A:to write
B:writes
C:writing
D:wrote
把下列各数分别填入相应的大括号
﹣5,|﹣ 34 |,0,﹣3.14, 227 ,﹣12,0.1010010001…,+1.5,﹣30%,﹣(﹣6),﹣ π3
正有理数集合:{____…}
非正整数集合:{____…}
负分数集合:{____…}
无理数集合:{____…}.
Private Sub Command1_Click ( )
Dim a As Integer
Dim b As Integer
Dim C As Integer
a = Val ( Text1.Text )
b = Val ( Text2.Text )
c= a+b^2
Text3.Text = Str(c)
End Sub
程序运行时,单击命令按钮Command1后弹出如图所示的错误信息提示。出现错误的原因是( )