请根据算法将下列程序补充完整。

Private Sub Command1_Click()

    Label3.Caption = ""

    For i = 1 To 50

        a(i) ={#blank#}1{#/blank#}

        If i Mod 10 = 0 Then

            Label3.Caption = Label3.Caption + CStr(a(i)) + vbCrLf '换行

        Else

            Label3.Caption = Label3.Caption + CStr(a(i)) + " "

        End If

    Next i

End Sub

Private Sub Command2_Click()

    Label4.Caption = ""

    n = 0

    For i = 1 To 50

        For k = 2 To a(i) - 1

            If {#blank#}2{#/blank#} Then Exit For

        Next k

        If k = a(i) Then

            n = n + 1

        If n = 1 Then b(n) = a(i)

        For j = 1 To n - 1

            If b(j) = a(i) Then{#blank#}3{#/blank#}: Exit For

            If j = n - 1 Then b(n) = a(i)

        Next j

    End If

Next i

For j = 1 To n

    Label4.Caption = Label4.Caption + {#blank#}4{#/blank#}+ " "

Next j

为实现上述功能程序如下，但加框处的代码有误，请改正。

Private Sub Command1_Click()

    Dim n As Integer

    Dim i As Integer, c As Integer

    n = Val(Text1.Text)

    List1.Clear

    c = 0

    If n Mod 2 = 0 Then

        For        ①

            If    Then            ②

                List1.AddItem n & "=" & i & "+" & n - i

                c = c + 1

            End If

        Next i

        Label2.Caption = "共有" & c & "种组合"

    Else

        Label2.Caption = "请输入一个大于 2 的偶数"

    End If

End Sub

Function is Prime(x As Integer) As Boolean

    Dim i As Integer

    Is Prime = True

    For i = 2 To Int(Sqr(x))

        If x Mod i = 0 Then

            Is Prime = False

            Exit For

        End If

    Next i

End Function

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

登录模块

密码广泛应用于日常生活中，我们在登录网站、App、电子邮箱以及银行取款时都要输入“密码”。不少人因密码被盗而导致个人信息泄露，甚至是财产损失。

以下是王林同学设计的一款App的登录模块流程图。