执行下面的程序,单击按钮 Command1 ,窗体上显示的结果中 I 的值是_____, J 的值是_____, K 的值是_____。 Option Explicit Private Sub Command1_Click() Dim i As Integer, j As Integer Dim k As Integer i =2: j = 1 k = fun(i, fun(i, j)) + i + j Print "i="; i; "j="; j; "k="; k End Sub Function fun(a As Integer, ByVal b As Integer) As Integer a = a + b b = a + b fun = a + b End Function