLf & _
"3、每个人喝不同的饮料，抽不同品牌的香烟，养不同的宠物。问题是：谁养鱼？" & vbCrLf & vbCrLf & _
"1、英国人住红色房子" & vbCrLf & _
"2、瑞典人养狗" & vbCrLf & _
"3、丹麦人喝茶" & vbCrLf & _
"4、绿色房子在白色房子左面" & vbCrLf & _
"5、绿色房子主人喝咖啡" & vbCrLf & _
"6、抽Pall Mall 香烟的人养鸟" & vbCrLf & _
"7、黄色房子主人抽Dunhill香烟" & vbCrLf & _
"8、住在中间房子的人喝牛奶" & vbCrLf & _
"9、挪威人住第一间房" & vbCrLf & _
"10、抽Blends香烟的人住在养猫的人隔壁" & vbCrLf & _
"11、养马的人住抽Dunhill香烟的人隔壁" & vbCrLf & _
"12、抽Blue Master的人喝啤酒 " & vbCrLf & _
"13、德国人抽Prince香烟" & vbCrLf & _
"14、挪威人住蓝色房子隔壁" & vbCrLf & _
"15、抽Blends香烟的人有一个喝水的邻居"
Dim per(4) As person
Dim tt As Integer() = {0, 1, 2, 3, 4}
pai(tt, 0, 5)
For intColor As Integer = 0 To data.Count - 1
For i As Integer = 0 To 4
per(i).col = CType(CType(data(intColor), Integer())(i), color)
Next
For intCountry As Integer = 0 To data.Count - 1
For i As Integer = 0 To 4
per(i).cou = CType(CType(data(intCountry), Integer())(i), country)
Next
''''''''
If Not per(getIndex(per, "country", country.England)).col = color.red Then
GoTo country_end
End If
''''''''
For intDrink As Integer = 0 To data.Count - 1
For i As Integer = 0 To 4
per(i).dri = CType(CType(data(intDrink), Integer())(i), drink)
Next
'''''''''
If Not per(getIndex(per, "country", country.Denmark)).dri = drink.tea Then
GoTo drink_end
End If
If Not per(getIndex(per, "color", color.green)).dri = drink.coffee Then
GoTo drink_end
End If
'''''''''
For intSmoke As Integer = 0 To data.Count - 1
For i As Integer = 0 To 4
per(i).smo = CType(CType(data(intSmoke), Integer())(i), smoke)
Next
''''''
If Not per(getIndex(per, "color", color.yellow)).smo = smoke.Dunhill Then
GoTo smoke_end
End If
If Not per(getIndex(per, "smoke", smoke.Blue_Master)).dri = drink.beer Then
GoTo smoke_end
End If
If Not per(getIndex(per, "smoke", smoke.Prince)).cou = country.German Then
GoTo smoke_end
End If
''''''
For intPet As Integer = 0 To data.Count - 1
For i As Integer = 0 To 4
per(i).pe = CType(CType(data(intPet), Integer())(i), pet)
Next
'''''
If Not per(getIndex(per, "country", country.Sweden)).pe = pet.dog Then
GoTo pet_end
End If
If Not per(getIndex(per, "smoke", smoke.Pall_Mall)).pe = pet.bird Then
GoTo pet_end
End If
'''''
For intPos As Integer = 0 To data.Count - 1
For i As Integer = 0 To 4
per(i).pos = CType(CType(data(intPos), Integer())(i), position)
Next
'''''
If Not per(getIndex(per, "position", position.C)).dri = drink.milk Then
GoTo pos_end
End If
If Not per(getIndex(per, "position", position.A)).cou = country.Norway Then
GoTo pos_end
End If
'''''
If Check(per) Then
Dim result As String = ""
For i As Integer = 0 To 4
result &= per(i).col.ToString & "|" & per(i).cou.ToString & "|" & per(i).dri.ToString & "|" & per(i).pe.ToString & "|" & per(i).pos.ToString & "|" & per(i).smo.ToString & vbCrLf & vbNewLine
Next
Me.Label2.Text = result
Exit Sub
End If
pos_end:
Next
pet_end:
Next
smoke_end:
Next
drink_end:
Next
country_end:
Next
Next
End Sub
Private Function Check(ByVal per() As person) As Boolean
Dim result As Integer = 0
'conditon 1
If per(getIndex(per, "country", country.England)).col = color.red Then
result += 1
End If
'conditon 2
If per(getIndex(per, "country", country.Sweden)).pe = pet.dog Then
result += 1
