实现上述功能的VB 代码如下，其中加框处代码有错，请改正。

Dim n As Integer, i As Integer, t As Integer, sum As Long, s As String n = Val(Text1.Text)

For i = 1 To n ^ 3 Step 2

    sum = 0: t = i: flag = False

    Do While sum <= n ^ 3 And flag = False

       sum = sum + t

            ⑴

       If sum = n ^ 3 Then flag = True

    Loop

    If flag = True Then Exit For

Next i

s = Str(n) + "^" + Str(3) + "="

Do While sum > 0

         ⑵

    If sum = 0 Then

        s = s + Str(i)

    Else

        s = s + Str(i) + "+"

    End If

    i = i + 2

Loop

Text2.Text = s

⑴{#blank#}1{#/blank#} ⑵{#blank#}2{#/blank#} 

y=0

n=Len(Text 1．Text)

For i=1To n

    c=Mid(Text 1.Text，i，1)

    If c>=“0”And c<=“9”Then

        x=Val(c) ：a(x) =a(x) + 1

    End If

Next i

For i= 0 To 9

    If a(i) >0Then y=y+ 1

Next i

Label 1．Caption=Str(y)

a数组各元素的初值为0，程序运行时，在文本框Text 1中输入内容“pi=3．1415926535”，单击按钮Command 1后，标签Label 1中显示的内容是（  ）