[.NET] 關於VB2005全域變數看不大懂

[kyle421 (放羊的橘子)]

 Dim rate As Single = 0.05
    Dim amout As Integer
    Dim total As Single = 0
    Sub show()

        If CheckBox1.Checked Then
            total += 5500 * TextBox1.Text
        End If
        If CheckBox2.Checked Then
            total += 3500 * TextBox2.Text
        End If
        total += total * rate
        TextBox3.Text = total
Private Sub RadioButton1_CheckedChanged(ByVal sender As Object, ByVal e As
System.EventArgs) Handles RadioButton1.CheckedChanged,
RadioButton2.CheckedChanged
        If RadioButton1.Checked Then
            rate = 0.05
        Else
            rate = 0.1
        End If
        show()
    End Sub我想問大大們
Dim total As Single = 0
如果宣告在sub show()這格副程式裡面...跟宣告在全域變數有什麼差??
執行局果不ㄧ樣
那如果是rate呢
如果宣告在副程式裡會有什麼差嗎
謝謝

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 118.166.73.185
→ MOONRAKER:那樣Total將沒有累加效果
→ YiJyun:rate宣告在副程式裡,RadioButton1_CheckedChanged這裡會
→ YiJyun:rate這個變數宣告
→ YiJyun:會找不到