VB简单计算器编程代码(附图)

VB简单计算器编程代码(附图) Public sum As Double Public k As String "定义全局变量 Private Sub Command1_Click(Index As Integer) Select Case Index Case 1 Text1.Text = Text1.Text & 1 Case 2 Text1.Text = Text1.Text & 2 Case 3 Text1.Text = Text1.Text & 3 Case 4 Text1.Text = Text1.Text & 4 Case 5 Text1.Text = Text1.Text & 5 Case 6 Text1.Text = Text1.Text & 6 Case 7 Text1.Text = Text1.Text & 7 Case 8 Text1.Text = Text1.Text & 8 Case 9 Text1.Text = Text1.Text & 9 Case 0 Text1.Text = Text1.Text & 0 Case 10 Text1.Text = Text1.Text & "." End Select End Sub Private Sub Command2_Click() sum = Text1.Text Text1.Text = "" k = "+" End Sub Private Sub Command3_Click() sum = Text1.Text Text1.Text = "" k = "-" End Sub Private Sub Command4_Click() sum = Text1.Text Text1.Text = "" k = "*" End Sub Private Sub Command5_Click() sum = Text1.Text Text1.Text = "" k = "/" End Sub Private Sub Command6_Click() Dim a As Double a = Text1.Text If k = "+" Then sum = sum + a Text1.Text = sum ElseIf k = "-" Then sum = sum - a Text1.Text = sum ElseIf k = "*" Then sum = sum * a Text1.Text = sum ElseIf k = "/" Then sum = sum / a Text1.Text = sum End If End Sub Private Sub Command7_Click() Unload Form1 End Sub Private Sub Command8_Click() Text1.Text = "" End Sub