已知程序如下：Private Sub s(x As Single, y As Single) Dim m As Single m = x x = m / y y = t Mod yEnd SubPrivate Sub Command1_Click() Dim a As Single, b As Single a = 8 b = 5 Call s(a, b) Print a, bEnd Sub试问：当单击命令按钮后，输出为[______]。
设有如下程序a =( ):For i = 1 To 3:Select Case i:Case 1，3:a = a + 1:Case 2，4:a = a + 2:End Select:Next i程序运行后，a的值为6，则a的初始值为（ ）。
