为什么有点函数一定要返回值的?

[ymlazy14]

为什么有点函数一定要返回值的? 注意下面的代码不能通过, 只要把错误的那一行换为注释的文字就可以了. 请问为什么函数一定要返回一个值?

Function sReplace(SearchLine As String, SearchFor As String, ReplaceWith As String)
Dim vSearchLine As String, found As Integer

found = InStr(SearchLine, SearchFor): vSearchLine = SearchLine
If found <> 0 Then
vSearchLine = ""
If found > 1 Then vSearchLine = Left(SearchLine, found - 1)
vSearchLine = vSearchLine + ReplaceWith
If found + Len(SearchFor) - 1 < Len(SearchLine) Then _
vSearchLine = vSearchLine + Right$(SearchLine, Len(SearchLine) - found - Len(SearchFor) + 1)
End If
sReplace = vSearchLine
End Function



Private Sub Form_Load()
Dim result As String
sReplace("blackman", "man", "girl") 'result = sReplace("blackman", "man", "girl")

End Sub

[cso]

函数不一定要有返回值的，但是过程没有返回值

[programfish]

不要返回值的设为
sub sReplace(SearchLine As String, SearchFor As String, ReplaceWith As String)


XXX

end sub
过程就行了，不要写成函数

[华芸智森]

将
sReplace("blackman", "man", "girl") 'result = sReplace("blackman", "man", "girl")

改成

CALL sReplace("blackman", "man", "girl") 'result = sReplace("blackman", "man", "girl")

[lxqlogo0]

函数可以没有返回值啊
那是你的语法错误

sReplace("blackman", "man", "girl")

换成：
sReplace "blackman", "man", "girl"

记住不要返回值的时候不能用扩号