[填空题] 下面程序的功能是统计字符串中“i”的个数，请填空。 Sub COU( ) Dim n As Integer a$ = "Beijing University of Te

[填空题] 下面程序的功能是统计字符串中“i”的个数，请填空。

Sub COU( )

Dim n As Integer

a$ = "Beijing University of Technology"

n = Len(a$ )

For i = 1 To n

b$ =Mid$(a$,i, 1)

If 【11】 Then x=x + 1

Next

Print "x ="; x

End Sub