四，处理鼠标事件

'*****************************************************************************
'** 模块名称: themousedown
'**
'** 描述: 此函数主要实行以下功能：
'** 1. 判定当前游戏标志是否有效。
'** 2. 将实际坐标转化成虚拟坐标。
'** 3. 绘制玩家的棋子。
'** 4. 执行检查获胜函数。
'** 5. 执行电脑算法函数。
'**
'*****************************************************************************
Sub themousedown(ByVal x As Integer, ByVal y As Integer)
If theplayflag = False Then
Exit Sub
End If
'检查游戏状态是否有效
Dim i, j As Integer
Dim zhx, zhy As Integer
zhx = Int((x - 10) / 30)
zhy = Int((y - 10) / 30)
For i = 0 To 9
For j = 0 To 9
If table(zhx, zhy) > 0 Then
Exit Sub
End If
Next
Next
'检查当前鼠标点击的格子是否有效
Dim mycolor As Color
Dim g As System.Drawing.Graphics
g = PictureBox1.CreateGraphics
mycolor = Color.White
Dim brush1 As System.Drawing.Brush = New SolidBrush(mycolor)
g.FillEllipse(brush1, zhx * 30 + 10, zhy * 30 + 10, 30, 30)
'绘制玩家的棋子
table(zhx, zhy) = 2
For i = 0 To 191
If cwin(zhx, zhy, i) = True Then
cflag(i) = False
End If
Next
'重设电脑的获胜标志
checkwin()
'检查当前玩家是否获胜
diannao()
'调用电脑算法
End Sub

　　五、获胜检查算法。

'*****************************************************************************
'** 模块名称: checkwin
'**
'** 描述: 此模块执行以下功能:
'** 1. 检查是否和棋。
'** 2. 检查电脑是否获胜。
'** 3. 检查玩家是否获胜。
'**
'*****************************************************************************
Sub checkwin()
Dim i, j, k, m, n As Integer
Dim ca As Integer
Dim pa As Integer
Dim cnormal As Integer = 0
For i = 0 To 191
If cflag(i) = False Then
cnormal = cnormal + 1
End If
Next
If cnormal = 190 Then
Label1.Visible = True
Label1.Text = "和棋，请重新开始！"
PictureBox1.Refresh()
theplayflag = False
Exit Sub
End If
'设定和棋规则
For i = 0 To 191
If cflag(i) = True Then
ca = 0
For j = 0 To 9
For k = 0 To 9
If table(j, k) = 1 Then
If cwin(j, k, i) = True Then
ca = ca + 1
End If
End If
Next
Next
If ca = 5 Then
Label1.Visible = True
Label1.Text = "电脑获胜,请重新开始"
PictureBox1.Refresh()
theplayflag = False
Exit Sub
End If
End If
Next
'检查电脑是否获胜
For i = 0 To 191
If pflag(i) = True Then
pa = 0
For j = 0 To 9
For k = 0 To 9
If table(j, k) = 2 Then
If pwin(j, k, i) = True Then
pa = pa + 1
End If
End If
Next
Next
If pa = 5 Then
Label1.Visible = True
Label1.Text = "玩家获胜,请重新开始"
PictureBox1.Refresh()
theplayflag = False
Exit Sub
End If
End If
Next
'检查玩家是否获胜
End Sub

　六、电脑算法

'*****************************************************************************
'** 模块名称: diannao
'**
'** 描述: 此程序主要执行以下功能：
'** 1. 初始化赋值系统。
'** 2. 赋值加强算法。
'** 3. 计算电脑和玩家的最佳攻击位。
'** 4. 比较电脑和玩家的最佳攻击位并决定电脑的最佳策略。
'** 5. 执行检查获胜函数。
'**
'*****************************************************************************

