填空题

标准模块和窗体模块的功能是计算和打印两个复数之和，在横线上填上适当内容。标准模块______。
Type comp
re As Single
im As Single
End Type
Public C As comp
窗体模块
Private Sub Commandl_Click()
Dim a As comp，b As comp

• a.re=InputBox(“输入a的实部”)a.im=InputBox(“输入a的虚部”)
• b.re=InputBox(“输入b的实部”)b.im=InputBox(“输入b的虚部”)
  ______
  Print "c"="；
• c.re； "+"；c.im； "i"
  End Sub
  Private Sub s(______)c.re = r1.re + r2.rec.im = r1.im + r2.im
  End Sub