为了实现这一目标，完善下列程序，使之能完成该功能。

Private Sub Command1_Click()

    Const n=20

    Dim i As Integer, j As Integer

    Dim a(1 To n) As integer

    For j=1 To n

        a(j)=0

    Next j

    For i=1 To n

        For j=1 To n

            If j Mod i=0 Then

                {#blank#}1{#/blank#}

            End If

        Next j

    Next i

    For j=1 To n

        If {#blank#}2{#/blank#} Then List1.AddItem Str(j)

    Next j

End Sub

①密码是六位数字，前面两位为59；

②最后两位数字相同；

③能被12和38整除。

程序界面如图所示，单击“找回密码”按钮(Command1)后，可能的密码显示在列表框List1中。

问题：实现上述功能的VB 代码如下，但加框处代码有错，请改正。

Private Sub Command1_Click()

    Dim n as long , sum as long , i As Long Dim x as long , y as long

    List1.Clear

    n = Val(Text1.Text) sum = 0

    For i = 10 To n

        x =               ‘①

        y = 0

        Do While x > 0

            y =         ‘②

            x = x \ 10

        Loop

        If y = i Then

            List1.additem Str(i)

            sum = sum+1

        End if

    Next i

Label1.caption = “共有”& Str(sum) & “个回文数” End Sub

①{#blank#}1{#/blank#}②{#blank#}2{#/blank#}

Private Sub Command1_Click()

    Dim i As Integer, n As Integer

    Dim s As Integer, t As Integer, k As Integer

    s = 0

    For i = 1 To 1000

        n = i

        t = 0

        k = 0

        Do While n > 0

            If n Mod 2 = 1 Then t = t + 1 Else k = k + 1

            {#blank#}1{#/blank#}

        Loop

        If {#blank#}2{#/blank#}Then s = s + 1

    Next i

    Text1.Text = Str(s)

End Sub

有一种火柴棒游戏，将火柴棒摆成形如“A+B=C”的火柴棒等式。用n根火柴棒摆放数学等式的规则约定如下：

⑴A、B都是不大于1000的正整数，若数值非零，则最高位不能是0；

⑵摆放“+”与“=”各使用两根火柴棒；

⑶A+B=C 与B+A=C视为相同的等式；

⑷n根火柴棒必须全部用上。

小明依据上述规则使用VB编写程序，研究“使用n根火柴棒，可以摆放出哪些不同的等式”，代码如下所示。请回答下列问题。

Dim sz(0 To 9) As Integer     ‘数组元素sz(i)用于存储数字i所使用的火柴棒的数量

Private Sub Form_Load()

    sz(0) = 6 : sz(1) = 2 : sz(2) = 5 : sz(3) = 5 : sz(4) = 4

    sz(5) = 5 : sz(6) = 6 : sz(7) = 3 : sz(8) = 7 : sz(9) = 6

End Sub

‘自定义函数hcs用于求解摆放数字x需要使用的火柴棒数量

Function hcs(ByVal x As Integer) As Integer

    Dim s As Integer, k as integer

    s = 0

    Do While     ①    

        k = x Mod 10

        s=s+sz(k)

        x = x \ 10

    Loop

    hcs = s + sz(x)

End Function

Private Sub Command1_Click()

    Dim n As Integer

    Dim a As Integer, b As Integer, c As Integer

    n = Val(Text1.Text)

    ans = 0

    List1.Clear

    For a = 0 To 999

        For b =    ②     To 999

            c = a + b

            If     ③    Then

                List1.AddItem (Str(a) + "+" + Str(b) + "=" + Str(c))

                ans = ans + 1

            End If

        Next b

    Next a

    List1.AddItem ("共有" + Str(ans) + "种等式")

End Sub