Sub diannao()
Dim i, j, k, m, n As Integer
Dim dc As Integer
Dim cab As Integer
Dim pab As Integer
For i = 0 To 9
For j = 0 To 9
pscore(i, j) = 0
cscore(i, j) = 0
Next
Next
'初始化赋值数组
''' ******** 电脑加强算法 ********
For i = 0 To 191
If cflag(i) = True Then
cab = 0
For j = 0 To 9
For k = 0 To 9
If table(j, k) = 1 Then
If cwin(j, k, i) = True Then
cab = cab + 1
End If
End If
Next
Next
Select Case cab
Case 3
For m = 0 To 9
For n = 0 To 9
If table(m, n) = 0 Then
If cwin(m, n, i) = True Then
cscore(m, n) = cscore(m, n) + 5
End If
End If
Next
Next
Case 4
For m = 0 To 9
For n = 0 To 9
If table(m, n) = 0 Then
If cwin(m, n, i) = True Then
yuandian(m * 30 + 10, n * 30 + 10)
table(m, n) = 1
For dc = 0 To 191
If pwin(m, n, dc) = True Then
pflag(dc) = False
checkwin()
Exit Sub
End If
Next
End If
End If
Next
Next
End Select
End If
Next
For i = 0 To 191
If pflag(i) = True Then
pab = 0
For j = 0 To 9
For k = 0 To 9
If table(j, k) = 2 Then
If pwin(j, k, i) = True Then
pab = pab + 1
End If
End If
Next
Next
Select Case pab
Case 3
For m = 0 To 9
For n = 0 To 9
If table(m, n) = 0 Then
If pwin(m, n, i) = True Then
pscore(m, n) = pscore(m, n) + 30
End If
End If
Next
Next
Case 4
For m = 0 To 9
For n = 0 To 9
If table(m, n) = 0 Then
If pwin(m, n, i) = True Then
yuandian(m * 30 + 10, n * 30 + 10)
table(m, n) = 1
For dc = 0 To 191
If pwin(m, n, dc) = True Then
pflag(dc) = False
checkwin()
Exit Sub
End If
Next
End If
End If
Next
Next
End Select
End If
Next
''' ******** 电脑加强算法结束 ********

' ******** 赋值系统 ********
For i = 0 To 191
If cflag(i) = True Then
For j = 0 To 9
For k = 0 To 9
If table(j, k) = 0 Then
If cwin(j, k, i) = True Then
For m = 0 To 9
For n = 0 To 9
If table(m, n) = 1 Then
If cwin(m, n, i) = True Then
cscore(j, k) = cscore(j, k) + 1
End If
End If
Next
Next
End If
End If
Next
Next
End If
Next
For i = 0 To 191
If pflag(i) = True Then
For j = 0 To 9
For k = 0 To 9
If table(j, k) = 0 Then
If pwin(j, k, i) = True Then
For m = 0 To 9
For n = 0 To 9
If table(m, n) = 2 Then
If pwin(m, n, i) = True Then
pscore(j, k) = pscore(j, k) + 1
End If
End If
Next
Next
End If
End If
Next
Next
End If
Next
''' ******** 赋值系统结束 ********
''' ******** 分值比较算法 ********
Dim a, b, c, d As Integer
Dim cs As Integer = 0
Dim ps As Integer = 0
For i = 0 To 9
For j = 0 To 9
If cscore(i, j) > cs Then
cs = cscore(i, j)
a = i
b = j
End If
Next
Next
For i = 0 To 9
For j = 0 To 9
If pscore(i, j) > ps Then
ps = pscore(i, j)
c = i
d = j
End If
Next
Next
If cs > ps Then
yuandian(a * 30 + 10, b * 30 + 10)
table(a, b) = 1
For i = 0 To 191
If pwin(a, b, i) = True Then
pflag(i) = False
End If
Next
Else
yuandian(c * 30 + 10, d * 30 + 10)
table(c, d) = 1
For i = 0 To 191
If pwin(c, d, i) = True Then
pflag(i) = False
End If
Next
End If
''' ******** 分值比较算法结束 ********
checkwin()
End Sub

　　七、绘制棋子

'*****************************************************************************
'** 模块名称: yuandian
'**
'** 描述: 此函数主要进行电脑棋子的绘制。
'**
'*****************************************************************************

Sub yuandian(ByVal x As Integer, ByVal y As Integer)
Dim mycolor As Color
Dim g As System.Drawing.Graphics
g = PictureBox1.CreateGraphics
Dim zhx, zhy As Integer
zhx = Int((x - 10) / 30)
zhy = Int((y - 10) / 30)
mycolor = Color.Black
Dim brush1 As System.Drawing.Brush = New SolidBrush(mycolor)
g.FillEllipse(brush1, zhx * 30 + 10, zhy * 30 + 10, 30, 30)
End Sub