End If
'conditon 3
If per(getIndex(per, "country", country.Denmark)).dri = drink.tea Then
result += 1
End If
'conditon 4
Dim pos_green, pos_white As position
pos_green = per(getIndex(per, "color", color.green)).pos
pos_white = per(getIndex(per, "color", color.white)).pos
If pos_green + 1 = pos_white Then
result += 1
End If
'conditon 5
If per(getIndex(per, "color", color.green)).dri = drink.coffee Then
result += 1
End If
'conditon 6
If per(getIndex(per, "smoke", smoke.Pall_Mall)).pe = pet.bird Then
result += 1
End If
'conditon 7
If per(getIndex(per, "color", color.yellow)).smo = smoke.Dunhill Then
result += 1
End If
'conditon 8
If per(getIndex(per, "position", position.C)).dri = drink.milk Then
result += 1
End If
'conditon 9
If per(getIndex(per, "country", country.Norway)).pos = position.A Then
result += 1
End If
'conditon 10
Dim pos_blend, pos_cat As position
pos_blend = per(getIndex(per, "smoke", smoke.Blends)).pos
pos_cat = per(getIndex(per, "pet", pet.cat)).pos
If pos_blend + 1 = pos_cat Or pos_blend - 1 = pos_cat Then
result += 1
End If
'conditon 11
Dim pos_dunhill, pos_horse As position
pos_dunhill = per(getIndex(per, "smoke", smoke.Dunhill)).pos
pos_horse = per(getIndex(per, "pet", pet.horse)).pos
If pos_dunhill + 1 = pos_horse Or pos_dunhill - 1 = pos_horse Then
result += 1
End If
'conditon 12
If per(getIndex(per, "smoke", smoke.Blue_Master)).dri = drink.beer Then
result += 1
End If
'conditon 13
If per(getIndex(per, "country", country.German)).smo = smoke.Prince Then
result += 1
End If
'conditon 14
Dim pos_nowei, pos_blue As position
pos_nowei = per(getIndex(per, "country", country.Norway)).pos
pos_blue = per(getIndex(per, "color", color.blue)).pos
If pos_nowei + 1 = pos_blue Or pos_nowei - 1 = pos_blue Then
result += 1
End If
'conditon 15
Dim pos_blends, pos_water As position
pos_blends = per(getIndex(per, "smoke", smoke.Blends)).pos
pos_water = per(getIndex(per, "drink", drink.water)).pos
If pos_blends + 1 = pos_water Or pos_blends - 1 = pos_water Then
result += 1
End If
If result = 15 Then
Return True
Else
Return False
End If
End Function
Private Sub pai(ByRef a As Integer(), ByVal m As Integer, ByVal n As Integer)
Dim k As Integer
If m < n Then
For k = 0 To m
pai(a, m + 1, n)
change(a, m)
Next
Else
data.Add(a.Clone)
End If
End Sub
Private Sub change(ByRef a As Integer(), ByVal m As Integer)
Dim i As Integer
Dim temp As Integer = a(0)
For i = 0 To m - 1
a(i) = a(i + 1)
Next
a(i) = temp
End Sub
Private Function getIndex(ByVal per() As person, ByVal col As String, ByVal value As Integer) As Integer
Select Case col
Case "color"
For i As Integer = 0 To 4
If per(i).col = value Then
Return i
End If
Next
Case "country"
For i As Integer = 0 To 4
If per(i).cou = value Then
Return i
End If
Next
Case "drink"
For i As Integer = 0 To 4
If per(i).dri = value Then
Return i
End If
Next
Case "pet"
For i As Integer = 0 To 4
If per(i).pe = value Then
Return i
End If
Next
Case "smoke"
For i As Integer = 0 To 4
If per(i).smo = value Then
Return i
End If
Next
Case "position"
For i As Integer = 0 To 4
If per(i).pos = value Then
Return i
End If
Next
End Select
End Function
End Class