Option Explicit
Dim blackturn As Boolean '轮到黑方下子
Dim whiteturn As Boolean '轮到黑方下子
Dim qipan(0 To 15, 0 To 15) As Integer '用此二维数组表示棋盘
Dim inti As Integer '数组元素
Dim intj As Integer
Dim boolF As Boolean '表示棋局状态：进行/结束
Private Sub begin_Click() '重新开始
Me.Cls '清除窗口
For inti = 0 To 15
For intj = 0 To 15
qipan(inti, intj) = 0 '数组清零
Next
Next
Form_Load '重画棋盘
End Sub
Private Sub exit_Click() '退出
Unload Me
Set Form1 = Nothing
End Sub
Private Sub Form_Load()
Form_Paint '画棋盘
blackturn = True '黑方先下
boolF = True '开始
Label1.Caption = "黑方先下"
End Sub
'下子
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)
Dim intx As Integer '落子横向位置
Dim inty As Integer '落子竖向位置
If boolF = False Then '确定棋局是否在进行中，否，跳出
Label1.Caption = "结束"
Exit Sub
End If
'确定落子的确切位置
'如果鼠标点击位置不在棋盘中，则跳出
If x < 10 Or x > 310 Or y < 10 Or y > 310 Then
Exit Sub
End If
'如果鼠标点击位置在棋盘中，则转化为相应棋盘落子点的坐标
If (x - 10) Mod 20 < 10 Then
intx = x - (x - 10) Mod 20
Else
intx = x + 20 - (x - 10) Mod 20
End If
If (y - 10) Mod 20 < 10 Then
inty = y - (y - 10) Mod 20
Else
inty = y + 20 - (y - 10) Mod 20
End If
'把坐标转换成数组中的相应元素
inti = (intx - 10) / 20
intj = (inty - 10) / 20
'如果该数组元素不为零，即表示棋盘中相应点已有棋子，则跳出
If qipan(inti, intj) <> 0 Then
Exit Sub
End If
'画子（圆）
If blackturn = True Then
'黑色
Me.FillColor = RGB(0, 0, 0)
qipan(inti, intj) = 1 '黑子赋1
Label1.Caption = "白方"
Else
'白色
Me.FillColor = RGB(255, 255, 255)
qipan(inti, intj) = 2 '白子赋2
Label1.Caption = "黑方"
End If
Me.FillStyle = 0 '不可缺
Me.Circle (intx, inty), 8
'判断是否有五子连线
Call IfFiveLine
'轮流
blackturn = Not blackturn '取反
End Sub
Private Sub IfFiveLine() '判断是否有五子连线
Dim strwho As String '下子方名称
If qipan(inti, intj) = 1 Then '表示黑方下的子
strwho = "黑方"
Else
strwho = "白方"
End If
'分别判断横竖，对角线是否有五子，此段代码比较复杂，可能那以理解，但其执行效率极高
'非常适合与棋盘格子很多的情况
If samelinenums(1, 0) >= 5 Or samelinenums(0, 1) >= 5 Or samelinenums(1, 1) >= 5 Or samelinenums(-1, 1) >= 5 Then
MsgBox strwho & "胜！"
boolF = False '棋局结束
End If
End Sub
Function samelinenums(changei As Integer, changej As Integer) '判断同一直线上的棋子数
Dim i As Integer
Dim j As Integer
Dim num As Integer '同一线上相同颜色棋子数
'计算落子一边同颜色的棋子数
i = inti: j = intj
Do
If qipan(i, j) <> qipan(inti, intj) Then
num = max(Abs(inti - i), Abs(intj - j))
Exit Do
End If
i = i + changei: j = j + changej
Loop Until i < 0 Or i > 15 Or j < 0 Or j > 15
'计算落子另一边同颜色的棋子数
i = inti: j = intj
Do
If qipan(i, j) <> qipan(inti, intj) Then
num = num - 1 + max(Abs(inti - i), Abs(intj - j))
Exit Do
End If
i = i - changei: j = j - changej
Loop Until i < 0 Or i > 15 Or j < 0 Or j > 15
'MsgBox num
samelinenums = num
End Function
'求较大值
Function max(inta As Integer, intb As Integer)
max = inta
If max < intb Then max = intb
End Function
Private Sub Form_Paint() '以(10,10)为左上角坐标画一个16*16,每格边长为20象素的棋盘
Cls '清除
Dim i As Integer
ScaleMode = 3 '设定窗体画布的单位为象素
For i = 10 To 330 Step 20
Me.Line (10, i)-(330, i)
Me.Line (i, 10)-(i, 330)
Next
End Sub
