42.
下面程序的功能是把文件file11.txt中重复字符去掉后(即若有多个字符相同,则只保留1个)写入文件file2.txt。请填空。
Private Sub Command1__Click()
Dim inchar AS String,temp AS String,outchar AS String
Outchar=” ”
Open=”file1.txt” For Input AS #1
Open=”file2.txt” For Output AS ______
n=LOF(______ )
inchar=Input$(n,1)
For k=1 To n
temp=Mid(inchar,k,1)
If InStr(outchar,temp)= ______ Then
outchar=outchar & temp
End If
Next k
print #2, ______
close #2
close #1
End Sub